期刊论文

中文

水土保持学报

1009-2242

2015

29

5

70-74

10.13870/j.cnki.stbcxb.2015.05.014

国家“十二五”科技支撑计划项目（2012BAD15B04,2014BAC09B01） 湖南省高校创新平台开放基金项目（14K047,14K048）

本校为第一机构

通过长期定位试验研究了控释尿素不同施用量对双季稻田氮素的径流和渗漏损失的影响,以期为控释肥的推广和农业面源污染的减少提供科学依据。结果表明,施肥量是决定稻田氮素径流和渗漏损失的主要因子之一,控释尿素减量施用能显著降低稻田氮素径流与渗漏损失。施肥初期稻田氮素流失量最大,是控制双季稻田氮素流失的关键时期。NH_4~+-N与NO_3~--N径流损失量占稻田全氮径流损失量的50%左右,稻田渗漏损失以NO_3~--N为主,占全氮渗漏损失的70%以上。控释尿素各处理中以减氮30%处理效果最好,能显著减少稻田的氮素流失量。其与普通尿素相比,稻田TN、NH_4~+-N、NO_3~--N径流损失量分别减少30.56%,23.41%,1...

In this research,a long-term experiment was conducted to study the effect of reduced application of controlled released urea on nitrogen runoff and leakage loss in double cropping paddy field,expecting to promote the application of controlled release fertilizer and provide scientific basis for controlling non-point source pollution.The results showed that the amount of fertilizer application was one critical factor to decide nitrogen runoff and leakage loss in double cropping paddy field,and the runoff and leakage loss were significantly reduce...