Littérature scientifique sur le sujet « Breed paddy »

Rice is the most important crop for worldwide consumers. The water utilization of rice planting is more than 50% of agricultural water in China, and it is necessary to breed water-saving and drought-resistant rice. The rice variety Dianheyou 615 can be planted in the paddy and upland fields, which satisfies rice production farmers in mountainous regions of Yunnan. We aimed to explore the variations in Magnaporthe oryzae isolates collected from Dianheyou 615 planted in paddy or upland fields. Through pathogenicity tests, we found that most isolates had the highest pathogenicities, but there were no significant differences between the paddy and upland isolates. By a combination of monogenetic and elite rice lines, with a further resistance assessment, the monogenetic lines with Pi9, Diantun 506, and Lvhan 1 displayed better resistances. Moreover, we re-sequenced 15 isolates to explore their genetic variations. Our results showed that the source of the upland isolates may have been the offspring of the paddy isolates, but there were many genes with specifically found SNPs in two populations that would develop subdivisions after long-time planting. Overall, we compared the pathogenicities and genetic variations in blast isolates from the planting of Dianheyou 615 in paddy and upland fields, which provided references for the influence of the planting environment on population subdivisions.

The present study was undertaken to investigate and compare the socio-economic characteristics and relative profitability of local breed and cross breed dairy cow rearing farmers. The focus of the present study was to quantify the costs and returns and to explore the interrelationship of factors affecting yield, cost and net return for the local and cross breed cows and also compare these with each other. On an average, local and cross breed dairy cow owners possessed 4.93 and 4.76 animals per household respectively. Per day total costs of rearing per local and cross breed cow were Tk.32.85 and Tk.71.23 respectively. Feed cost constituted about 58 percent of total cost for local breed cows while it was 62 percent for cross breed cows. Paddy cost occupied the largest share out of total feed cost in local breed cows. The average milk yield per day per cow was 1.89 litres and 7.68 litres for local breed and cross breed dairy cows respectively while the total return per day per cow was estimated at Tk.58.27 and Tk.224.76 for the same and the net returns per day per cow were Tk.25.42 and Tk.153.53. The study revealed that green grass, concentrate feed, labour cost and capital cost have significantly positive impact on milk yield for cross breed cows but all the inputs other than labour cost and capital cost have positive impact on milk yield for local breed cows. It was further observed that the resources were not efficiently used by both local breed and cross breed farms. It may be concluded that both local and cross breed dairy cow owners had a scope to reallocate their resources. However, it was found from the study that profitability of cross breed cows was higher than that of the local breed cows. The study identified some major problems and constraints as reported by farmers which were: lack of grazing land, lack of veterinary care and services, high price and scarcity of feed and fodder, low price of milk, etc. Finally, policy implications of the study were suggested. DOI: http://dx.doi.org/10.3329/jsf.v8i1-2.14616 J. Sci. Foundation, 8(1&2): 23-29, June-December 2010

This research was carried out at the Experimental Farm of Sakha Agricultural Research Station, Sakha, Kafr El-Sheikh, Egypt, during the 2018–2020 rice-growing seasons to develop and evaluate four iso-cytoplasmic rice-restorer lines: NRL79, NRL80, NRL81, and NRL82, as well as Giza 178, with ten new hybrids in order to estimate genotypic coefficient, phenotypic coefficient, heritability in a broad sense, and advantage over Giza 178 as a check variety (control) of new restorer lines. This study also estimated combining ability, gene action, better-parent heterosis (BP), mid-parent heterosis (MP), and standard heterosis (SH) over Egyptian Hybrid 1 (IR69A × Giza 178) as a check hybrid (control) for grain yield, agronomic traits, and some grain-quality characters in restorer lines and hybrids. The percentage of advantage over commercial-variety Giza 178 (check) was significant, and highly significant among the newly developed restorer fertility lines for all the studied traits. This indicates that the selection is a highly effective factor in improving these traits. New restorer fertility lines showed highly significant positive values over commercial restorer for grain yield; the values ranged from 51% for NRL80 to 100.4% for NRL82, respectively. Meanwhile, in regard to the grain shape of paddy rice, three lines of the promising lines showed highly significant negative desirable values compared with Giza 178; the values ranged from −7.7% for the NRL80 to −15.2% for NRL79, respectively. Based on the superiority of the new lines, the new lines can be used as new restorer fertility lines to breed promising new hybrids and new inbred rice lines or varieties. From the results of the testcross experiment, the four promising lines were identified as effective restorer fertility lines for two cytoplasmic male sterile (CMS) lines. Moreover, the six rice hybrids showed values for SH heterosis of grain yield/plant of more than 15% over the check hybrid variety, with high values of 1000-grain weight and desirable grain shape; these hybrids were G46A × NRL81 (125.1%), G46A × NRL80 (66.9%), IR69A × NRL79 (47.2%), G46A × NRL79 (24.6%), IR69A × NRL81 (23.4%), and IR69A × NRL82 (16.2%).

