紫云英还田减量施用化肥对水稻产量的影响

摘要

Field experiment was conducted to investigate the effect of returning milk vetch to soil and reducing application of chemical fertilizer on the growth and yield of rice.The result showed that the yield of later-cropping rice and economic benefit decreased,if the field treated only with returning milk vetch.In the treatments combined with returning milk vetch and chemical fertilizer with reduced amounts by 40%-60%,the rice yield and economic benefit were higher than those of only chemical fertilizer treatment.The treatment with milk vetch and 60% chemical fertilizer showed the highest yield and economic benefit of rice,where the yield of rice increased 6.3% and the economic yield increased 10.0% than the treatment of chemical fertilizer alone.%通过大田试验研究了翻压紫云英、不同化肥减量水平对水稻生长、产量的影响,结果表明：紫云英翻压后,若不配合施用化肥,后茬水稻产量、经济效益降低;在翻压紫云英、化肥减量40%～60%的条件下,后茬水稻产量、经济效益高于单施化肥处理,其中紫云英＋60%化肥处理水稻产量、经济效益最高,与纯化肥处理相比,水稻增产6.3%,经济效益提高10.0%。