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首页> 外文期刊>Field Crops Research >Substitution of fertilizer-N by green manure improves the sustainability of yield in double-rice cropping system in south China
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Substitution of fertilizer-N by green manure improves the sustainability of yield in double-rice cropping system in south China

机译：绿肥替代氮肥提高了华南双季稻种植系统的单产可持续性

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Rice-rice rotation is the most important intensive cropping system for food security in China. So far, few studies have examined sustainability of double-rice cropping system using partial substitution of fertilizer N (FN) by green manure (GM). The effects of 100% FN (N-100) and different substitution rates of FN by GM (80%, 60%, 40% and 20% FN plus 20%, 40%, 60% and 80% N through GM, and represented respectively by N80M20, N60M40, N40M60 and N20M80) on the rice productivity and N-supplying capacity of paddy soil were evaluated in double-rice system from 2008 to 2013. Soil organic matter and total N content in the 0-15 cm layer and rice grain yield of early and late rice annually increased in N80M20 and N60M40 plots, but decreased in N-100, N40M60 and N20M80 plots. Compared with N-100 plots, the NH4+-N content and agronomic efficiency of applied N significantly increased in N80M20 and N60M40 plots. The grain yield and sustainable yield index of rice crops were improved in N80M20 and N60M40 plots, while declined in N40M60 and N20M80. Soil NO3--N content decreased significantly under partial substitutions of GM for FN. It can be concluded that the appropriate substitution of GM for FN (e.g., 20-40%) is beneficial for improving the productivity and sustainability of paddy field under double-rice cropping system. (C) 2016 Elsevier B.V. All rights reserved.
机译：稻米轮作是中国粮食安全最重要的集约化耕作制度。到目前为止，很少有研究检验使用绿肥（GM）部分替代肥料N（FN）的双季稻种植系统的可持续性。 GM对100％FN（N-100）和不同FN替代率的影响（80％，60％，40％和20％FN加GM通过20％，40％，60％和80％N的影响，并表示用N80M20，N60M40，N40M60和N20M80）分别于2008年至2013年在双水稻体系上对水稻的水稻生产力和N供给能力进行了评估。土壤有机质和0-15 cm层和水稻中的总N含量在N80M20和N60M40地块，早稻和晚稻的籽粒产量每年增加，但在N-100，N40M60和N20M80地块的稻谷产量每年减少。与N-100样地相比，N80M20和N60M40样地中NH4 + -N含量和施用氮素的农艺效率显着提高。 N80M20和N60M40地块水稻产量和可持续产量指数有所提高，而N40M60和N20M80则有所下降。在部分替代FN的情况下，土壤NO3--N含量显着下降。可以得出结论，在双水稻种植系统下，适当地用GM替代FN（例如20-40％）有利于提高稻田的生产力和可持续性。 （C）2016 Elsevier B.V.保留所有权利。

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