Literatura académica sobre el tema "Kohlrabi"
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Artículos de revistas sobre el tema "Kohlrabi"
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Sathasivam, Ramaraj, Min Cheol Kim, Hyeon Ji Yeo, Bao Van Nguyen, Soo In Sohn, Sang Un Park y Joonyup Kim. "Accumulation of Phenolic Compounds and Glucosinolates in Sprouts of Pale Green and Purple Kohlrabi (Brassica oleracea var. gongylodes) under Light and Dark Conditions". Agronomy 11, n.º 10 (27 de septiembre de 2021): 1939. http://dx.doi.org/10.3390/agronomy11101939.
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Kohlrabi is considered an important dietary vegetable worldwide. In this study, we investigated the growth and accumulation of phenolic compounds (PCs) and glucosinolates in sprouts of pale green and purple kohlrabi (Brassica oleracea var. gongylodes) in response to light and dark conditions. Pale green kohlrabi presented high fresh weight and root length irrespective of light treatment, whereas under dark conditions, it presented higher fresh weight and shoot length than purple kohlrabi. In contrast, the root length of both kohlrabies increased markedly under light conditions compared to that under dark conditions. Thirteen PCs and eight glucosinolates were detected and quantified in 10-day-old pale green and purple kohlrabies. In both kohlrabies, the individual and total phenolic levels were much higher under the light treatment than under the dark treatment. Under light and dark conditions, the total phenolic content was 6362.13 and 5475.04 µg/g dry weight in the pale green kohlrabi, respectively, whereas in the purple kohlrabi, it was 10,115.76 and 9361.74 µg/g dry weight, respectively. Dark conditions favored higher accumulation of glucosinolates than light conditions. Progoitrin, neoglucobrassicin, glucoerucin, and 4-methoxyglucobrassicin were the predominant glucosinolates in both kohlrabies and were present in much higher amounts in the pale green kohlrabi. In pale green kohlrabi under dark conditions, the total glucosinolates content was 4.75 and 2.62 times higher than that of the purple kohlrabi under light and dark conditions, respectively. Among individual glucosinolates, in the pale green kohlrabi under the dark condition, progoitrin was found to have the highest content, which was 90.28 and 54.51 times higher than that in the purple kohlrabi under light and dark conditions, respectively. These results show that the phenolic and glucosinolates levels varied widely, and these variations between the two types of kohlrabi under both light and dark conditions were significant. Our findings suggest that light and dark conditions enhance the accumulation of PCs and glucosinolates, respectively, during the development of kohlrabi seedlings.
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Gawęda, Maria y Zofia Nizioł-Łukaszewska. "Quality of kohlrabi stems (Brassica oleracea var. gongylodes L.) kept in cold storage". Folia Horticulturae 23, n.º 2 (1 de enero de 2011): 107–10. http://dx.doi.org/10.2478/v10245-011-0016-3.
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Quality of kohlrabi stems (Brassica oleracea var. gongylodes L.) kept in cold storage Two green kohlrabi cultivars, ‘White Delikates’ and ‘Korist’ F1, were kept in cold storage at a temperature of 2°C and a relative humidity of 95%. Natural mass losses were measured at monthly intervals and dry matter content, soluble sugars, L-ascorbic acid and isothiocyanates were analysed. During five months of storage, very low losses of kohlrabi mass were detected. The decrease in dry matter during that time was between 15 and 18%. After a brief increase, soluble sugar content decreased during storage, and in March, 50% of the initial sugar content was calculated for ‘Delikates’ kohlrabi flesh and 65% for ‘Korist’. L-ascorbic acid was well preserved in the kohlrabi, since 90% remained after storage was completed. The isothiocyanate content changed little and the vegetable remained a good source of these compounds throughout the storage period.
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Lošák, Tomáš, Tomáš Válka, Jakub Elbl, Antonín Kintl, Anna Keutgen, Norbert Keutgen, Lenka Demková et al. "Fertilization with Magnesium- and Sulfur-Supplemented Digestate Increases the Yield and Quality of Kohlrabi". Sustainability 12, n.º 14 (16 de julio de 2020): 5733. http://dx.doi.org/10.3390/su12145733.
