绿肥紫云英与化肥配施对双季稻区水稻生长及产量的影响

目的]在双季稻区紫云英与水稻轮作制度下,探讨化肥配施紫云英对水稻产量及其构成因素的影响。方法]采用田间定位方法,进行早稻和晚稻施肥效应试验,探讨水稻产量构成因素与不同施肥处理的关系。结果]施肥可促进水稻生长和产量提高,化肥配施绿肥也能够显著地增加水稻产量。早稻化肥减量40%配施60%绿肥处理的下茬晚稻产量最高,而2008年晚稻以及2009早稻产量甚至显著高于100%化肥处理,2年早稻平均产量比100%化肥处理增加了247 kg/hm2,提高了3.8%。结论]种植和利用紫云英可部分替代化学肥料,提高水稻产量,节约生产成本,提高有机-无机养分资源利用效率。

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.