期刊论文

中文

水土保持学报

1009-2242

2016

30

1

14-19,25

10.13870/j.cnki.stbcxb.2016.01.004

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

本校为第一机构

在自然降雨条件下的南方丘陵山地典型区域田间径流小区进行定点观测,比较了不施肥处理(T1)、普通尿素处理(T2)、控释氮肥处理(T3~T6)的TN、DN、NO_3~--N和NH_4~+-N的流失浓度变化及其损失负荷特征,为有效控制旱地氮素径流损失从施肥管理角度提供借鉴。结果表明,在168~240kg/hm~2施氮水平变化内,施肥量的增加或减少对径流量的影响不显著(P>0.05);与施用普通尿素处理(T2)相比,等氮量的控释氮肥处理(T3)的TN、DN、NO_3~--N和NH_4~+-N的平均流失浓度及损失负荷变化无显著差异(P>0.05),当控释氮肥施氮量减少20%时,TN平均流失浓度降低达极显著水平(P

Based on the location observation in runoff plots of upland filed in the typical southern hilly mountainous area under the natural rainfall condition,this study explored the effects of controlled release nitrogen fertilizer(CRNF)application on dynamics and losses of TN,DN,NO_3~ --N and NH_4~+-N in surface runoff in different treatments of spring maize filed,which provided reference for the effective control of nitrogen loss in dry land from the perspective of fertilization management.The results showed that increasing or decreasing fertilization amount did not significantly affect runoff amoun...