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The vegetation pot experiment with kohlrabi (Moravia variety) was established in 2014 and 2015. The experiment included four treatments of fertilization: (1) untreated control, (2) digestate, (3) digestate + Mg + S, and (4) digestate + S. Treatments 2–4 were fertilized with the same N dose. Differences between the years were recorded in all parameters. Compared with the variant with digestate (100%), the kohlrabi yield of the unfertilized variant was demonstrably lower in both years (33.1% and 46.9%). Digestate enriched with the fertilizer containing Mg + S (treatment 3) demonstrably increased the yield of kohlrabi by 10.2% and 15.7% compared with pure digestate (treatment 2). Digestate enriched with the fertilizer containing elementary S (treatment 4) demonstrably increased the yield of kohlrabi (by 7.4%) only in 2015 compared with pure digestate (treatment 2). Except for the year 2015, there were no yield differences between variants 3 and 4. In both years, the lowest content of nitrates in kohlrabi was observed in the unfertilized control (135 and 163 mg NO3−/kgFM, respectively). Following the application of digestate (treatment 2), the content of nitrates (mg NO3−/kgFM) increased to 327 in 2014 and to 509 in 2015. The addition of fertilizers with Mg + S as well as fertilizer with elementary S to the digestate (treatment 3 and 4) significantly reduced the content of nitrates to 295–301 mg NO3−/kgFM (2014) and to 449–468 mg NO3−/kgFM (2015). The content of ascorbic acid did not statistically differ among the four treatments in the two years (268–281 and 311–329 mg/kgFM in 2014 and 2015, respectively). Digestate supplemented with Mg + S (magnesium sulfate) or only with elementary S can be recommended for kohlrabi fertilization prior to the planting in order to reduce dangerous accumulations of nitrates in kohlrabi.
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Cosic, Tatjana, Jelena Savic, Martin Raspor, Aleksandar Cingel, Nabil Ghalawnji, Branka Vinterhalter y Slavica Ninkovic. "Effects of different types of sugars and plant growth regulators on kohlrabi seedling growth and development in vitro". Archives of Biological Sciences 72, n.º 3 (2020): 349–57. http://dx.doi.org/10.2298/abs200622029c.
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Kohlrabi (Brassica oleracea var. gongylodes), with its edible stem tuber formed at the base of the plant stem, presents a valuable source of nutrients. The potential effects of plant growth regulators (PGRs), as well as various concentrations of different sugars on the in vitro development of kohlrabi were studied. Ten-day-old kohlrabi seedlings were cultivated in vitro for 5 weeks at 18?2?C on half-strength MS media containing different concentrations of carbon source such as sucrose, fructose, glucose, xylose and mannitol, combined with or without specific plant growth regulators (N6-benzyladenine (BA), gibberellic acid (GA3), 2,3,5-triiodobenzoic acid (TIBA)). Results showed no tuber formation in all treatments, but growth and development of treated kohlrabi seedlings was significantly affected in a distinctive manner, with a variety of morphological traits being altered in comparison to matching controls.
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Knoche, Moritz y Martin J. Bukovac. "Interaction of Surfactant and Leaf Surface in Glyphosate Absorption". Weed Science 41, n.º 1 (marzo de 1993): 87–93. http://dx.doi.org/10.1017/s0043174500057635.
