Effects of Green Manure Milk Vetch and Fertilizer Combined Application on the Growth and Yield of Rice in Double-cropping Rice Areas

[Objective] Effect of combined application of Chinese Milk Vetch and fertilizer on rice yield and yield components were studied under the Chinese Milk Vetch-Rice rotation system in double cropping rice area.[Method] Obtained from field position experiments of fertilization effects of early rice and late rice,the relationships between yield components and different fertilizer treatment were investigated.[Result] Application of fertilizer improved rice growing and increased the yield of rice.The yield of rice was also increased obviously by the combination of green manure and fertilizer.The yield of late rice was the highest when 40% fertilizer combined with 60% green manure,however,those applications of late rice in 2008 and early rice in 2009 would significantly increase yield in comparison with 100% chemical fertilizers.The average yield of early rice for these two years increased 247 kg/hm2 and 3.8% compared with 100% fertilizer application.[Conclusion] Incorporating Chinese Milk Vetch could partially replace chemical fertilizer,improve rice yield,save the production cost,raise the efficiency of organic-inorganic nutrient resources.