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1
Taylor, Alan G. "Onion Seed Quality". HortScience 40, n. 4 (luglio 2005): 1141A—1141. http://dx.doi.org/10.21273/hortsci.40.4.1141a.
Abstract (sommario):
High seed quality is required to obtain optimal plant stands and to achieve maximum yield potential. Onion seeds are commonly coated and treated with an insecticide and fungicide to control early season insects and diseases. The seed treatments may cause phytotoxicity in standard germination tests, and thus reduce the percent germination of a seed lot. The objective of this study was to examine the effect of seed quality on seed storage, stand establishment and yield. Two seed lots of two long-day onion varieties were pelleted and treated with the seed treatments Trigard and Pro-Gro. Standard germination and saturated salt aging tests were performed on each seed lot, indicating a high and lower quality seed lot for each variety. Aging was conducted by equilibrating pelleted seeds at 35% relative humidity and aging at 25 °C for up to 12 months. Aging decreased germination with time, especially for the lower quality lots. Field studies were conducted in two locations in upstate New York. The plant stand was greater in the high compared to the lower quality lots in both varieties at both locations. Yield was reduced in the lower quality than high quality lot; however, the response differed by variety and location. Overall, the initial seed quality had an impact on seed storagability, stand establishment and yield.
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Raymond, Michael A., Jeffrey C. Stark e Glen A. Murray. "Irrigation Management Effects on Spring Pea Seed Yield and Quality". HortScience 22, n. 6 (dicembre 1987): 1262–63. http://dx.doi.org/10.21273/hortsci.22.6.1262.
Abstract (sommario):
Abstract Seed yield and quality of four spring pea cultivars (Pisum sativum L.) were evaluated when subjected to deficient, optimal, and excessive irrigation levels. Irrigation at 100% of the estimated optimal irrigation amount (IR) resulted in the greatest seed yields, whereas irrigation at 60% or 140% IR reduced yields by 468 and 222 kg·ha−1, respectively. Yield reductions for individual cultivars were as large as 694 and 350 kg·ha−1 for deficient and excessive irrigation, respectively. Increased yields for the 100% IR treatment resulted from increases in pods per plant and seeds per pod. Irrigation at 140% IR reduced germination of pea seed by 5% to 13%. Deficient irrigation reduced seed yield more than did excessive irrigation, whereas excessive irrigation caused the greatest reduction of seed quality.
3
ABLETT, GARY. "EFFECT OF SEEDING RATE AND HARVEST METHOD ON AGRONOMIC CHARACTERISTICS OF WHITE BEAN". Canadian Journal of Plant Science 68, n. 3 (1 luglio 1988): 801–4. http://dx.doi.org/10.4141/cjps88-094.
Abstract (sommario):
Kentwood white bean (Phaseolus vulgaris L.) was sown at three seeding rates in narrow rows for 4 yr With direct-harvesting, yields increased as seeding rates increased up to 64 seeds m−2, whereas, with hand-harvesting seed yield was not affected. Seed quality was superior in the direct-harvested plots; however, yield was lower. Seed size was not affected.Key words: White bean, narrow-row, yield, seed quality
4
LYKHOCHVOR, Andriy. "YIELD AND SEED QUALITY OF SPRING OILSEED CROPS". Folia Pomeranae Universitatis Technologiae Stetinensis Agricultura, Alimentaria, Piscaria et Zootechnica 336, n. 43 (30 settembre 2017): 75–82. http://dx.doi.org/10.21005/aapz2017.43.3.09.
5
Nerson, Haim. "Relationship Between Plant Density and Fruit and Seed Production in Muskmelon". Journal of the American Society for Horticultural Science 127, n. 5 (settembre 2002): 855–59. http://dx.doi.org/10.21273/jashs.127.5.855.
Abstract (sommario):
Field experiments were conducted in 1996 and 1997 to examine the effects of plant density on yield and quality of fruit and seeds of muskmelons (Cucumis melo L.). Two open-pollinated cultivars, Noy Yizre'el (Ha'Ogen type) and TopMark (western U.S. shipper type), were grown at plant densities ranging from 0.5 to 16.0 plants/m2 under commercial conditions. The highest marketable fruit yields were achieved with plant densities of 2 to 4 plants/m2. In contrast, the highest seed yields were obtained at 8 to 12 plants/m2. Seed yield index [seed yield (g)/fruit yield (kg)] was used as a parameter to define seed production efficiency. High seed yield was closely related to high value of the seed yield index. High seed yield indexes resulted from high plant densities (up to 12 plants/m2), at which the crops produced many, but relatively small fruit. In all cases, the seed yield per fruit (seed number and seed size) increased with increasing fruit weight. However, the sum of the seed yield of two small fruit was always greater than the seed yield of one, double-sized fruit. There was a clear exception with extremely small fruit (<500 g), which produced both low seed yields and poor seed quality. A positive relationship was found between fruit size and seed size in both cultivars. Nevertheless, relatively small seeds (25 to 30 mg) extracted from relatively small fruit (500 to 1000 g) showed the best performance in terms of germination and emergence percentages and rates, and in the vegetative development vigor of the seedlings.
6
Stramkale, Veneranda, Aldis Stramkalis, Ļubova Komlajeva, Māra Selecka, Māra Vikmane e Arturs Stalažs. "EVALUATION OF LATVIAN FLAX VARIETIES BY SEED YIELD AND QUALITY". Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (3 agosto 2015): 133. http://dx.doi.org/10.17770/etr2009vol1.1116.
Abstract (sommario):
Flax cultures give dual-purpose production – flax fibre and seeds. Flax varieties adapted to local climate conditions have breeded but up to now the profound research of its quality was not carried out. In our investigation we analysed flax varieties of Latvia selection for seed yield and quality in comparison with standard varieties ‘Vega 2’ and ‘Lirina’. In Latgale Agricultural Scientific Centre 10 Latvian flax varieties are cultivated and seed yield, 1000-seed weight, seed oil content (extracted by hot pressing method) and fatty acid content in flax seed oil (detected with gas chromatography method) have evaluated. Seed yields of fibre flax Latvian varieties are significantly higher in comparison with standard variety ‘Vega’. All analysed seed samples have high oil content (27- 47%) and there is high percentage of polyunsaturated fatty acids in oil (linoleic acid 10,6-16,9%, linolenic acid 54,7-62,1%). There is little difference in 1000-seed weight, content of oil in seeds, percentage of linoleic, linolenic, oleic, palmitic and stearic acid in oil between fibre flax and oil seed flax varieties. The difference between the varieties is more influential. Flaxes seeds from Latvian varieties are in high quality and can be used for food, medical and technical purposes.
7
Lee*, Sung Eun, Sang Gyu Lee e Chiwon W. Lee. "Plant Density Affects Yield and Quality of Confectionery Pumpkin Seeds". HortScience 39, n. 4 (luglio 2004): 802C—802. http://dx.doi.org/10.21273/hortsci.39.4.802c.
Abstract (sommario):
The influence of plant density on yield of three confectionery seed pumpkin accessions was investigated under non-irrigated field conditions. Seeds of Golden Delicious (GD), open-pollinated Chinese snow-white seed (CS), and a selection from Austrian hull-less (HL) pumpkin were planted 30, 60, and 90 cm apart in rows that were 127 cm apart with seedlings thinned to one plant per hill. Plants were grown from 23 May to 18 Sept. One fruit per plant was harvested from five plants for each of the three replications. The number of seeds (and dry weight of seed) per fruit were 242 (59 g), 304 (87 g), and 334 (106 g), respectively, at 30, 60, and 90 cm spacing for GD. The number of seeds (and dry weight of seed) per fruit were 219 (108 g), 266 (108 g), and 258 (106 g), respectively, at 30, 60, and 90 cm spacing for CS. The number of seeds (and dry weight of seed) per fruit were 376 (76 g), 404 (94 g), and 304 (82 g), respectively, at 30, 60, and 90 cm spacing for HL. Highest seed yield was at 60 cm plant spacing for CS and HL, whereas GD produced highest seed yield at 90 cm plant spacing. The differences in total seed yield, seed size, and confectionery seed quality, as influenced by plant density and seed source, were also characterized.
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Kano, Cristiaini, Antonio Ismael Inácio Cardoso e Roberto L. Villas Bôas. "Phosphorus rates on yield and quality of lettuce seeds". Horticultura Brasileira 30, n. 4 (dicembre 2012): 695–98. http://dx.doi.org/10.1590/s0102-05362012000400021.
Abstract (sommario):
Because of lack of information about phosphorus fertilization in lettuce from the standpoint of seed production, this study was undertaken. The work was carried out in Botucatu, São Paulo state, Brazil, from September 25, 2003 to February 19, 2004, in order to study the influence of crescents phosphorus rates on yield and quality of lettuce seeds, cultivar Verônica. The experimental design was randomized blocks with five treatments (0; 200; 400; 600 and 800 kg ha-1 of P2O5) and five replications. The following characteristics were evaluated: seed production per plant (g plant-1), number of seeds per plant and quality (percentage of germination and seed vigor). A linear increasing was observed on production and number of seeds per plant of lettuce with phosphorus rates, but these rates did not affect the seed physiological quality evaluated on weight of 1,000 seeds (average = 0.91 g), first count of germination (98%), standard germination test (99%), seed germination speed index (68.5), seedling emergence speed index (97.0) and emerged seedlings (49.3%).
