期刊论文

中文

水土保持学报

1009-2242

2017

31

4

211-218

10.13870/j.cnki.stbcxb.2017.04.034

国家科技支撑计划项目（2014BAC09B01） 省教育厅平台项目（15K056）

本校为第一机构

为提高我国南方丘陵地区旱地土壤作物种植的氮肥利用率,减少资源浪费和降低环境污染风险,通过采用田间小区定位试验进行土壤养分渗漏观测,研究比较了不施肥处理(T1)、普通尿素处理(T2)以及不同施氮量的控释氮肥处理(T3~T6)的TN、NO_3~--N和NH_4~+-N的流失浓度变化及其损失负荷特征。结果表明:在168~240 kg N/hm~2施氮水平变化内,渗漏水量在3 888~3 948L之间,即施肥量的增加或减少对渗漏体积的影响不显著(P>0.05);控释氮肥处理T3的TN、NO_3~--N和NH_4~+-N的平均流失浓度分别是32.66,29.41,0.26 mg/L,比等氮量施用的T2处理分别降低了24.99%(P

In order to improve the nitrogen use efficiency and reduce the resource waste and the risk of environmental pollution,a study on the leakage loss of controlled release nitrogen fertilizer (CRNF) application in hilly area of South China was conducted.The effects of CRNF (T3~T6)application on nitrogen dynamics and loss of TN,NO_3~--N and NH_4~+-N in leachate water under different treatments in spring maize soil were explored.The results showed that the leakage water was 3 888~3 948Lwhen the nitrogen application rate was 168~240 kg N/hm~2,hence fertilizer application rate had no significant effec...