Anopheles barbirostris and Anopheles subpictus are the primary vectors of malaria in East Nusa Tenggara. Anopheles mosquitoes generally breed at similar environment, including water streams, irrigation passages, water containers, paddy fields, impermanent ponds, water puddles, marsh, and brackish water. Modelling and spatial analysis play a role in identifying factors associated with potential breeding places for Anopheles mosquitoes, hence comprehension of breeding place characteristics and effective malaria control. The cross-sectional study used an observational-analytic approach. Study samples were identified larvae and breeding places of Anopheles spp. in Lifuleo village in West Kupang. We measured water salinity and pH, and we recorded coordinates of breeding places. Data analysis was performed by using Moran I index and spatial error model to identify factors associated with potential breeding places for Anopheles mosquitoes. Anopheles species found were An. barbirostris, An. subpictus, An. vagus, An. vagus var limosus, and An. indefinitus. All identified Anopheles larvae were found in brackish water, and in breeding places with high water salinity, with An. subpictus being able to survive the highest salinity (48‰). Univariate analysis demonstrated Io value of 0.00926, coefficient constant of 0.693868, and probability of 0.02252. The presence of Anopheles spp. was associated with breeding place habitat, daytime feeding, and presence of vegetations surrounding breeding places. Keywords: Anopheles spp, Lifuleo village, habitat characteristics, spatial. Abstrak Anopheles barbirostris dan Anopheles subpictus merupakan vektor primer malaria di Provinsi Nusa Tenggara Timur. Spesies Anopheles mempunyai habitat perkembangbiakan yang tidak sama yaitu aliran air, batas tangki, saluran irigiasi, sawah, kolam sementara, genangan air dekat pantai, genangan air di sungai, mata air, kolam ikan terlantar, rawa dan genangan air payau. Pemodelan dan analisis spasial dapat menjelaskan faktor-faktor yang memengaruhi habitat perkembangbiakan potensial bagi jentik Anopheles spp. Pengendalian malaria akan efektif apabila pengetahuan tentang karakteristik habitat perkembangbiakan dipelajari secara komprehensif. Metode penelitian menggunakan observasional analitik dengan pendekatan cross sectional. Sampel penelitian adalah seluruh habitat perkembangbiakan dan jentik Anopheles spp di Desa Lifuleo, Kecamatan Kupang Barat. Jentik diambil menggunakan pipet, kadar garam diukur menggunakan refractometer, pH diukur menggunakan pH meter dan koordinat diambil menggunakan aplikasi Avenza Maps yang terinstal pada Hand Phone android. Analisis data menggunakan Indeks Moran I dan Spatial Error Model untuk mencari faktor-faktor yang memengaruhi keberadaan jentik Anopheles spp. Spesies Anopheles yang ditemukan diantaranya; An. barbirostris, An. subpictus, An. vagus, An. vagus var limosus, dan An. indefinitus. Seluruh spesies Anopheles hidup pada habitat yang mengandung kadar garam tetapi An. subpictus mampu beradaptasi pada kadar garam tertinggi (48‰). Analisis univariat diperoleh Io sebesar 0.00926. Nilai Coefficient Constant sebesar 0,693868 dengan probability sebesar 0,02252. Spesies Anopheles yang hidup pada air payau yaitu An. barbirostris, An. subpictus, An. indefinitus, An. vagus, An. vagus varietas limosus. Keberadaan jentik Anopheles spp dipengaruhi oleh tipe habitat perkembangbiakan, Anopheles mengisap siang hari, dan adanya tanaman di habitat perkembangbiakan. Kata kunci: Anopheles spp, Desa Lifuleo, karakteristik habitat, spasial

In agriculture sector, the effect of climate change seems to have become inevitable during the last few decades. Hence, the technologies for climate-resilient agriculture (CRA) are probably the best adaptation solutions currently available to improve the resilience of agriculture. The study to access the extent of adoption of CRA technologies by the farmers in the National Innovations in Climate Resilient Agriculture (NICRA) project implemented villages of Suryapet and Khammam districts in Telangana state was conducted during 2021-22. Total 200 farmers from these two districts were selected randomly to evaluate the adoption status of recommended CRA technologies and its association with the respondents’ profile characteristics. The respondents had adopted CRA technologies at medium to high levels with the majority of beneficiaries adopting technologies like deep ploughing, in-situ moisture conservation technologies in cotton and red gram, crop diversification from paddy to jowar and vegetables as a contingent crop, improved variety of paddy Siddhi WGL-44 and improved backyard poultry breeds. The profile characteristics viz., education, annual income, land holding, individual and mass media exposure, economic motivation, risk-taking ability, and innovative proneness had a positive and significant association with the extent of adoption of CRA technologies.