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AJAY GUPTA, VlNOD KUMAR SHARMA, G.D. SHARMA e PANKAJ CHOPRA. "Effect of biofertilizer and phosphorus levels on yield attributes, yield and quality of urdbean (Vigna mungo)". Indian Journal of Agronomy 51, n. 2 (10 ottobre 2001): 142–44. http://dx.doi.org/10.59797/ija.v51i2.4992.
Abstract (sommario):
A field investigation was conducted at farmer's field during the rainy seasons of 2000 and 2001 to study the effect of bio-fertilizer inoculation and phosphorus fertilization on yield and quality of the cultivars of urdbean (Vigna mungo (L.) Hepper] 'UG 218' urdbean produced significantly higher podslplants, 1,000-seed weight, seed yield as well as straw yield over other 2 varieties. However, the protein content was higher in the seeds of 'Type 9'. The practice of seed inoculation with phosphorus-solubilising bacteria showed a significant increase in seed yield and its attributes as well as protein content and N and P uptake over uninoculated treatment. Re- sponse of crop to phosphorus fertilization was significant up to 60 kg P,Odha for seed and straw yields. Phos- phorus application also resulted in significant increase in seed protein content and N and P uptake in seed and straw.
10
Brkić, S., Z. Milaković, A. Kristek e M. Antunović. "Pea yield and its quality depending on inoculation, nitrogen and molybdenum fertilization". Plant, Soil and Environment 50, No. 1 (20 novembre 2011): 39–45. http://dx.doi.org/10.17221/3640-pse.
Abstract (sommario):
The influence of seed inoculation with a bio-preparation of nodule bacteria Rhizobium leguminosarum, fertilization of 0, 40, 80, 120 kg N/ha and molybdenum topdressing on the yield of green mass, dry matter, seed, average number of pods per plant, average number of seeds per pod, average nodule number per plant, nodule dry weight as well as plant and seed protein concentration were studied during the two years of investigations on two soils – Mollic Gleysols and Eutric Cambisols. The highest values of all investigated parameters were obtained in the inoculated seed variants with molybdenum application, except the average nodule number per plant where the highest values were achieved in variants without molybdenum. The effect of nitrogen fertilization depended on the soil type, i.e. its chemical properties. The largest number of the investigated parameters obtained the highest values as a result of fertilization with 40 kg N/ha on Mollic Gleysols (3.96% humus). Thus, seed yield was 4.02 t/ha, nodule dry matter 0.482 g per plant whereas seed protein concentration was 26.91%. The largest number of the investigated parameters on Eutric Cambisols (1.07% humus) obtained the highest values with fertilization of 80 kg N/ha where seed yield amounted to 3.65 t/ha, nodule dry matter 0.456 g per plant while seed protein concentration was 26.48%.
11
Wang, Yan, Jingjing Wang, Dali Chen, Zhenning Hui e Xiaowen Hu. "Shade Increased Seed Yield and Quality of Incarvillea sinensis var. przewalskii". Plants 12, n. 16 (14 agosto 2023): 2934. http://dx.doi.org/10.3390/plants12162934.
Abstract (sommario):
Incarvillea sinensis var. przewalskii has attracted great attention because of the anticancer value of its alkaloids and the potential use of the species for ecological restoration. However, the scarcity of high-quality seeds has significantly hindered the cultivation and efficient utilization of this species. Understanding how seeds respond to maternal environmental conditions is crucial for developing high-yield and top-notch seed accessions, but the available knowledge in this area is limited. Here, we determined the effect of shading treatments on seed development, seed quality, and yield. Compared to the control, shade significantly increased the seed germination rate and 1000-seed weight by 29.2% and 25.6%, respectively. Regardless of light conditions, the seed germination rate and 1000-seed weight decreased by 7.13% and 37.5%, respectively, as the fruit positioned from base to apical. The seed yield per plant was 27.9% higher under shade than under the control treatment. The structural equation model showed that shade promoted seed yield through increasing flowers per reproductive branch and seed numbers per capsule. These findings suggest that adjusting shading conditions and optimizing inflorescence development can lead to high-yield and high-quality seeds. Additionally, prioritizing the number of flowers per reproductive branch and seeds per capsule in breeding programs can further enhance the seed yield of I. sinensis var. przewalskii.
12
Yesmina, Shahnaj, Moushumi Akhtarb e Belal Hossain. "Yield and Seed quality of barley (Hordeum vulgare L.) as affected by variety, nitrogen level and harvesting time". JOURNAL OF ADVANCES IN AGRICULTURE 2, n. 2 (18 giugno 2014): 93–100. http://dx.doi.org/10.24297/jaa.v2i2.4250.
Abstract (sommario):
The experiment was conducted to find out the effect of variety, nitrogen level and harvesting time on yield and seed quality of barley. The treatments used in the experiment consisted of two varieties viz. BARI Barley 4 and BARI Barley 5, three harvesting time viz. 35, 40 and 45 Days after Anthesis (DAA) and nitrogen levels viz. 0, 70, 85 and 100 kg N ha-1 . The experiment was laid out in a spilt- spilt-plot design with three replications assigning the variety to the main plot, harvesting time to the sub-plots and nitrogen level to the sub-sub plots. Variety had significant effects on the all yield attributes except fertile seeds spike-1 . Seed quality parameters viz. normal seeds spike-1 , deformed seeds spike-1 , germination (%) and vigour index were statistically significant. The variety BARI Barley 5 produced higher grain yield and seed quality than BARI Barley 4. Grain yield from BARI Barley 5 and BARI Barley 4 were 4.59 t ha-1 and 4.24 t ha-1 , respectively. Significantly, the highest 1000-seed weight (46.90 g) was produced by BARI Barley 5 than (37.90 g) BARI Barley 4. The result revealed that harvesting time had significant effect on yield and yield attributes and seed quality parameters. Seed yield was highest (4.65 t ha-1 ) when the crop harvested at 40 DAA and it was increased linearly from 35 DAA. Maximum quality seed and 1000-seed weight (43.20 g) was obtained when the crop harvested at 40 DAA. All the yields, yield attributes and seed quality parameters were significantly influenced by nitrogen levels. The highest grain yield (5.14 t ha-1 ) was obtained when BARI Barley 5 variety was fertilized by 100 kg N ha-1 and the lowest (3.14 t ha-1 ) was obtained from control treatments. Normal seeds spike-1 , vigour index, germination (%) were better at 85 kg N ha-1 in variety of BARI Barley 5 than BARI Barley 4. So it can be concluded that BARI Barley 5 showed better result when fertilized with 100 kg N ha-1 and harvested at 40 DAA for getting maximum yield and 85 kg N ha-1 and harvested at 40 DAA for getting better quality seed.
13
May, W. E., H. A. Loeppky, D. C. Murrell, C. D. Myhre e J. J. Soroka. "Preharvest glyphosate in alfalfa for seed production: Effect on alfalfa seed yield and quality". Canadian Journal of Plant Science 83, n. 1 (1 gennaio 2003): 189–97. http://dx.doi.org/10.4141/p01-196.
Abstract (sommario):
Preharvest applications of glyphosate have been shown to be effective in controlling Canada thistle in annual crops, but may reduce alfalfa seed yield depending on time and rate of application. The objective of this study was to determine the effect of preharvest applications of glyphosate on subsequent alfalfa seed yield and quality. The effects of timing, 1, 26, 51 and 76% alfalfa seed pod maturity, and rate, 0, 440, 880, 1320, and 1760 g a.i. ha-1, of a preharvest application of glyphosate on alfalfa seed yield and quality in the year of application, and regrowth and seed yield in the following year were determined. The rate of glyphosate applied did not affect seed yield in the application year; however, in the following year, growth and seed yield were reduced as rates increased. Delaying the application of glyphosate increased seed yields in the application year, but decreased alfalfa regrowth and flowering the following year. Germination and seedling emergence were not affected by the rate or timing of the glyphosate. A preharvest application of glyphosate at 1760 g a.i. ha-1 at 76% pod maturity is a viable option in the last year of seed production. Key words: Alfalfa (Medicago sativa L.), glyphosate, abnormal seeds, seed quality, and seedling vigour
14
Bhardwaj, Harbans L., e Anwar A. Hamama. "Yield and Nutritional Quality of Canola Sprouts". HortScience 42, n. 7 (dicembre 2007): 1656–58. http://dx.doi.org/10.21273/hortsci.42.7.1656.
Abstract (sommario):
In recent times, the use of sprouted seeds has become popular in human diets. Considerable information is available in the literature about various types of sprouts such as alfalfa, mungbean, and radish. However, information about canola (Brassica napus L.) sprouts, an oilseed crop that is receiving serious consideration as a source of domestic oil for human consumption, is lacking. We studied the composition traits of sprouts made from four canola cultivars (‘Banjo’, ‘KS8200’, ‘KS8227’, and ‘Virginia’) grown at three locations (Orange, Petersburg, and Suffolk) in Virginia for two crop seasons (2001 to 2002 and 2002 to 2003). Two 20-g seed samples (two replications) of each cultivar × location combination were sprouted for 6 d in the laboratory using tap water. Sprouting of canola seeds increased the weight 5.6 times over the original seed weight. Canola sprouts, on average, contained 27.3% oil, 25.1% protein, and 10.8% crude fiber on dry weight basis. Fresh yield of canola sprouts, from 20-g seed, averaged 111.1 g, whereas moisture content averaged 80.3%. Effects of cultivars on fresh sprout yield and moisture content were not significant. Locations where seeds were grown had significant effects on all traits of canola sprouts except for fresh sprout yield. Canola sprouts made from seed of ‘Virginia’ cultivar had the highest protein content (26.2%), whereas those made from seeds of ‘KS8227’ cultivar had the highest oil content (28.7%). Based on traits under study, canola sprouts compared well with alfalfa, brussel sprouts, mungbean, and radish sprouts for overall nutritional quality.