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The effect of oxyethylene (OE) chain length of three homologous series of nonionic surfactants (allinol, nonoxynol, octoxynol) on glyphosate uptake was markedly affected by the leaf surface fine-structure of sugarbeet and kohlrabi. Adaxial leaf surfaces of sugarbeet were covered with a layer of amorphous wax, whereas the adaxial surface of kohlrabi leaves was covered with fine crystalline wax. Foliar uptake of glyphosate (1 mM glyphosate, 20 mM glycine, pH 3.2) averaged 4% for sugarbeet without surfactant, but droplets were not retained by kohlrabi leaves in the absence of a surfactant. Glyphosate absorption with octoxynol (9 to 10 OE units, 0.5 g L−1) was rapid initially (0 to 2 h) and leveled off about 2 h after application in both species. Absorption by sugarbeet decreased from 12 to 3% as OE content of octoxynol was increased from 5 to 30 OE units. In contrast, surfactants of intermediate OE content (octoxynol, 16 OE units) induced the greatest uptake (17%) on kohlrabi. Leaf wetting was markedly affected by surfactant and leaf surface. As OE content of octoxynol increased from 5 to 30 OE units, droplet/leaf interface areas of 1-μl droplets decreased from 4 to 3 mm2 on the adaxial leaf surface of sugarbeet and from 61 to 2 mm2 on kohlrabi. Concurrently, the rate of droplet evaporation (1 μl) decreased from 1.0 to 0.7 nl s−1 on sugarbeet and 4.2 to 0.5 nl s−1 on kohlrabi leaves. The effect of OE content on enhancement of glyphosate uptake and wetting characteristics of spray solutions was similar within species for different hydrophobic moieties but differed markedly between species.
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Kalhor Qom, Naser, Mohsen Sheykhhasan y Ali Kowsari. "Evaluation of Kohlrabi (Brassica oleracea Var. Gongylodes) Extract Effect on Mesenchymal Stem Cells Viability and Apoptosis". Research in Molecular Medicine 8, n.º 2 (11 de abril de 2020): 93–102. http://dx.doi.org/10.32598/rmm.8.2.1.
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Background: Cell viability and apoptosis are two crucial factors that may determine cell fate. There are several factors, such as hypoxia, which may be effective in cell processes. Because of its unique features, such as its antioxidant, anti-inflammatory, and anti-apoptosis mechanisms, kohlrabi (Brassica oleracea var. gongylodes) extract may be used in the amelioration of cell viability and a decrease in cell apoptosis. In this study, we evaluate the effect of kohlrabi extract on the viability and apoptosis of adipose-derived mesenchymal stem cells (AD-MSCs). Materials and Methods: In this study, extract from kohlrabi and mesenchymal stem cells from adipose tissue were isolated in a laboratory under sterile conditions. Expression of mesenchymal stem cell (MSC) surface markers, including CD44, CD90, and CD105 was evaluated by flow cytometry method. Besides, CD34 was used as a negative marker. MTT assay was carried out to determine the cell viability. Evaluation of BCL2 and BAX expression levels was performed by real-time PCR. Results: MSC surface markers were verified by flow cytometry. The obtained results demonstrated a significant difference between the cell viability of the kohlrabi-extract treated and control group over time (P=0.03). In addition, the real-time PCR analysis showed that expression levels of BCL2 significantly increased in hypoxic condition after treatment with leaf extract (P=0.019). However, there was no significant expression change in the BAX gene. Conclusion: Our study illustrates that kohlrabi extract may have positive effects on cell survival while having inhibitory effects on apoptosis.
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Liebig, H. P. "TEMPERATURE INTEGRATION BY KOHLRABI GROWTH". Acta Horticulturae, n.º 230 (septiembre de 1988): 371–80. http://dx.doi.org/10.17660/actahortic.1988.230.49.
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Liebig, H. P. "TEMPERATURE INTEGRATION BY KOHLRABI GROWTH". Acta Horticulturae, n.º 248 (septiembre de 1989): 277–84. http://dx.doi.org/10.17660/actahortic.1989.248.33.
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Legocka, J., A. Woźny y A. Szweykowska. "Ultrastructural study of chloroplasts isolated by various fractionation methods". Acta Societatis Botanicorum Poloniae 44, n.º 3 (2015): 443–48. http://dx.doi.org/10.5586/asbp.1975.040.
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The chloroplasts of kohlrabi and barley leaves isolated in conventional media and examined in electron microscope showed considerable impairements of their structure. The damages were not eliminated if the centrifugation number was limited and the tonicity of the medium was reduced gradually throughout the fixation and dehydration procedure. A good yield (about 90%) of structurally intact kohlrabi chloroplasts was obtained when they were isolated from leaves pre-fixed and homogenized in medium containing glutaraldehyde.
