双季晚稻肥料利用率研究

Research on Fertilizer Use Efficiency of Double Cropping Late Rice

[目的]研究安徽省东至县双季晚稻肥料利用率。[方法]2015年在东至县东流、尧渡、官港、昭潭4个乡镇开展双季晚稻肥料利用率试验。[结果]在产量上,配方施肥较常规施肥增产523.35 kg/hm^2,增产率达6.8%;在肥料利用率上,配方施肥氮、磷、钾的利用率分别为35.4%、17.7%和40.1%,常规施肥氮、磷、钾的利用率分别为34.5%、7.4%和24.7%,配方施肥氮、磷、钾的利用率分别比常规施肥氮、磷、钾的利用率提高0.9、10.3和15.4百分点。[结论]配方施肥的肥料用量适宜及配比合理,能达到增产增收的目的,且明显提高肥料利用率。

[Objective] To study fertilizer use efficiency of double cropping late rice in Dongzhi County of Aubui Province. [ Method ] The experiments on fertilizer use efficiency of double cropping late rice were carried out in four towns of Dongliu, Yaodu, Guangang and Zhaotan by the soil and fertilizer sector of Dongzhi County in 2015. [ Result] The results showed that compared with conventional fertilization, soil testing and formu- lated fertilization could increase 523.35 kg/hm^2 on the yield, with the increasing ratio up to 6.8%. On fertilizer use efficiency, the using efficiencies of nitrogen, phosphorus and potassium were 35.4%, 17.7% and 40.1% respectively on formulated fertilization, which were increased by 0.9%, 10.3% and 15.4% compared with the using efficiencies of 34.5%, 7.4% and 24.7% respectively on conventional fertilization. [Concluion] The fertilizer amount and ratio of soil testing and formulated fertilization is reasonable, can increase production and greatly improve the fertilizer utilization ratio.