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首页> 外文期刊>The Indian Journal of Agronomy >Effect of nutrient sources on grain yield, methane emission and water productivity of rice (Oryza sativa) under different methods of cultivation
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Effect of nutrient sources on grain yield, methane emission and water productivity of rice (Oryza sativa) under different methods of cultivation

机译：不同栽培方式下养分来源对水稻产量，甲烷排放和水分生产率的影响

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摘要

A field experiment was conducted during the rainy seasons of 2012 and 2013 at Zonal Agricultural Research Station, Mandya, to study the sources of nutrient on yield, methane emission, and water productivity of rice (Oryza sativa L) under different methods of cultivation. Among the different methods of rice cultivation, system of rice intensification (SRI) method recorded higher water productivity (54.3 kg/ha-cm) than aerobic method (46.6 kg/ha-cm) and conventional method (29.9 kg/ha-cm) and resultedto the higher grain and straw yields of rice (8.55 and 10.07 t/ha) than the other methods of rice cultivation like conventional (7.05 and 8.38 t/ha) and aerobic method (6.48 and 7.83 t/ha). Among the sources of nutrients, application of recommended doseof fertilizer (100% N through neem-coated urea) recorded higher grain and straw yields (8.49 and 9.83 t/ha) over the other sources of nutrients, whereas the aerobic method of rice cultivation recorded lower methane emission (3.95 mg/plant/day) and totalmethane production (24.2 kg/ha) than SRI method (4.42 mg/plant/day and 28.1 kg/ha) and conventional method (6.25 mg/plant/day and 80.7 kg/ha) 90 days after sowing (DAS). Among the sources of nutrients, application of recommended dose of fertilizer (100%neem coated urea) recorded significantly lesser methane emission (4.35 mg/plant/day) and total methane production (37.9 kg/ha) than the other sources of nutrients but higher methane emission and production resulted by application of 50% N through paddy straw incorporation + 50% N through urea + recommended dose of P and K (5.56 mg/plant/day and 50.5 kg/ha) 90 days after sowing.
机译：在2012年和2013年的雨季期间，在曼迪亚的Zonal农业研究站进行了田间试验，研究了不同栽培方法下水稻（Oryza sativa L）的养分来源，产量，甲烷排放和水分生产率。在不同的水稻栽培方法中，水稻强化系统（SRI）的水生产率（54.3 kg / ha-cm）高于有氧法（46.6 kg / ha-cm）和常规方法（29.9 kg / ha-cm）与传统的7.05和8.38 t / ha和有氧法6.48和7.83 t / ha的其他水稻种植方法相比，水稻的稻谷和稻草产量更高（8.55和10.07 t / ha）。在养分来源中，施用推荐剂量的肥料（通过印em包膜的尿素100％N）比其他养分来源记录的谷物和稻草单产更高（8.49和9.83 t / ha），而水稻的需氧栽培方法与SRI方法（4.42 mg /工厂/天和28.1 kg / ha）和传统方法（6.25 mg /工厂/天和80.7 kg / kg）相比，甲烷排放量（3.95 mg /工厂/天）和甲烷总产量（24.2 kg / ha）低ha）播种后90天（DAS）。在养分来源中，施用推荐剂量的肥料（100％印coated包膜尿素）的甲烷排放量（4.35毫克/植物/天）和甲烷总产量（37.9千克/公顷）明显低于其他养分来源，但更高播种90天后，通过稻草秸秆施用50％N +通过尿素施用50％N +推荐的P和K剂量（5.56 mg /株/天和50.5 kg / ha）导致甲烷排放和生产。

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