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Craver, Joshua K., Joshua R. Gerovac, Roberto G. Lopez y Dean A. Kopsell. "Light Intensity and Light Quality from Sole-source Light-emitting Diodes Impact Phytochemical Concentrations within Brassica Microgreens". Journal of the American Society for Horticultural Science 142, n.º 1 (enero de 2017): 3–12. http://dx.doi.org/10.21273/jashs03830-16.
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Multilayer vertical production systems using sole-source (SS) light-emitting diodes (LEDs) can be an alternative to more traditional methods of microgreens production. One significant benefit of using LEDs is the ability to select light qualities that have beneficial impacts on plant morphology and the synthesis of health-promoting phytochemicals. Therefore, the objective of this study was to quantify the impacts of SS LEDs of different light qualities and intensities on the phytochemical content of brassica (Brassica sp.) microgreens. Specifically, phytochemical measurements included 1) total anthocyanins, 2) total and individual carotenoids, 3) total and individual chlorophylls, and 4) total phenolics. Kohlrabi (Brassica oleracea var. gongylodes), mustard (Brassica juncea ‘Garnet Giant’), and mizuna (Brassica rapa var. japonica) were grown in hydroponic tray systems placed on multilayer shelves in a walk-in growth chamber. A daily light integral (DLI) of 6, 12, or 18 mol·m−2·d−1 was achieved from SS LED arrays with light ratios (percent) of red:blue 87:13 (R87:B13), red:far-red:blue 84:7:9 (R84:FR7:B9), or red:green:blue 74:18:8 (R74:G18:B8) with a total photon flux from 400 to 800 nm of 105, 210, or 315 µmol·m−2·s–1 for 16 hours, respectively. Phytochemical measurements were collected using spectrophotometry and high-performance liquid chromatography (HPLC). Regardless of light quality, total carotenoids were significantly lower under increasing light intensities for mizuna and mustard microgreens. In addition, light quality affected total integrated chlorophyll with higher values observed under the light ratio of R87:B13 compared with R84:FR7:B9 and R74:G18:B8 for kohlrabi and mustard microgreens, respectively. For kohlrabi, with increasing light intensities, the total concentration of anthocyanins was greater compared with those grown under lower light intensities. In addition, for kohlrabi, the light ratios of R87:B13 or R84:FR7:B9 produced significantly higher anthocyanin concentrations compared with the light ratio of R74:G18:B8 under a light intensity of 315 µmol·m−2·s−1. Light quality also influenced the total phenolic concentration of kohlrabi microgreens, with significantly greater levels for the light ratio of R84:FR7:B9 compared with R74:G18:B8 under a light intensity of 105 µmol·m−2·s−1. However, the impact of light intensity on total phenolic concentration of kohlrabi was not significant. The results from this study provide further insight into the selection of light qualities and intensities using SS LEDs to achieve preferred phytochemical content of brassica microgreens.
Tesis sobre el tema "Kohlrabi"
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Lippert, Felix. "Die Rissbildung vegetativer Ertragsorgane dargestellt am Beispiel von Kohlrabi (Brassica oleracea var. gongylodes)". Remagen Kessel, 2000. http://deposit.ddb.de/cgi-bin/dokserv?id=2643879&prov=M&dok_var=1&dok_ext=htm.
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Sandmann, Martin. "Fundamentals for modeling of micro climate, plant growth and plant quality development in field vegetable production below plastic covers". Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17200.