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Demari, Gustavo Henrique, Ivan Ricardo Carvalho, Tamires Silva Martins, Vinícius Jardel Szareski, Francine Lautenchleger, Murilo Vieira Loro e Velci Queiróz Souza. "Cutting management of dual purpose wheat and implications on seed quality". Agronomy Science and Biotechnology 8 (12 agosto 2022): 1–10. http://dx.doi.org/10.33158/asb.r170.v8.2022.
Abstract (sommario):
The nutritive value of a dual purpose forage, its structural and morphological composition, seed production capacity are determining characteristics in the selection of a genotype. The objective of this work was to evaluate the effect of cutting management on yield components, physiological quality of the seeds in the subsequent generation. Experiment I: the field cutting management was performed, and the yield components and the physiological quality of the seeds were evaluated. Experiment II: where the components of plant yield and physiological quality of the seeds were evaluated. The cutting managements affect the components of yield, such as thousand seed weight and seed mass per cob, as well as germination, first germination count and seedling dry mass of dual purpose wheat. In the generation that evaluates the quality of the seeds produced, the cuts do not influence the physiological quality of the seeds, however, they affect the yield components, number of cobs per plant, one thousand seed weight and seed mass per cob.
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Liubych, V. V. "TECHNOLOGICAL EVALUATION OF SOYBEAN SEED QUALITY DEPENDING ON THE VARIETY". Bulletin of Uman National University of Horticulture 2 (dicembre 2020): 32–37. http://dx.doi.org/10.31395/2310-0478-2020-2-32-37.
Abstract (sommario):
The biochemical component (protein content and fat content) of soybean seed, yield and fat and protein yield significantly depends on weather conditions and variety. It was found that the protein content in soybean seed, on average over two years of research on new varieties can vary from 36.1 to 44.4 %. Khana, Lenka and Alaska varieties have the highest protein content in soybean seed – 43.4–44.4 %. Protein content significantly depends on the weather conditions of the study year. Thus, soybean varieties of Kofu, Siberia, Volta, Asuka, Arisa, Khana, Lenka and Alaska, grown in 2020, have this figure 10–19 % higher than in 2019. In the seeds of Nordica, Carra, Kyoto, Ezra, Amadeus and Taurus soybean varieties, the protein content is 4–10 % lower. On average, over two years of research, the fat content in soybean seeds varies from 18.9 to 21.7 % depending on the variety. Only three out of 14 soybean varieties have the fat content ≤ 20.0 % – Khana, Alaska, Arisa. In seeds of other varieties, this figure is ≥ 20 %. Weather conditions reduce the fat content in the seeds by 7–20 % depending on the variety. Studies have shown that soybean seed yields vary significantly depending on the soybean variety. Thus, on average over two years of research, this figure varies from 1.30 t/ha in Amadeus variety to 1.88 t/ha in Siberia one. The highest yields (≥ 1.70 t/ha) were formed by Arisa, Volta and Siberia varieties. However, this figure varies greatly depending on the weather conditions of the study year. Thus, in a more favourable 2019, the yield is from 1.65 to 2.41 t/ ha, depending on the soybean variety. Moisture deficiency and small reserves of moisture in the deeper layers of the soil reduce seed yield from 0.95 to 1.35 t/ha or by 1.7–3.7 times, depending on the soybean variety. Two soybean varieties (Arisa, Siberia) have the highest protein yield at the level of 706–721 kg/ha. The highest fat yield was obtained by Siberia growing – 415 kg/ha. Under the conditions of the Right Bank forest-steppe, for stable formation of high protein yield in different weather conditions, it is necessary to grow Arisa soybean variety which has high protein content and high seed yield, and Alaska variety which has high protein content in seeds. In addition, in the best hydration years it is able to form a high fat yield. Volta, Asuka, Khana and Lenka varieties should be grown in years with sufficient moisture, as they provide the highest protein yield. These varieties should also be grown to obtain a high fat yield under the best moisture conditions. Siberia soybean should be used to produce fat in different weather conditions
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Motsenbocker, Carl E., e David H. Picha. "TRIPLOID WATERMELON YIELD AND QUALITY COMPONENTS". HortScience 28, n. 5 (maggio 1993): 480b—480. http://dx.doi.org/10.21273/hortsci.28.5.480b.
Abstract (sommario):
Twenty-seven triploid watermelon cultivars and/or breeding lines were evaluated for yield and quality components. Total yield, rind thickness, mature and immature seed count, incidence of hollow heart, soluble solids, sugars, pH, titratable acidity, and internal color were measured for each cultivar/breeding line. Yields ranged from 32,000 to 66,000 kg per hectare. `Jack of Hearts' was the highest yielding cultivar. Hollow heart was moderate to severe in five of the genotypes. Except for two breeding lines, soluble solids were at least 11 per cent. Rind thickness ranged from 15.0 to 22.2 mm. Little or no mature seed was present in most of the genotypes. The cultivar `Millionaire' and the CLF breeding lines, with the exception of CLF 1016, contained the most mature seeds. A range of internal color and individual sugar content (fructose, glucose, sucrose) existed between genotypes.
18
Oliva, Ruben N., Tahar Tissaoui e Kent J. Bradford. "Relationships of Plant Density and Harvest Index to Seed Yield and Quality in Carrot". Journal of the American Society for Horticultural Science 113, n. 4 (luglio 1988): 532–37. http://dx.doi.org/10.21273/jashs.113.4.532.
Abstract (sommario):
Abstract Carrot (Daucus carota L. cv. Danvers) seed were produced at plant spacings of 0.05, 0.10, 0.20, and 0.30 m in 0.80-m rows to give populations of 25, 13, 6, and 4 plants/m2. Samples from the adjacent commercial carrot seed field provided an additional density of 36 plants/m2. Seed yield, harvest index, and seed quality were evaluated with respect to umbel order and plant density. Phenological development was unaffected by plant density, but plant height increased significantly as density increased. The number of umbels per plant and the number of seeds per umbel decreased with increasing plant density, while seed weight was unaffected. The proportion of the seed contributed by primary umbels increased from 20% at the lowest to 60% at the highest density. Seed yield per plant declined continuously as population increased, but seed yield per unit area increased to a maximum at 12 plants/m2, then declined. Total biological yield (above-ground biomass) rose to a plateau level with increasing plant population. Ceiling biological yield coincided with maximum seed yield. Seed quality within each umbel order, assessed by germination percentage and rate, seedling growth, embryo length, and abnormal or embryoless seeds, was unaffected by plant density, but consistently decreased from primary to tertiary umbel orders. Harvest index (seed yield/biological yield) was highly correlated with seed quality. The relationship between harvest index and plant density in carrot seed production may be useful in optimizing plant populations for maximum seed yield and quality.
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Tavares, Lizandro Ciciliano, Cassyo Araújo Rufino, Sandro de Oliveira, André Pich Brunes e Francisco Amaral Villela. "Treatment of rice seeds with salicylic acid: seed physiological quality and yield". Journal of Seed Science 36, n. 3 (9 settembre 2014): 352–56. http://dx.doi.org/10.1590/2317-1545v36n3636.
Abstract (sommario):
Seed treatment with growth regulators, especially salicylic acid, is a promising alternative to the seed industry because it is an important inducer of resistance to diseases and pests, as well as acting significantly on quality and seed yield. The objective of this study was to evaluate the performance of rice seed treated with different concentrations of salicylic acid, as well as assess the crop yield and seed quality. The treatments consisted of increasing levels of 0, 50, 100, 150 and 200 mg.L-1 salicylic acid. To this was prepared a stock solution of salicylic acid and the highest concentration by successive dilution in distilled water, the other concentrations were obtained. The physiological quality of seeds produced was treated and evaluated by tests of vigor and germination, and after harvest were evaluated seed yield. It follows that treatment of rice seeds with salicylic acid concentrations up to 130 mg.L-1 at a dose of 2 mL.kg-1 seed does not affect the germination and affects the strength, however provides substantial increases in the yield of seeds. The seed treatment with salicylic acid has no influence on seed quality produced.
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Gan, Y., P. Jayakumar, R. P. Zentner e C. L. McDonald. "Selection for seed size and its impact on grain yield and quality in kabuli chickpea". Canadian Journal of Plant Science 86, n. 2 (5 maggio 2006): 345–52. http://dx.doi.org/10.4141/p05-113.
