化肥与紫云英不同配比对水稻养分吸收及产量的影响

Effects of Combined Application of Chemical Fertilizer and Astragalus sinicus on Nutrient Absorption and Yield of Rice

在大田试验条件下,设计5个不同化肥与紫云英配比处理,连续2年在江西省丰城市研究了养分总供应量相同时紫云英NK代替等量化肥NK对水稻养分吸收及其产量的影响.结果表明:等氮钾条件下,与单施化肥相比,20%～40%紫云英氮钾替代等量化肥氮钾有利于土壤中有机质含量的提高,促进水稻地上部对氮钾的吸收与累积,从而有利于水稻产量的提高.但是,60%～80%紫云英氮钾替代化肥氮钾,水稻地上部氮钾含量和水稻产量显著下降.因此,化肥/紫云英适当配比施用有利于提高土壤有机质含量,促进水稻对氮钾养分的吸收累积,最终提高水稻产量.

A 2-year field experiment was carried out to study the effects of the combined application of chemical fertilizer and Astragalus sinicus on the nutrient absorption and yield of rice under the condition of applying equivalent N,K content.The results showed that replacing 20%～40% of chemical fertilizer-NK with equivalent green manure-NK was in favor of increasing the content of organic matter in the soil,the accumulation of N,K in the aboveground part of rice,and the yield of rice.But replacing 60%~80% of chemical fertilizer-NK with equivalent green manure-NK could significantly decrease the accumulation of N,K nutrient in the aboveground part of rice and rice yield.So,the reasonable combined application of chemical fertilizer and A.sinicus was propitious to increase the content of organic matter in the soil,promote the accumulation of N,K nutrient in rice plants and enhance the yield of rice.