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Folienmanagement ist von wirtschaftlicher Bedeutung im Freiland-Gemüsebau im Frühjahr. Aber die Prognose des optimalen Zeitpunktes der Abnahme von Plastik-Abdeckungen vom Bestand ist mit den bereits verfügbaren Mitteln zu ungenau, um die heutigen Anforderungen an die Produktionssicherheit zu erfüllen. Der bislang verwendete empirische Ansatz benötigt aktuelle Referenzmessungen unter den Abdeckungen, welche kostspielig sind. Das Ziel dieser Arbeit war es, die Grundlagen eines mechanistischeren Modellansatzes zu entwickeln, welcher auf dem physikalischen und biologischen Verständnis von Energiehaushalt, Pflanzenwachstum und den Prozessen der Qualitätsentwicklung unter den Abdeckungen beruht, um die zukünftige Produktionssicherheit zu verbessern. Entsprechende Feldversuche wurden durchgeführt, um Daten zum Pflanzenwachstum und Mikroklima unter und über der Abdeckung zu erhalten und neue sowie etablierte Untermodelle zu parametrisieren. Weiterhin wurden Laborversuche zum Verständnis z.B. der optischen Eigenschaften der Abdeckungen, Blätter und des Bodens ausgeführt. Außerdem wurde eine neue Methode zur Bestimmung des Blattflächenindex bei Kopfsalat und Kohlrabi geprüft und für die effiziente Erhebung der Pflanzendaten etabliert (Sandmann et al. 2013). Im Ergebnis können nun verschiedene Prozesse der Gemüseproduktion unter Abdeckungen besser verstanden und mit hinreichender Genauigkeit mathematisch beschrieben werden, z.B. Strahlungshaushalt (Graefe & Sandmann 2014) und Blattflächenwachstum. Die meisten Ziele der Arbeit wurden erreicht. Weitere Arbeit ist vor allem notwendig für die Modellierung der Lufttemperatur unter der Abdeckung und die Entwicklung eines mechanistischen Ansatzes zur Beschreibung der Pflanzenqualität. Hier konnte die Pflanzenqualität wegen der subjektiv beeinflussten Daten nur über einen empirischen Ansatz modelliert werden. Die übliche Erfassung der Pflanzenqualität sollte überdacht werden, um zukünftig möglichst objektive Werte zu erhalten.Plastic film management is economically of importance for vegetable growing in the field in early spring, but the prediction of the best moment of removal of plastics from the crops is currently too imprecise to fulfill contemporary requirements in production safety. The broadly used approach for prediction is of empirical nature and is depending on current reference data from below covers, which are expensive to gather. The aim of this thesis was to develop the scientific foundations for a more mechanistic model approach, based on the physical and biological understanding of the energy balance, plant growth and plant quality formation process below plastic covers in order to increase future production safety. Field trials at three sites, with two species and several cover materials and removal strategies were carried out to gain data from plants and microclimate beneath and above covers for parameterization of new and established submodels. Additionally, laboratory experiments were performed to understand e.g. the optical properties of plastics, leaves and soil. Furthermore, a new method for determining leaf area index in lettuce and kohlrabi was adopted and established for a more efficient plant data collection (Sandmann et al. 2013). As a result, several processes of vegetable production using plastic covers are now better understood and can be described mathematically and sufficiently precise, e.g. the short wave radiation budget (Graefe & Sandmann 2014) and leaf area growth. Most, but not all aims of the thesis could be achieved. Further work will be necessary according to modeling of air temperature below the covers, leaf gas exchange and the development of a mechanistic approach for plant quality formation. Here, plant quality could only be modelled via an empirical approach, due to subjectively influenced data. Common plant quality data acquisition should be reconsidered to yield as much as possible objective values in the future.
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Svetlana, Bošković. "Fitohemijski sastav, lekoviti potencijal i senzorne karakteristike sorti vrsta Brassica oleracea L. i Brassica rapa L. (Brassicaceae) iz organskog i konvencionalnog sistema proizvodnje". Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2016. https://www.cris.uns.ac.rs/record.jsf?recordId=101645&source=NDLTD&language=en.