Abstract (sommario):
Seed cost is a major input expense for the production of kabuli chickpea (Cicer arietinum L.) due to its large seed size. Use of small seeds could reduce production costs because a lower volume of seeds would be needed per unit area. This study determined the effects of seed size, and selective use of small seeds, year after year, on the field performance of kabuli chickpea in Swift Current, Saskatchewan from 2000 to 2003. Separated large (9.1–11.0 mm diameter) and small (8.1–9.0 mm) seeds of certified CDC Xena were compared with the original, unseparated seeds during the 4-yr study period. Also, small seeds separated from small-seeded previous crops and large seeds separated from large-seeded previous crops were compared with the respective generations of unseparated seeds. Year significantly affected plant biomass, seed yield, and the proportion of ≥ 9-mm-diameter seeds (9DSeeds) in the harvested seed lot, and crops grown from large and small seeds separated from the original seed lot (i.e., 1st year of separation) did not differ in a given year. The 2nd year of selection for small seeds affected seed yield and 9DSeeds, although the effect was minimal. With 3 consecutive years of selection, small seeds lowered seed yield by 23% and decreased 9DSeeds by 10% compared with the unseparated seeds. Selective use of large seeds improved biomass, but did not increase seed yield or 9DSeeds compared with the unseparated seeds. Small seeds of a certified kabuli cultivar can be selectively used for up to 2 consecutive years before incurring a yield penalty, but the use of small seeds will decrease the percentage of large seeds in the harvested seed lot. Key words: Seed weight, selection pressure, Cicer arietinum L.
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Imura, Yoshimi, Ichiro Nakamura, Weenaporn Juntasin, Mohammad Amzad Hossain, Sarayut Thaikua, Rattikan Poungkaew e Yasuhiro Kawamoto. "Effects of Harvesting Method on Seed Yield and Seed Quality in Urochloa ruziziensis (cv. ‘OKI-1’ and cv. ‘Br-203’)". Agronomy 14, n. 3 (29 febbraio 2024): 509. http://dx.doi.org/10.3390/agronomy14030509.
Abstract (sommario):
Two field trials were conducted in Northern Thailand from 2018 to 2020 to determine the best manual harvesting method for maximizing seed yield and seed quality of two Urochloa ruziziensis cultivars, cv. OKI-1 and cv. Br-203. Four manual seed harvesting methods were implicated in a randomized complete block design with four replicates. The four methods were as follows: knocking seeds from seedheads into a nylon net receptacle and collecting them once every day (T1); knocking seeds from seedheads into a nylon net receptacle and collecting them once every three days (T2); allowing ripe seeds to fall into a nylon net sheet that was stretched as a receptacle beneath the seedheads and collecting seeds once every five days (T3); and covering the tied seedheads with a nylon net bag and collecting seeds once every five days (T4). The highest pure seed yield was obtained from T3 in cv. Br-203 (333.11 kg/ha), as well as the highest trend in cv. OKI-1 (534.67 kg/ha). T3 produced 22–46% and 11–27% more pure germinated seed yields than the other methods in cv. Br-203 and cv. OKI-1, respectively. As a result, T3 was recommended for higher seed yield, convenient seed harvest, and reduced manual seed harvest time.
22
Gan, Yantai, Alan D. Iwaasa, Myriam R. Fernandez e Ray McVicar. "Optimizing harvest schemes to improve yield and feeding quality in chickpea". Canadian Journal of Plant Science 88, n. 2 (1 aprile 2008): 275–84. http://dx.doi.org/10.4141/cjps07066.
Abstract (sommario):
Late maturity often causes substantial losses in yield and quality of chickpea (Cicer arietinum L.) in the short growing season in western Canada. This study determined optimum harvest management practices to minimize losses due to late maturity. Kabuli chickpea was grown in southwestern Saskatchewan from 2002 to 2004, and seed and straw were harvested with various harvest management practices. Seed yield in 2004 was higher compared with 2002 and 2003, but the 2004 seed samples had a high percentage of shrivelled and green seeds. Seed yield, weight per seed and harvest index (HI) were highest when the crop was directly combined at natural maturity either before or after a killing (-5°C) frost. On average, swathing at early or late maturity stages decreased seed yield, weight per seed and HI significantly compared with direct combine practices. Seeds from the swathing treatments had high percentages of green and shrivelled seeds with high levels of fungal colonization. Both seed and straw from swathing had the poorest feeding quality measured as neutral detergent fibre, acid detergent fibre, and organic matter content and digestibility. Desiccation of chickpea plants with Reglone or low dosages of glyphosate when 80% of pods had turned colour did not advance plant maturity, nor did they affect seed yield or HI compared with direct combine practices. It is concluded that in the short growing season in western Canada, harvest of chickpea at natural maturity either prior to or after a killing frost may optimize the seed yield and quality. Regardless of harvest practices, the quality of both seed and straw in chickpea may be suitable as salvage feed materials for beef livestock. Key words: Cicer arietinum, desiccation, direct-combine, maturity, glyphosate stress, swath, salvage feed
23
Shamsul Huda, Muhammad, Mohammad Rafiqul Islam, Abdul Hannan, Shafiqul Islam e Sheikh Md Mobarak Hossain. "SEED QUALITY ASSESSMENT OF FARMER’S PRODUCED SEED POTATO". Plant Physiology and Soil Chemistry 1, n. 2 (13 settembre 2021): 41–44. http://dx.doi.org/10.26480/ppsc.02.2021.41.44.
Abstract (sommario):
The experiment was conducted at the research field and post graduate laboratory of Plant Pathology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur, during 2015 – 2016 to find out suitable method of farm saved seed potato production by the farmers. Farm saved seed was compared with certified seed, positive selection seed, seed plot technique’s seed and TLS seeds potato in the experiment. The maximum yield (27.72 ton/ha) was recorded from Positive Selection’s Seeds which was similar with Certified and Seeds of SPT. But the maximum plants (≥ 8 %, 7.33 % and 4.17 %) were infected by PVY, PLRV and PMV respectively in Farmer’s seed. The seed potatoes of positive selection and seed plot technique are the best alternate to supplement the certified seed.
24
C, DHARMALINGAM, e BASU R.N. "DETERMINING OPTIMUM SEASON FOR THE PRODUCTION OF QUALITY SEEDS IN MUNGBEAN". Madras Agricultural Journal 80, December (1993): 684–88. http://dx.doi.org/10.29321/maj.10.a01721.
Abstract (sommario):
The monthly sowing studies carried out with mungbean cultivar CO 3 for one year (January to December) under coimbatore conditions had brought out the need for sowing the seed crops during the summer months namely, from February to April for getting higher seed yield associated with larger recovery of quality seeds. The hard seed percentage however was more in the produce of the resulting crop. On the other hand, seed crops raised during May to December resulted in low seed yield combined with larger percentage of off-colour seeds which on the seed quality point of view needs to be eliminated.
25
Adhithya, G., R. Siddarju, Parashivmurthy ., T. M. Ramanapa, K. Vishwanath, U. Tejaswini e S. Sowjanya. "Influence of Seasons and Nutrient Invigoration on Seed Quality in Greengram". International Journal of Plant & Soil Science 35, n. 3 (1 marzo 2023): 106–19. http://dx.doi.org/10.9734/ijpss/2023/v35i32781.
Abstract (sommario):
The influence of seed invigoration on seed yield and quality was studied in two seasons, i.e., summer and kharif. Among the seasons studied, seed quality parameters significantly differed for both seasons. Summer recorded the highest values in growth and yield parameters, viz., field emergence and plant population at harvest (91.75 and 87.75 %, respectively), number of nodules (35.71), seed yield (q/ha) (3.49), and seed quality parameters, viz., seed germination (%) (g) (91.7), and seedling vigour index I and II (3392 and 2252, respectively). But the lowest hard seeds were recorded in kharif (71.71%). Among treatments studied, 1 % ZnSO4 recorded the highest values in growth and yield parameters, viz., field emergence and plant population at harvest (96.50 and 91.17 %, respectively), number of nodules (38.50), pod length (cm), and number of seeds per pod (11.00 and 12.23, respectively). also in seed quality parameters, viz., seed germination (%) and 100 seed weight (g) (94.7 and 3.78, respectively), shoot length and root length (25.93 and 14.51 cm, respectively), mean seedling length (cm) and mean seedling dry weight (mg) (40.44 and 278, respectively), seedling vigour index I and II (3829 and 2636, respectively), and total dehydrogenase activity (A480nm) (1.825).
26
Merfield, C. N., J. G. Hampton, S. D. Wratten, P. Prapanoppasin e P. Yeeransiri. "The effect of plant density on seed yield and quality of carrot (Daucus carota L.)". NZGA: Research and Practice Series 14 (1 gennaio 2010): 75–83. http://dx.doi.org/10.33584/rps.14.2008.3183.
Abstract (sommario):
The hypothesis that by increasing carrot (Daucus carota) plant density the contribution to seed yield by the primary umbels would increase, and that therefore both seed yield and seed quality would increase, was examined in two experiments in different years in Canterbury. A radial trial design provided plant densities from 2 to 84 plants/m2 and from 4 to 100 plants/m2 in experiments one and two respectively. Seed yield increased with increasing plant density in both experiments, and at the highest density the primary umbels contributed 90% (experiment one) and 60% (experiment two) of the seed yield. In both experiments seeds from the primary umbels had a greater thousand seed weight and higher germination than those from the other order umbels, and for the second experiment they also had higher seed vigour. The quality of seeds from the primary umbels was consistently higher than that of seeds from the secondary umbels across all plant densities, and for the latter, both germination and seed vigour declined as plant density increased. These results therefore support the hypothesis, and densities higher than the 20 plants/m2 currently used commercially have the potential to increase both seed yield and quality. Keywords: seed production, primary umbels, germination, vigour, plants/m2
27
Noor, Anam, Khurram Ziaf, Muhammad Naveed, Khuram Shehzad Khan, Muhammad Awais Ghani, Iftikhar Ahmad, Raheel Anwar, Manzer H. Siddiqui, Amir Shakeel e Azeem Iqbal Khan. "L-Tryptophan-Dependent Auxin-Producing Plant-Growth-Promoting Bacteria Improve Seed Yield and Quality of Carrot by Altering the Umbel Order". Horticulturae 9, n. 9 (22 agosto 2023): 954. http://dx.doi.org/10.3390/horticulturae9090954.
