仙桃市紫云英-早稻肥效研究

目的]通过开展紫云英一早稻肥效试验，合理确定在早稻作物上施用紫云英后化肥减量水平，为指导仙桃市早稻科学施肥提供依据。方法]在早稻田设置紫云英一早稻肥效试验，分析各处理间土壤肥力变动情况和产量差异水平，科学建立施用紫云英后早稻施肥指标。结果]在早稻田施用紫云英，可以降低土壤pH和容重，提升土壤速效氮磷钾和有机质含量，提高早稻的养分利用率和经济效益。结论]在早稻施用紫云英后，以减施20％的化肥效果最好、最佳经济施用量为N115．2kg／hm^2．P2O570．8kg／hm^2．K2O98kg／hm^2。

Study about Fertilizer Efficiency of Astragalus sinicus L. -Early Rice in Xiantao City

Objective] By conducting Astragalus sinicus-early rice experiments, reasonable application of milk vetch on early rice crop fertilizer level, reducing the guidance garden early rice provided the basis for scientific fertilization. Method ] In setting Astmgalus sinicus - early rice experiments, the chics of soil fernhty and yield difference between the groups were analyzed, and scientific apphcatlan of Astragalus st- n/cus - early rice fertilizafi~ index was established. Result] Applied at waseda milk vetch, the soil pH and bulk density were reduced, soil available NPK and organiC; matter content was improve, and the early rice nutrient use efficiency and economic benefits were increased. Conclusion] After the early applieation ofAstragalus sinicus to reduce 20% of the chemical fertilizer effect was the best. The optimum economic a- mount was N 115.2 kg/hm^2, P2O5 70 8 kg/hm^2 and K2O 98kg/hm^2.