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U ovom radu su ispitani hemijski sastav i biološka aktivnost vrsta Brassica oleracea i Brassica rapa poreklom iz organskog i konvencionalnog sistema proizvodnje. Ispitivanja hemijskog sastava su obuhvatila određivanje volatilnih komponenata primenom headspace GC-MS tehnike, kvalitativnu analizu sokova ispitivanih vrsta pomoću LC-DAD-MS/MS tehnike, kvantifikaciju odabranih fenolnih jedinjenja pomoću LC-MS/MS tehnike i spektrofotometrijsko određivanje sadržaja ukupnih glukozinolata, fenola i flavonoida i sadržaja ukupnih monomernih antocijana. Biološka aktivnost povrća je ispitana određivanjem antioksidantnog potencijal, antimikrobne i antitumorske aktivnosti sokova. Dobijeni rezultati pokazuju da su glavne volatilne komponente ispitivanih vrsta degradacioni proizvodi masnih kiselina i organosumpornih jedinjenja od kojih neke od identifikovanih komponenata predstavljaju ključne mirisne komponente. Na osnovu njihove distribucije nije bilo moguće utvrditi uticaj sistema proizvodnje na miris i ukus ispitivanih vrsta. Pomoću LC-DAD-MS/MS i LC-MS/MS tehnike je utvrđeno prisustvo primarnih metabolita, slobodnih hidroksibenzoevih i hidroksicimetnih kiselina, derivate hinske kiseline sa hidroksicimetnim kiselinama, glikozida flavonola, biflavonoida, i kumarina u sokovima spitivanih vrsta. Pored toga u svim sokovima subili prisutni kondenzacioni proizvodi degradacionih proizvoda indolnih glukozinolata sa askorbinskom kiselinom- askorbigen i metoksiaskorbigen. U sokovima crvenog kupusa su bili prisutni antocijani. Najveći sadržaj ukupnih glukozinolata je određen u brokoliju, dok je crveni kupus sadržao najveći sadržaj ukupnih fenola ukupnih flavonoida kao i hinske kiseline. Crveni kupus je bio varijetet koji je ispoljio najviši antioksidantni kapacitet u svim primenjenim testovima, brokoli i karfiol su ispoljili najjaču antimikrobnu aktivnost, dok je kelj bio varijetet sa najjačim antitumorskim delovanjem. Na osnovu analize hemijskog sastava i biološke aktivnosti vrsta B. oleracea i B. rapa može se zaključiti da u zavisnosti od primenjenog tipa proizvodnje mogu biti poboljšane neke od karakteristika ispitivanih vrsta i da je uticaj sistema proizvodnje značajan za pojedine varijetete, a nikako za celu vrstu. U konačnom obliku može se zaključiti da bi potencijalna kombinacija sokova crvenog kupusa, brokolija, karfiola i kelja mogla ostvariti značajno hemopreventivno i hemoterapeutsko delovanje, ispoljavajući istovremeno antioksidantnu, antimikrobnu i antitumorsku aktivnost.Chemical composition and biological activity of Brassica oleracea and B. rapa species were investigated in the present work. Investigation of chemical composition encompassed determination of volatile compounds by headspace GC-MS technique, qualitative analysis of juices of investigated vegetables by LC-DAD-MS/MS technique, quantification of selected phenolic compounds by LC-MS/MS technique and spectrophotometric determination of total content of glucosinolates, phenolic compounds and flavonoids and total content of monomeric anthocyanes. Biological activity of vegetables was investigated by determination of antioxidant capacity, antimicrobial and antitumorigenic effect of juices. Obtained results showed that main volatile compounds were degradation products of fatty acids and organo-sulphur compounds among which some of the identified components were the key aroma compounds. Based on their distribution it was not possible to evaluate influence of cropping system on aroma and taste of investigated species. By LC-DAD-MS/MS and LC-MS/MS techniques, it was determined the presence of primary metabolites, freehydroxybenzoic and hydroxycinnamic acids, derivatives of quinic acid and hidroxicinnamic acids, flavonol glucosides, biflavnoids and a cumarin in juices of the investigated species. Furthermore, condensation products of degradation products of indole glucosinolates with ascorbic acid- ascorbigen and metoxiascorbigen were present in all juices. Anthocyanes were present in juices of red cabbage. The highest total content of glucosinolates was determined in broccoli, while red cabbage had the highest total phenolic content, total flavonoid content, as well as content of qunic acid. Red cabbage was a variety that showed the highest antioxidant capacity measured by different assays. Broccoli and cauliflower expressed the highest antimicrobial potential, while Savoy cabbage was a variety with the highest antitumor effect. Investigation of chemical composition and biological activity showed that applied cropping conditions may be useful for improving some of the characteristics of investigated species and significance of cropping system only for particular varieties, but not for the whole species in general. As the conclusion, potential combination of juices of red cabbage, broccoli, cauliflower and Savoy cabbage could be potent chemopreventive and chemotherapeutic agent, expressing simultaneously antioxidant, antimicrobial and antitumor activity.