Abstract (sommario):
Carrot (Daucus carota L.) seed quality is affected by umbel position due to uneven maturation of carrot seeds produced in different umbel orders. However, keeping this in view, we tested whether seed quality could be improved with the suppression of tertiary umbels under exogenous auxin application. Using auxin-producing bacterial isolates, i.e., Bacillus sp. MN54, Enterobacter sp. MN17, Pantoea sp. MN34, and Burkholderia phytofirmans PsJN, the arrangements of carrot umbel order were evaluated in terms of quality carrot seed production. The results revealed that auxin production by plant-growth-promoting rhizobacteria showed significant differences among measured growth indices, yield, and seed quality attributes. The selected endophytic strains co-applied with auxin via foliar application improved all growth- and yield-related traits, as well as the enzymatic activities of carrots. Noticeably, MN17+L-tryptophan and MN34+L-tryptophan effectively minimized the number of tertiary umbels by increasing the number of secondary umbels. Furthermore, treating with PsJN+L-tryptophan and MN34+L-tryptophan resulted in reduced conductivity of seed leachates and malondialdehyde levels in primary, secondary, and tertiary umbel seeds. These findings collectively indicate the potential of the foliar application of PsJN+L-tryptophan and MN34+L-tryptophan to effectively alter umbel arrangement, leading to improved yield and seed quality. This study implies that carrot seed producers can consider employing specific PGPB strains, particularly MN34+L-tryptophan, to suppress tertiary umbels and achieve higher yields of high-quality carrot seeds.
28
Alam Sarker, Mohammad Saiful, Ariful Islam, Md Moniruzzaman, Muhammad Delwar Hossain Sarker e Md Zablul Tareq. "EFFECT OF GEOGRAPHIC LOCATION ON YIELD AND QUALITY OF SEED OF BJRI TOSSA PAT-8". Tropical Agrobiodiversity 4, n. 1 (2 febbraio 2023): 27–29. http://dx.doi.org/10.26480/trab.01.2023.27.29.
Abstract (sommario):
The experiment was conducted in two locations namely Manikganj and Noakhali to evaluate the effect of geographic position on the performance of seed yield and yield contributing characters of BJRI Tossa Pat-8. The result of data analysis revealed that the seed yield of BJRI Tossa Pat-8 in Manikganj (7.30g) was higher than the yield of Noakhali (5.63g). On the basis of morphology such as plant height, top diameter, base diameter, capsule length, number of seeds/pod, number of pods/plant & number of branches/plant, superior performance of Manikganj was observed to Noakhali. It was worth noticing that germination percentage of seeds of Manikganj (95%) was overwhelmingly higher than the seeds of Noakhali (84%). Geographic position also exerts significant effect on seed emergence and 1000 seed weight. Seeds harvested from Manikganj witnessed 90% of field emergence in contrast to only 72% in Noakhali. Similarly, a significant difference in 1000 seed weight was observed, 1000-seed weight of the seeds of Manikganj and Noakhali were 2.098g and 1.892g respectively.
29
Nemeskéri, E., e L. Nagy. "Influence of growth factors on the yield and quality of dry beans". Acta Agronomica Hungarica 51, n. 3 (1 novembre 2003): 307–14. http://dx.doi.org/10.1556/aagr.51.2003.3.8.
Abstract (sommario):
investigations were made on the relationship between plant density and plant height, and on the yield, thousand seed mass, and ratio of diseased and broken seeds of varieties with different seed sizes. Experiments were carried out to analyse the effects of potassium on the yield, bacterial diseases and nutritive quality of the seed of bean varieties. Three dry bean cultivars representing the small, medium and large seed size groups were investigated. Six plant density treatments were chosen based on theoretical seed norms, taking the germinative value of the seeds into consideration. The correlation between plant density and yield average showed that the volume of yield increased for varieties with large and medium-sized seeds up to a plant density of 285-400 thousand/ha, after which it declined. On the basis of the results, yield averages at plant densities of 285-334 thousand plants/ha were 0.17 t/ha higher than those achieved at low density (200 thousand plants/ha). At greater plant density the plant height increased in the case of large-seeded varieties and there was a considerable decrease in the thousand seed mass. With an adequate water supply a high level of potassium decreased the number of pods and seeds per plant compared with the basic level, which gave a yield of 2.5 t/ha. The use of high rates of potassium fertilizer decreased the number of infected seeds, but the differences were only significant for the small-seeded variety. A moderately high potassium level was advantageous for food quality, particularly during drought.
30
Jacob Junior, Elias Abrahão, Liliane Márcia Mertz, Fernando Augusto Henning, Isabel Rodríguez Quilón, Manoel de Souza Maia e José Maria Duran Altisent. "Changes in canola plant architecture and seed physiological quality in response to different sowing densities". Revista Brasileira de Sementes 34, n. 1 (2012): 14–20. http://dx.doi.org/10.1590/s0101-31222012000100002.
Abstract (sommario):
The aim of this study was to evaluate changes in canola yield components and seed physiological quality in response to different sowing densities. The study was made in a greenhouse at the REIPESOL Company Technological Center, Madrid - Spain, with the commercial "Toccata" hybrid variety. The initial sowing density was 360,000 plants/ha and the plant population was later thinned down to include treatments of 250 and 180 thousand plants/ha. Harvested seeds were sent to the Seed Technology Center Laboratory (CATES) at the Madrid Polytechnic University (UPM) to evaluate changes in plant architecture and yield components, as well as the seed physiological quality of different plant parts. Results demonstrated that canola plants showed changes in morphology and yield components in response to different sowing densities. The population of 250,000 plants/ha showed the best seed yield demonstrating that maximum yield is directly related to a correct sowing density. The number of pods/plant was the most important component for increased seed yield/plant and seed yield/area. The spatial distribution of canola seeds in the plant and canola sowing density did not affect seed physiological quality.
31
Sandral, GA, BS Dear e NE Coombes. "Differential tolerance of Trifolium subterraneum L. (subterranean clover) cultivars to broadleaf herbicides. 2. Seed yield and quality". Australian Journal of Experimental Agriculture 35, n. 4 (1995): 475. http://dx.doi.org/10.1071/ea9950475.
Abstract (sommario):
The effect of broadleaf herbicides on seed set by Trifolium subterraneum (subterranean clover) cultivars was examined at 2 sites (Wagga Wagga and Canowindra) over 2 years. Five commonly used herbicide treatments (bromoxynil, MCPA, 2,4-DB, MCPA + terbutryn, MCPA + diuron) were applied at 2 rates to 7 cultivars of subterranean clover. Significant site x cultivar x herbicide interactions were observed. Seed yields were either unaffected or depressed by up to 66% at the higher rainfall site (Canowindra), whereas at the lower rainfall site (Wagga Wagga) some herbicide x cultivar combinations showed increases in seed yield up to 115%. The increase in seed yield was greater at the lower herbicide rate. The variation in seed yield with herbicide treatment was largely a result of a change (P<0.001) in the number of seeds set (R = 0.94 at Wagga Wagga; R = 0.85 at Canowindra). Seed size was also correlated (P<0.001) with seed yield at both sites but explained less of the variation (R = 0.23 at Wagga Wagga; R = 0.47 at Canowindra). The reduction in herbage yield as a result of herbicide application was a poor indicator of the subsequent seed yield response at both sites. Cultivar Trikkala was consistently most tolerant to the herbicide treatments, showing either no change in seed yield at the wetter site or large increases in seed yield at the lower rainfall site. In contrast, the seed yield of Dalkeith was depressed by 2,4-DB at both sites in both years by 39-66%. Increases in seed yield, which were most pronounced in cultivars of midseason maturity (Trikkala, Junee, Seaton Park) and least in later maturing cultivars (Karridale, Clare) and in the very early flowering Dalkeith, were attributed in part to a water-saving effect of the herbicide treatments. Cultivar maturity ranking was negatively correlated (P<0.001) with seed yield (R=-0.73 at Wagga Wagga; R=-0.45 at Canowindra). The germination percentage of seed produced by the cultivars was unaffected by herbicide treatment, although the number of abnormal radicles formed by germinating seed was higher in the 2,4-DB and MCPA treatments.
32
PRASAD, BIRENDRA, RAJENDRA PRASAD, SHAMBHOO PRASAD e SUNIL KUMAR. "Effect of pre-sowing seed bio-inoculation on seed yield, its contributing characters and subsequent seed quality of barley (<i>Hordeum vulgare</i>)". Indian Journal of Agricultural Sciences 82, n. 11 (8 novembre 2014): 946–51. http://dx.doi.org/10.56093/ijas.v82i11.24965.
