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为探索冬季绿色作物覆盖对水稻生长和土壤养分变化的影响,采用田间小区试验研究了冬季种植紫云英和黑麦草对双季稻田水稻产量和土壤养分含量的影响。结果表明:冬季种植紫云英和黑麦草能促进水稻增产,比冬闲全年水稻产量分别增产5.3%和6.3%。一个生产周期之后,冬季种植紫云英和黑麦草处理的土壤有机质、全氮、速效氮磷钾含量均有一定提高,有较好的培肥土壤效果。
In order to explore the effect of green crop cover in winter on the changes of rice growth and soil nutrients, field trials were conducted to study the effects of winter-planting milk vetch and ryegrass on rice yield and soil nutrient content in double cropping paddy fields. The results showed that the cultivation of Astragalus sinicus and ryegrass in winter could increase the yield of rice and increase the yield of rice by 5.3% and 6.3% respectively, compared with the annual yield of winter and fallow. After a production cycle, soil organic matter, total nitrogen and available nitrogen, phosphorus, and potassium content of soil planted with Aster and ryegrass in winter increased to a certain extent, and soil fertility was better.