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HOU, HUI-XHEN y 侯惠珍. "Effect of mulching and irrigation on growth of sweet pepper, cauliflower and kohlrabi". Thesis, 1988. http://ndltd.ncl.edu.tw/handle/68927662407728438851.
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Hou, Hui-Zhen y 侯惠珍. "Effect of mulching and irrigation on growth of sweet pepper, cauliflower and kohlrabi". Thesis, 1988. http://ndltd.ncl.edu.tw/handle/82926288321325161899.
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Hsueh, Cheng-Yi y 薛正一. "Nutritional-physiological Responses of Cabbage, Kohlrabi and Rice plants to Different Organic Fertilizers". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/84448663531723276754.
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碩士國立臺灣大學
農業化學研究所
91
Abstract Crops responses differently to various organic fertilizers due to different properties. The purpose of this study was to investigate the nutritional-physiological responses of cabbage, kohlrabi, and rice plants to different rates and different kinds of organic fertilizers. The study was conducted in Chishan Banch Station, Kaohsiung District Agriculture Improvement Station, Kaohsiung. There were two studies, one investigated the nutritional-physiological responses of cabbage and rice plants to four different kinds of organic fertilizers which were farm-yard manure, hog dung manure, cattle dung manure, and seed residue compost, the other investigated the effects of different rates of hog dung manure on kohlrabi growth and cattle dung manure on rice plant growth. In the later, the four rates of organic fertilizers were based on the amount of nitrogen fertilizer applied in the chemical fertilizer treated plot. A chemical fertilizer treated plot and a no fertilizer treated plot were also conducted in the two studies. The result showed that the dry weight and uptake of nitrogen, phosphorus, potassium, and magnesium of cabbage of cattle manure treated plot were higher than those of other treatments 26 days after transplanting. However, uptake of calcium, iron, manganese, and zinc were high in chemical fertilizer treatment. The dry weight and uptake of nitrogen, iron, manganese, and zinc of cabbage were higher in chemical fertilizer treatment 56 days after transplanting. However, the uptake of potassium and calcium were higher in farm yard manure treated plot and the uptake of phosphorus and magnesium were higher in cattle manure treatment. The dry weight and the uptake of nutrients other than manganese of rice plants were higher in hog dung manure treated plot than those of the other treatments at active tillering stage. However, the dry weight and nutrient uptake of rice plants were higher in hog dung manure treated plot at maturity stage. The dry weight and uptake of nutrients of kohlrabi of chemical fertilizer treated plot were higher than those of other treatments 20 days after transplanting. However, the dry weight and nutrient uptake other than magnesium of kohlrabi were higher in triple hog dung manure treatment. The dry weight and nutrient uptake other than manganese and zinc of rice plants were higher in triple cattle dung manure treatment at active tillering stage. However, the dry weight and nutrient uptake other than manganese were higher in quartic cattle dung manure treatment at maturity stage. Key words: cabbage, kohlrabi, rice plants, organic fertilizer.
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Chen, Yi-Chun y 陳怡君. "The Effects of Copper and Zinc Concentration in Manure Composts on the Kohlrabi Growth and the Copper and Zinc Uptake". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/70729837561737240989.