Abstract (sommario):
A study was carried out to examine the effect of pre-sowing seed inoculation with Pseuodomonas fluorescens and Trichoderma harzianum either singly (@ 4g, 6g, 8g per kg seed) or in combination with both bio-inoculants (@ (2+2)g, (3+3)g, (4+4) g/kg seed) on growth, seed yield and subsequent seed quality of barley. There was significant difference among different seed bio-inoculation treatment over un-inoculated control with regard to field emergence, root length, plant height, ear length, number of seeds per ear, 1000-seed weight and seed yield/ha under field trial and also for subsequent seed quality, i e germination, radicle, plumule and seedling length, fresh and dry weight of seedlings and vigour index (I&II) under laboratory experiment. Seed yield and its contributing characters as well as subsequent seed quality were found to be higher as the amount of P. fluorescens and T. harzianum increased from 4 to 8 g/kg either singly or in combination of both bio-inoculants. The bio-inoculants mixture showed greater influence on seed yield and quality over seeds treated either with P. fluorescens and T. harzianum and both bio-inoculants mixture @ (4+4) g/kg seeds had maximum influence on characters studies under field as well as laboratory experiment.
33
Surmacz-Magdziak, Agnieszka. "Influence of row spacing on herb yield of common chamomile (Chamomilla recutita (L.) Rausch.) as well as seed yield and quality". Acta Agrobotanica 64, n. 3 (2012): 35–38. http://dx.doi.org/10.5586/aa.2011.028.
Abstract (sommario):
The experiment consisted of three single row spacings (every 25, 40 and 50 cm) and four double and triple row spacings (40-25-40 cm, 40-25-25-40 cm, 50-25-50 cm, 50-25-25- 50 cm). The aim of the present experiment was to compare the influence of varying spacing on yields and quality of chamomile seeds. Among the row spacings under comparison, the highest seed and herb yields were achieved from the triple row spacing. 1000-seed weight was proportional to seed yield, and the seed germination capacity was not differentiated due to row spacings used. Plants growing in single rows every 25 cm formed the lowest number of branches terminated by flower heads, thus the herb and seed yields were the lowest.
34
Shaheb, MR, MN Islam, A. Nessa e MA Hossain. "Effect of harvest times on the yield and seed quality of French bean". SAARC Journal of Agriculture 13, n. 1 (15 luglio 2015): 1–13. http://dx.doi.org/10.3329/sja.v13i1.24175.
Abstract (sommario):
A two years field study was carried out in the research field and laboratory of Seed Technology Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh during rabi season of 2008-10. The aim of this study was to determine the effect of five different dates of harvest viz. H1: 65 Days after emergence (DAE), H2: 70 DAE, H3: 75 DAE, H4: 80 DAE and H5: 85 DAE on the seed yield and viability of French bean. The experiment was laid out in randomized complete block design (RCB) with four replications. Results showed that the yield and yield contributing parameters significantly influenced the days to harvesting. The highest seed yields of 1.15 and 1.31 t ha-1 were obtained from the harvest of 75 DAE (Days after emergence) in 2008-09 and 2009-10, respectively. On the contrary, seed quality parameters like seed germination, root length and vigour index were also significantly influenced by harvest time. The highest seed germination percentage of 91.33 and 91.56 were recorded from the seed plots harvested at 75 DAE (pods are light brown with few yellow colour) both for the year 2008-09 and 2009-10, respectively. Similarly, the vigour indexes (12.49 and 11.64) were the highest in seed harvested at 75 DAE from the year of 2008-09 and 2009-10, respectively. This might be due to more food reserve and dry matter accumulation on the seed at later harvest. However, seeds harvested in 80 and 85 DAE were also found good for seed yield and seed quality.SAARC J. Agri., 13(1): 1-13 (2015)
35
DORDAS, C., G. E. APOSTOLIDES e O. GOUNDRA. "Boron application affects seed yield and seed quality of sugar beets". Journal of Agricultural Science 145, n. 4 (13 febbraio 2007): 377–84. http://dx.doi.org/10.1017/s0021859607006879.
Abstract (sommario):
SUMMARYSugar beet (Beta vulgarisL.) is one of the most important sugar crops worldwide. Despite the fact that sugar beet crop has high requirements for boron (B), the effect of B applications on seed yield and on seed quality is not known. A 2-year field study was conducted to determine whether soil and foliar B applications during anthesis increase seed set, final seed yield and improve seed quality of sugar beets. Boron solutions were applied at four rates (0, 245, 490 and 735 mg/l of B) as foliar applications and at two rates (1·5 and 3 kg/ha of B) as soil applications to field plots exhibiting no vegetative symptoms of B deficiency. Foliar B application increased the concentration of B in vegetative and reproductive tissues much more than soil application. In addition, foliar B application increased the seed yield by an average of 10% in the first year and by an average of 44% in the second year. The mean seed weight was affected by B application as it was increased in both years. The proportion of larger seeds (>5·00 and 4·5–5·00 mm) increased with increasing application of B. Moreover, seed quality was affected and the proportion of abnormal seedlings was decreased with B application. However, seed vigour was not affected by B application. These data indicate that foliar B application can improve seed yield and seed quality of sugar beet grown for seed production. However, the physiological basis of this effect remains unknown.
36
Bohnen, Julia L., e Anne M. Hanchek. "Flowering and Seed Yield in Three Species of Prairie Plants". HortTechnology 4, n. 3 (luglio 1994): 255–59. http://dx.doi.org/10.21273/horttech.4.3.255.
Abstract (sommario):
Production of native seeds and seedlings for landscaping and restoration is an expanding horticultural industry in Minnesota, but seed yields of many species from wild stands are often small and vary widely in quality. In this work, we document phenological development and seed yield in cultivated and prairie-grown plants for Tradescantia ohiensis Raf. (Ohio spiderwort), Dalea purpurea Vent. (purple prairie clover), and Spartina pectinata Link (prairie cordgrass) at the Minnesota Landscape Arboretum. For T. ohiensis, seed yield under cultivation was significantly greater than in the prairie both seasons, with 2.5 g of seed recovered per plant in 1993. Under cultivation, seed yield of established D. purpurea was triple that of the prairie, yielding 34 seeds per inflorescence. S. pectinata grown under cultivation from seedlings or rhizome divisions produced seed in the first and second seasons, respectively, while plants in the prairie remained vegetative. Two-year-old seedlings produced 38 seeds per spike. Field cultivation of these native plant species resulted in increased seed yield and improved growth, while allowing phenological monitoring and the use of species-specific harvest practices.
37
Sathya Sai Krishna K., Roshni Vijayan, Dijee Bastine, Vidhu Francis Palathingal e Moossa P. P. "Efficacy of Botanicals on Seed Quality Enhancement in Cowpea [Vigna unguiculata (L.) Walp.] on Yield and Yield Attributes". International Journal of Plant & Soil Science 35, n. 23 (15 dicembre 2023): 41–49. http://dx.doi.org/10.9734/ijpss/2023/v35i234214.
Abstract (sommario):
The field experiment was conducted at the Regional Agricultural Research Station, Pattambi of Kerala Agricultural University with the objective to understand the effect of seed treatment using different organic leaf extracts on the growth and yield of cowpea. The experimental design was used for the layout of the design in Randomized Block Design, with three replications and nine treatments. The experiment was conducted with 9 treatments viz., the 5% leaf extracts of Calotropis (T1), Pappaya (T2), Pongamia (T3), Castor (T4), Moringa (T5), Vitex (T6), Neem (T7), Tulsi (T8), Control with distilled water (T9). Different field observations revealed that the seed hardening significantly influenced the seed yield and yield contributing characters of cowpea. The highest yield was recorded due to seed hardening treatment with Pongamia 5% leaf extract (T3) for 4 hrs followed by Calotropis 5% leaf extract (T1) for 4 hrs. All the seed hardening treatments had significant effects on yield contributing characters like plant height at maturity, number of branches(primary and secondary) per plant, number of clusters per plant, number of seeds per pod, pod length, pod girth, pod weight, 100 seed weight, seed yield per plot(kg/ha) and dry matter production at harvest. The nodule count at flowering and total chlorophyll content at maturity were also found to be significantly different among the treatments. The seeds hardened with Pongamia leaf extract (5%) (T3) for 4 hrs recorded higher field emergence with maximum grain yield (716 Kg/ha), plant height at maturity (145.07 cm), number of primary branches per plant (3.60), seed yield per plant (g) (13.69 g), and seed yield (716 kg/ha) followed by Calotropis leaf extract (5%) (T1) for 4 hrs with a seed yield of 694 kg/ha.
38
Yalamalle, V. R., T. Arunachalam, R. Kumari, D. M. Ithape, S. Ghosh e M. Singh. "Ethephon Reduces Lodging and Enhances Seed Yield and Quality in Onion". International Journal of Bio-resource and Stress Management 11, n. 6 (31 dicembre 2020): 601–6. http://dx.doi.org/10.23910/1.2020.2132a.
Abstract (sommario):
Onion is an important vegetable crop grown in almost all parts of the World as a flavouring agent in food preparation. It is propagated by seeds and the seed crop is affected by several fungal, viral and bacterial diseases which cause lodging and reduces the seed yield and quality. Onion seed crop was sprayed with different concentration of ethephon (0, 100, 200, 400, 600, 800 and 1000 ppm) for two duration at 45 or 45+60 days after planting during (DAP) during 2018-19 and 2019-20 rabi seasons. The effect of ethephon on seed yield and seed quality was studied. In comparison to control ethephon application significantly reduced scape length and % lodging by 38.73% and 42.52% respectively. There was 31.90% and 89% enhancement in scape diameter and yield respectively. Ethephon spray also enhanced seed quality, highest germination and seed vigour was recorded in plants sprayed with 600 ppm ethephon at 45 and 60 DAP which was 19% and 51.65% higher than control. Highest seedling dry weight was observed in plants sprayed with 100 ppm ethephon at 45 DAP. Among the treatments, 100 and 200 ppm ethephon applied at 45 DAP had lower lodging and higher seed yield and seed quality. Hence spraying of onion seed crop with 100 ppm ethephon at 45 DAP is beneficial for getting higher seed yield and quality.
