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根据多年定位试验(2008—2013年),研究了紫云英还田对作物产量及稳定性的影响,讨论了双季稻产量与土壤养分变化的相关性。结果表明:多年定位试验中,早稻紫云英还田可以显著提高早稻产量,同时对晚稻产量的提高也存在显著后效;早稻紫云英还田减小了双季稻产量年度间变异系数,使水稻产量更为稳定;多年水稻产量随着土壤肥力提高而提高,早稻紫云英还田对土壤的培肥是水稻产量增长、产量稳定性提高的主要影响因素;等量氮素投入情况下,紫云英氮对土壤全氮、有机质的提升作用显著高于化肥氮;可见紫云英作为绿肥,同时兼有提供当季速效养分效果和培肥土壤的长期作用;紫云英作为绿肥还田不仅提高了水稻产量,同时通过提升稻田土壤肥力,进而使稻田生产力更加稳定。
According to the multi-year experiment (2008-2013), the effect of Astragalus sinicus on crop yield and stability was studied, and the relationship between double cropping rice yield and soil nutrient change was discussed. The results showed that the early locust could increase the yield of early rice and increase the yield of late rice in later years. The early variation of the yield of double - So that the yield of rice was more stable. For many years, the yield of rice increased with the increase of soil fertility. The fertilization of soil by the treatment of Astragalus sinvatum was the main factor affecting the increase of rice yield and yield stability. When the same amount of nitrogen was input , Asparagus nitrogen on soil total nitrogen, organic matter was significantly higher than the role of nitrogen fertilizer; visible Asiatica as a green manure at the same time provide both seasonal quick-acting nutrients and fertilize the long-term effect of soil; Asparagus Tian not only increased rice production, but also made paddy field more stable by increasing soil fertility.