免耕稻田土壤磷有效性的研究

摘要

[目的]为提高免耕稻田磷肥的利用效率.[方法]以免耕和翻耕稻田为研究对象,通过大田试验与室内分析研究了稻田土壤磷有效性.[结果]随着土层的加深,土壤有效磷含量降低.免耕使得土壤有效磷在土壤表层富集.与耕作相比较,施肥对土壤有效磷含量的影响高于耕作.[结论]免耕比翻耕更能合理利用肥料,提高磷肥利用率.%[Objective] The research aimed to improve the use efficiency of fertilizer in no-tillage paddy field. [Method] field experiments and laboratory analysis were conducted to determine phosphorus effectiveness of no-tillage soils in paddy field. [ Result] AP descended with soil emboldening. AP in the soil surface was enriched by no-tillage. Compared with cultivation, the effects of fertilizer on AP were higher. [ Conclusion ] No tillage could use fertilizer reasonably,and improve P fertilizer utilization rate.