39
Lima, Márcio S. de, Antonio I. I. Cardoso e Marcelo F. Verdial. "Plant spacing and pollen quantity on yield and quality of squash seeds". Horticultura Brasileira 21, n. 3 (settembre 2003): 443–47. http://dx.doi.org/10.1590/s0102-05362003000300005.
Abstract (sommario):
Squash seeds yield and quality can be improved by proper population plant spacing and the pollen quantity, which influences the pollination quality and fertilization. Nine experiments were conducted as a factorial combination of three spacing between plants (0.8 x 0.3, 0.8 x 0.6 and 0.8 x 0.9 m), two quantities of pollen (50% of an anther and another entire one) and natural insect pollination. Seed and fruit production parameters, and seed quality were evaluated. A randomized complete block design, five replications, with ten plants per plot was adopted. Larger plant spacing increased the average number of mature fruits and seed yield per plant. Seed yield was directly proportional to the amount of pollen used during pollination. Higher amounts of pollen resulted in higher seed yield per area, but the plant spacing did not affect this characteristic. Manual pollination, using a whole anther, did not differ from natural pollination in relation to seed yield and quality.
40
Sokólski, Mateusz, Dariusz Załuski e Krzysztof Jankowski. "Crambe: Seed Yield and Quality in Response to Nitrogen and Sulfur—A Case Study in Northeastern Poland". Agronomy 10, n. 9 (21 settembre 2020): 1436. http://dx.doi.org/10.3390/agronomy10091436.
Abstract (sommario):
The aim of this study was to determine the effect of nitrogen (0, 30, 60, 90, 120 kg ha−1) and sulfur (0, 15, and 30 kg ha−1) fertilization on the morphometric parameters of plants, seed yield components, seed and straw yield, N fertilizer use efficiency (NFUE), and quality of crambe seeds. The experiment had a randomized complete block design, and it was carried out in Bałcyny (northeastern Poland) in 2017–2019. In northeastern Poland, the average seed yields ranged from 0.96 to 1.64–1.82 Mg ha−1 (hulled seeds). Seed yield increased significantly in response to 120 kg N ha−1 and 15 kg S ha−1. The NFUE of crambe decreased by 28% with a rise in N rate. Hulled crambe seeds accumulated 324–394 g kg−1 DM of crude fat, 208–238 g kg−1 DM of total protein, and 118–137 g kg−1 DM of crude fiber. Nitrogen fertilization decreased the crude fat content (by 6%), and it increased the total protein content (by 11%) and the crude fiber content (by 14%) of crambe seeds. Sulfur fertilization increased crude fat content (by 4–5%) without inducing significant differences in the total protein content and the crude fat content of seeds.
41
KRISHNAN, P., e A. V. SURYA RAO. "Effects of genotype and environment on seed yield and quality of rice". Journal of Agricultural Science 143, n. 4 (agosto 2005): 283–92. http://dx.doi.org/10.1017/s0021859605005496.
Abstract (sommario):
Seed yield and seed quality determine much of the value of rice (Oryza sativa L.) crops to the producers. The effects of genotype and environment on seed yield and quality were investigated using 12 rice genotypes grown during 3 years (2000–2003) at four different sowing dates in India, where detailed environmental data were collected. Yield, seed weight, proportion of seed setting and quality in terms of potential seed longevity, proportion of discoloured seeds, seed leachate conductivity and percentage germination were evaluated. The results were subjected to analysis of variance and the influence of environmental factors was evaluated by correlation analysis. Analysis of variance suggested that proportion of seed setting, seed leachate conductivity, potential seed longevity, percentage seed germination and proportion of seed discoloration were influenced more by environmental effects than by genotypic effects. In contrast, yield, panicle number, seed weight, and proportion of high-density grains were influenced more by genotypic than by environmental effects. The significant interaction effects of genotype and environment for all characteristics were attributed to differential resistance of genotypes to lodging (caused by increased plant height, low radiation and excessive rain at the time of grain filling) and were associated with fewer panicles harvested, lower seed setting and lower seed weight. Correlation analysis suggested that warm weather conditions with high solar radiation and without excessive rains during grain filling stage gave the best rice seed yield with high quality.
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UK Dubey, S Padmavathi e Ashok Kumar. "Effect of seed pelleting on growth, yield and seed quality parameters of black gram". Journal of Food Legumes 36, n. 4 (1 aprile 2024): 273–77. http://dx.doi.org/10.59797/jfl.v36.i4.163.
Abstract (sommario):
Seed pelleting involves encasing seeds in inert material using carefully chosen powder and liquid. This method facilitates enhancing seed placement, sowing, germination, and shields plants from various biotic and abiotic stresses. In the context of Indian agriculture, pulse production faces significant challenges due to low production and productivity. Therefore, seed pelleting holds immense promise in addressing these limitations. This study underscores the significance of seed pelleting concerning growth, yield, and quality parameters. The findings concluded that seeds treated with pelleting exhibited superior growth attributes, such as increased plant height, branch numbers, and higher dry matter production. Additionally, seeds pelleted with rhizobium displayed elevated levels of chlorophyll ‘a’, ‘b’, and total chlorophyll content. Furthermore, rhizobium-treated pelleted seeds demonstrated the highest yield compared to other treatments and the control group.
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Tran, Van Dung, Qui Nguyen Van, Khanh Tran Huynh, Tan Do Ba, Van Long Vu e Sashi Kazumichi. "Effects of pre-sowing seed treatments on rice yield, grain quality and soil chemical properties in salt-affected soils". Can Tho University Journal of Science 14, n. 1 (30 marzo 2022): 1–10. http://dx.doi.org/10.22144/ctu.jen.2022.001.
Abstract (sommario):
This study aimed to evaluate the effects of sowing density and iron (Fe) coated seeds on rice grain yield, grain quality, and soil properties in saline soils in Phuoc Long district, Bac Lieu province, Vietnam. Experimental treatments include: (T1) Intact dry seed (50 kg seed/ha); (T2) Hydro-primed seed (120 kg seed/ha); (T3) Hydro-primed seed (50 kg seed/ha); (T4) Hydro-primed then sprouted seed (50 kg seed/ha); (T5) Fe-coated dry seed (50 kg seed/ha); (T6) Fe-coated hydro-primed seed (120 kg seed/ha); (T7) Fe-coated hydro-primed seed (50 kg seed/ha); (T8) Fe-coated hydro-primed seed which was sprouted before sowing (50 kg seed/ha); (T9) Hydro-primed then sprouted seed (120 kg seed/ha); (T10) Transplanting (50 kg seed/ha). The results indicated that applying Fe-coated seeds significantly increased tiller number at 45 and 60 DAS compared to free-Fe-coated seeds and transplanting treatments. There was no significant difference in tiller number among treatments at harvest stage. The plant height, yield, amylose, protein contents, gel consistency, soil pH, Eh, and Fe content in soil solution among the treatments did not differ significantly. This study demonstrated that reducing seed rate, broadcasting dry seeds, and coating seeds with Fe could reduce production cost while plant growth, yield and grain quality are maintained.
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GOODING, M. J., A. PINYOSINWAT e R. H. ELLIS. "Responses of wheat grain yield and quality to seed rate". Journal of Agricultural Science 138, n. 3 (maggio 2002): 317–31. http://dx.doi.org/10.1017/s0021859602002137.
Abstract (sommario):
Four field experiments were conducted to investigate the effects of seed rate on yield and quality of wheat. Despite some small and inconsistent effects of seed rate on radiation-use efficiency and harvest index, the responses of PAR interception, above-ground biomass and grain yield generally followed similar asymptotic increases as seed rate increased. In one experiment, when nitrogen fertilizer was withheld, biomass and grain yields did not respond to increases in seed rate despite increases in PAR interception. In one experiment, grain yield followed a parabolic response to seed rate with apparent reductions in yield at very high seed rates. Plants compensated for low population densities by increased production and survival of tillers and, to a lesser extent, increased grain numbers per ear. Net tiller production continued until the main stems flowered or later. Effects of seed rate on grain specific weight and thousand grain weight were small and inconsistent. Hagberg falling number increased linearly with seed rate in three experiments, associated with quicker maturation of the crop. Grain protein concentration declined with increase in sowing rate according to linear divided by linear or linear plus exponential models depending on whether the grain yield response was asymptotic or parabolic. Discolouration of the grain with blackpoint increased with seed rate in the most susceptible cultivar, namely Hereward. The economic consequences of these effects on yield and quality are discussed.
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Ozenirler, Cigdem, e Kadriye Sorkun. "Increasing Carthamus Tinctorius L. Yield by Managed Bees". Alinteri Journal of Agriculture Sciences 36, n. 1 (22 giugno 2021): 362–67. http://dx.doi.org/10.47059/alinteri/v36i1/ajas21054.