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碩士國立臺灣大學
農業化學研究所
98
The climate in Taiwan is characterized by high temperature and humidity, therefore, the soil organic matter is easily and rapidly decomposed. Using the manure compost to increase soil organic matter is one of the best ways to recycle the agricultural waste materials. However, the high concentration of heavy metals in the compost may produce some risk on the soil quality. The objective of this study is to investigate the effects of three commercial manure composts (A, B and C) with different levels of copper (Cu) and zinc (Zn) concentration (Cu 0~200 mg kg-1, Zn 0~700 mg kg-1) and different application rates (0, 20 and 40 ton/ha/yr) on soil quality, kohlrabi growth, and the Cu and Zn concentration in the kohlrabi. The control and chemical fertilizer application were also included in the treatments. Four replicates were performed in every treatment. The kohlrabi (Brassica caulorapa Pasq.) was grown in this research. The results showed that compost application can enhance soil pH, electric conductivity (EC), soil organic carbon content, total N, available P, available K and available Ca. Therefore, most compost treatments had the higher yield, total N, P, K and Ca than that of the control. The soil total Cu and Zn concentration were dependent on the concentration Cu and Zn in the compost and the compost application rate. In all treatments, the soil total Cu and Zn concentration were still far lower the regulation of Cu and Zn in the soils in Taiwan. In this study, there are significant relationships between soil total Zn concentration and Zn concentration in the leaf of kohlrabi or Zn in the stem of kohlrabi (p<0.01). The 0.1 M HCl, 0.05 M EDTA, 0.005 M DTPA and 0.01 M CaCl2 extractable soil available Cu concentration can not be regarded as soil testing methods to estimate the Cu concentration of the kohlrabi (p>0.05). The 0.1 M HCl, 0.05 M EDTA and 0.005 M DTPA extractable soil available Zn concentration can be regarded as soil testing methods to estimate the Zn concentration of the kohlrabi (p<0.01). The Zn concentration in the stem and leaf of kohlrabi are significantly increased by the application rates of the composts but still within the regulation Zn in the food, which indicated that the compost applied in this research had no risks to food security. To sum up the results of this study, when the manure compost were applied to weak acid sandy loam soils (pH 5.9) at 40 ton/ha, EC lower than 15 dS/m and the Cu and Zn concentration lower than 200 mg/kg and 700 mg/kg, respectively, will have no negative effects on the soil quality, crop production and food security.
Libros sobre el tema "Kohlrabi"
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Bright, David E. Sally Woolie and the crunchy kohlrabi. New York (411 Fifth Ave., New York 10016): The Summer Camp, 1993.
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Jarmin, Marvin L. Cabbage, brussels sprouts, cauliflower & kohlrabi seed production in the Pacific Northwest. [Corvallis, Or.]: Washington State University Cooperative Extension, Or. State University Extension Service, University of Idaho Cooperative Extension Service, and U.S. Dept. of Agriculture, 1985.
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Hendrickson, Audra. Broccoli & company: Over 100 healthy recipes for broccoli, Brussels sprouts, cabbage, cauliflower, collards, kale, kohlrabi, mustard greens rutabaga, and turnip. Pownal, Vt: Storey Communications, 1989.
Buscar texto completoCapítulos de libros sobre el tema "Kohlrabi"
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Ruppel, Silke y Birgit Wernitz. "Quantifizierung und Monitoring von Pantoea agglomerans an Kohlrabi-Wurzeln und -Blättern mittels Real-time-PCR". En Wurzelinduzierte Bodenvorgänge, 56–61. Wiesbaden: Vieweg+Teubner Verlag, 2004. http://dx.doi.org/10.1007/978-3-322-80084-8_8.
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KALLOO, G. "Kohlrabi". En Genetic Improvement of Vegetable Crops, 191–94. Elsevier, 1993. http://dx.doi.org/10.1016/b978-0-08-040826-2.50016-3.
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Sorescu, Ana-Alexandra, Alexandrina Nuta y Rodica-Mariana Ion. "Pale-Green Kohlrabi, a Versatile Brassica Vegetable". En Brassica Germplasm - Characterization, Breeding and Utilization. InTech, 2018. http://dx.doi.org/10.5772/intechopen.76921.
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Benko, Božidar. "Improving greenhouse production of French bean, kohlrabi and kale by GAP implementation". En VII South-Eastern Europe Syposium on Vegetables & Potatoes. University of Maribor Press, 2017. http://dx.doi.org/10.18690/978-961-286-045-5.31.
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