Present study was confined to Kangra district of Himachal Pradesh. In this study Nagrota Bagwan block was selected randomly. A list of farmers, who had borrowed agricultural loan, was obtained from different banks and a sample of 50 beneficiaries was obtained from this block. The existing agricultural credit system in the study area showed that, Punjab National Bank, Himachal Gramin Bank,The Kangra Central Co-operative Bank and State Bank of Patiala, State Bank of India were operating.Overall % accessibility of sampled beneficiaries to the credit indicated that about 90 % of the loan applied was sanctioned by the institutions. Borrowing through Kisan Credit Card was the highest. State Bank of Patiala was the most important source of borrowings. Cost of borrowing was also found to be low. After availing the financial assistance, the investment on the farm machinery and implements increased substantially followed by investment on livestock. The overall change in investment was calculated to be about 28 %. Paddy and potato had the highest shift in area. The area under paddy increased by 30.76 % and 23.52 % in case of potato. Area under maize (HYV) increased by 10 % while in case of vegetable the increase was 14.28 %. Area under maize (local) and wheat decreased by 35.71 % and 14.63 % respectively. Maximum increase in fertilizer application was observed in potato (22.39 %), followed bymaize (21.62 %) and cucumber (18 %). The increase in productivity of cucumber was found to be highest (26.70 %), followed by paddy (15.01 %), potato (15.33 %), and vegetables (12.76 %). Productivity of maize (10 %) increased but in less proportion as compared to other crops. There was substantial increase in milk yield of Cross Bred Cow. The average annual income per household increased by about 10 %. The study recommends that there is a need for more awareness about lending among farmers from the institutional sources. Further, loans through Kisan Credit Card were quite high thus efforts should be made so that maximum farmers have Kisan Credit Card and can avail the bank loans without any difficulty.

Direct-seeding of rice on dry paddy soil could enable large-scale cultivation and cost-savings, but still has some problems including poor seedling establishment caused by low temperature and varied sowing depth. This research was performed to identify weedy rice genetic resources that may help to eliminate the problem of poor seedling establishment in direct-seeded rice on dry paddy soil in temperate regions. The genetic resources screened in this study were 128 genotypes consisting of 92 japonica weedy rices, 24 indica weedy rices, and 12 Korean bred cultivars. On average, weedy rice germplasm had superior abilities to emerge from greater depths than cultivated rices. Coleoptile and mesocotyl lengths were highly positively correlated with the emergence rate. Among the weedy rice germplasm, the japonica weedy rice WD-3 showed the highest level of emergence with the longest coleoptile and mesocotyl. The emergence ability of WD-3 was confirmed in both phytotron and field conditions. In the emerged plants in the field, the mesocotyl elongation increased with increasing burial depth in a logarithmic fashion, and coleoptile extension increased exponentially. The mesocotyl and coleoptile elongated to a length of seed burial depth, indicating that the mesocotyl and coleoptile of WD-3 could induce the safe development of the first leaf of the seedling at the soil surface. Therefore, the elongation habit of the mesocotyl and coleoptile of WD-3 could be one of the most important characteristics for the development of direct-seeding cultivars.

This work was undertaken to evaluate the effect of dietary supplementation of Kamela (Mallotus philippensis) leaf meal as herbal feed additive on nutrients utilization and growth performance of growing crossbred calves. Ten numbers of growing Jersey male cross-bred calves were divided in to two groups (G1 and G2) and were fed individually under stall feeding on a paddy straw based mixed ration (50% paddy straw and 50% concentrate mixture) for 140 days. Two types (C1 and C2) of iso-nitrogenous concentrate mixtures were prepared. Wheat bran in concentrate mixture (C2) of test group (G2) was partially replaced (4 parts w/w) with sun dried ground Mallotus philippensis leaf meal. Experimental calves of test group (G2) fed Mallotus philippensis leaf meal @ 2% of the diet. Daily dry matter intake (g/d) was similar among the calves of two experimental groups. Apparent digestibility of DM, OM, NDF, ADF and cellulose were higher in the Mallotus philippensis leaf meal fed calves (G2). DCP value of the ration was similar while, TDN value of the ration was higher in the calves of Mallotus philippensis leaf meal supplemented group (G2). However, plane of nutrition among the calves of both experimental groups was similar. Average finishing body weight, daily body weight gain, feed conversion efficiency and blood glucose level were higher in Mallotus philippensis leaf fed calves (G2). The results of the study indicated that dietary supplementation Kamela (Mallotus philippensis) leaf meal as herbal feed additive @ 2% of total diet significantly improved the performance in growing male crossbred calves.