Abstract (sommario):
Carthamus tinctorius L. (safflower) is a drought-tolerant plant that has been cultivated for its oil, carthamin pigment, and edible parts. Seed production by safflower is related to its pollination success. The aim of this study was to evaluate the effects of Apis mellifera L. (honey bee) and Bombus terrestris L. (bumble bee) pollination on safflower seed quality. Experiments with five treatments were prepared, four of which consisted of cages with either honey bees, bumble bees, or honey bees and bumble bees together in them, or without any insects, plus one open-pollinated plot treatment. To determine seed quality in the different treatments, the total seed yield, 1000 grain weight of seeds, number of seeds per capitulum, total oil content, fatty acid composition, and total oil yield in each treatment was determined. Total seed and oil yield was increased with bee pollination, whereas no significant difference was found in the total oil content and 1000 grain weight of seeds among treatments. Significant differences were observed among treatments in their seeds’ fatty acid compositions, specifically in their content of oleic acid, linoleic acid, and linolenic acid. As a result, it was found that pollination by bees can positively affect the seed characteristics of safflower, while also increasing the total seed yield. We thus recommend using commercial bees in the cultivation of safflower.
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Vera, C. L., R. K. Downey, S. M. Woods, J. P. Raney, D. I. McGregor, R. H. Elliott e E. N. Johnson. "Yield and quality of canola seed as affected by stage of maturity at swathing". Canadian Journal of Plant Science 87, n. 1 (1 gennaio 2007): 13–26. http://dx.doi.org/10.4141/p05-077.
Abstract (sommario):
Swathing is an important canola (Brassica napus L.) harvest operation in western Canada. The determination of the optimum timing for this operation is worth considering, as premature swathing may lead to reduced seed yield and quality. Seed yield and quality of three canola cultivars (44A89, AC Excel and Ebony), as affected by two seeding dates and several harvest times (six or eight swathing times and one direct combined treatment) was investigated on a Black Chernozem silty loam soil at Melfort, Saskatchewan, Canada, during 1998, 2000 and 2001. Seed yield, weight, protein content (oil-free meal basis) and oil content generally increased with seed development and swathing time. Early seeding was more conducive to achieving higher seed yield, especially in good growing conditions, and resulted in heavier mature seeds with higher oil content. Seed oil composition also changed during seed development. The proportion of oleic (C18:1) and linolenic (C18:3) acids increased, while that of myristic (C14:0), palmitic (C16:0), palmitoleic (C16:1), stearic (C18:0), linoleic (C18:2) and ara chidic (C20:0) acids decreased. The levels of the long chain fatty acids eicosenoic (C20:1) and erucic (C22:1) acids were unaffected. However, the overall amount of fatty acids synthesized (mg 100 seeds-1) increased as seeds matured. Swathing was advantageous over direct combining in preventing weather-induced shattering. Key words: Brassica napus, canola, fatty acid, oil, protein, seed development, seed quality, shattering, direct combining, swathing
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Hasan, M., M. Robbani, R. Parvin, MNH Mehedi e I. Hossain. "Effect of NPK on growth, yield and seed quality of hybrid Chilli". International Journal of Agricultural Research, Innovation and Technology 9, n. 1 (1 settembre 2019): 35–41. http://dx.doi.org/10.3329/ijarit.v9i1.42947.
Abstract (sommario):
An experiment was carried out at Germplasm Centre and Plant Biotechnology Lab, Department of Horticulture, PSTU to evaluate the growth, seed yield and quality of hybrid F1 chilli (cv. Sonic) crossing male line (LTSL-004-M) and female line (LTSL-004-F) along the viability of productive seeds influenced by NPK fertilizers during the period from November 2015 to October 2016. Ten different treatments of NPK fertilizers were used. Result showed that all the characteristics except primary branches and1000 seed weight were influenced significantly due to the application of NPK fertilizers. The tallest plant (69.88 cm), more leaves plant–1 (2491.33), highest number of secondary branches plant-1, tertiary branches plant-1 (5.00 and 88.00, respectively), number of flowers and hybrid fruits plant–1 (1533.00 and 12.33, respectively) and weight of seeds (4.03 g plant–1) along with required more time (54.67 days) for flowering were obtained from the application of 145 kg N ha–1, 175 kg P ha–1 and 96 kg K ha–1 (T4) which produced the highest final seed yield of chilli (4.03 kg ha–1). Application of T5 and T9 showed the highest number of primary branches (2.33). In seed viability characteristics T9 treated seeds showed the highest germination (100, 97.33 and 94.97%) at 1st, (1 MAH - Month After Harvest), 2nd (2 MAH) and 3rd (4 MAH) observations, respectively. The T3 treated seeds performed well in respect of Seed Vigour Index (SVI) at 1st and 2nd observations (8.00 and 7.48, respectively) but T9 treated seeds showed the highest SVI (6.32) at 3rd observation. Above indicating all characteristics were lowest under only recommended doses of NPK T1 as control treatment except days to first flowering. The observations suggested that production of hybrid chilli seeds could be enhanced by applying T4. While seeds of chilli treated by T9 in field level showed long time viable. Application of 145 kg N ha–1, 175 kg P ha–1 and 96 kg K ha–1 may be suggested for seed production of chilli and 110 kg N ha–1, + 175 kg P ha–1 + 115 kg K ha–1 for keeping the long time seed viability.
Int. J. Agril. Res. Innov. & Tech. 9 (1): 35-41, June, 2019
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TeKrony, Dennis M., e Dennis B. Egli. "DOES SEED VIGOR INFLUENCE CROP YIELD?" HortScience 26, n. 6 (giugno 1991): 797A—797. http://dx.doi.org/10.21273/hortsci.26.6.797a.
Abstract (sommario):
Both seed viability and vigor directly affect the performance of seeds planted to regenerate the crop. Although seed quality can influence many aspects of performance (e.g., total emergence, rate of emergence), this presentation will primarily examine the relationship of seed vigor to one aspect of performance - crop yield. Reductions in yield can be indirectly related to low seed vigor if the low vigor seed results in plant populations that are below a critical level. Thus, we investigated the direct effects of seed vigor on yield in the absence of population differences for annual crops that are harvested at three stages; during vegetative growth, early reproductive growth or at full reproductive maturity. Seed vigor affects vegetative growth and is frequently related to yield in crops that are harvested during vegetative growth or during early reproductive growth. However, there is usually no relationship between vigor and yield in crops harvested at full reproductive maturity because seed yields at full reproductive maturity are usually not closely associated with vegetative growth. The use of high vigor planting seed can be justified for all crops; however, to insure adequate plant populations over the wide range of field conditions which occur during emergence.
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Rahman, MB, MM Hossain, MM Haque, NA Ivy e S. Ahmad. "Seed production potentiality in yield and quality of eggplant (Solanum melongena L.) Grown under summer and winter seasons". Bangladesh Journal of Agricultural Research 42, n. 3 (9 novembre 2017): 437–46. http://dx.doi.org/10.3329/bjar.v42i3.34502.
Abstract (sommario):
Two separate field experiments were conducted at the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during April to October 2012 (summer season) and October 2012 to March 2013 (winter season) to evaluate and compare the seasonal effect on fruit set, seed yield and seed quality of eggplant. Six eggplant varieties (BARI Begun-1, BARI Begun-5, BARI Begun- 6, BARI Begun-8, BARI Begun-9 and Khotkhotia) were grown separately with proper isolation in both the seasons. Significant variation in fruit set per plant, seed yield per fruit and seed quality of eggplant were observed due to execution of growing seasons. The highest seed yield per fruit was obtained from BARI Begun-6 in both the seasons. Number of fruits per plant, seeds per fruit and 1000-seed weight showed the highest in winter season (October to March) as a result the highest seed yield was obtained from the same season. Winter season also showed the best seed quality attributes like germination (%), co-efficient of germination and vigour index irrespective of variety used. Based on seed yield and seed quality, winter season (October to March) found to be more favourable for quality seed production of eggplant in Bangladesh condition.Bangladesh J. Agril. Res. 42(3): 437-446, September 2017
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Souza, Josiany Thamara Alves, Cândido Alves da Costa, Delacyr da Silva Brandão Junior, João Batista de Campos Menezes, Warley Marcos Nascimento e Wesley José Cardoso. "Yield and quality of seeds of lettuce genotypes produced under organic management". Journal of Seed Science 41, n. 3 (luglio 2019): 352–58. http://dx.doi.org/10.1590/2317-1545v41n3220435.
Abstract (sommario):
Abstract: is one of the main vegetable species used in organic production. However, studies and research in the organic area are scarce. This study aimed to evaluate the yield and quality of seeds of lettuce genotypes produced in two consecutive years under an organic management system. Two plantations were installed under open field conditions corresponding to autumn/winter in 2016 and 2017. Ten lettuce genotypes were evaluated in four replications using a biofertilizer made from swine manure in the management and manual harvesting of seeds. Evaluations consisted of seed yield (in kg.ha−1), physical test (1000-seed weight), and germination and vigor test (first germination count, germination rate index, and seedling dry matter). The genotype Cubana and two Grand Rapids had higher yields under the tested conditions. Higher seed weights were recorded in 2017. Both genotypes Grand Rapids reached the minimum germination standard established for commercialization (80%). Vanda and AC 5058 showed a better performance for germination rate index and first germination count, while Cinderela had a better seedling dry matter. These varieties were promising for organic cultivation.