种植绿肥与化肥减量对水稻产量和土壤养分含量的影响

Effect of Planting Green Fertilizer and Reducing Chemical Fertilizer on Rice Yield and Soil Nutrient Content

在江口县通过田间对比试验研究了种植绿肥与化肥减量对水稻产量和土壤养分含量等影响。结果表明:水稻前茬种植绿肥紫云英,常规施肥化肥减量15%的稻谷产量比对照增产0.2%,土壤pH降低1.03,有机质增加31%,全氮增加6.17%,解碱氮增加19.59%,但全磷和有效磷分别降低20%和17.46%。说明种植豆科绿肥能增加土壤有机质和氮肥的含量,对减少化肥使用量,提高土壤有机质含量,改善土壤理化性状,提高土壤肥力和水稻产量,增加经济效益,减轻农业面源污染具有重要意义。

The effects of green fertilizer and fertilizer reduction on rice yield and soil nutrient content were studied in Jiangkou Coun‐ty.The results showed that the yield of rice with a 15%reduction in conventional fertilizer was 0.2%higher than that of the control,the soil pH decreased by 1.03,organic matter increased by 31%,total nitrogen increased by 6.17%,alkaline nitrogen increased by 19.59%,but total phosphorus and available phosphorus decreased by 20%and 17.46%,respectively.The results indicated that plant‐ing legume green fertilizer could increase the content of soil organic matter and nitrogen fertilizer,which was of great significance for reducing the use of chemical fertilizer,increasing the content of soil organic matter,improving soil physical and chemical proper‐ties,increasing soil fertility and rice yield,increasing economic benefits,and reducing agricultural non-point source pollution.