摘要
通过设置径流小区试验,定位研究不同施肥条件下山核桃林氮磷径流流失特征。结果表明,随着施肥时间的推移,氮磷流失均呈现降低的趋势,氮磷流失以可溶态氮、磷为主,分别占总氮、总磷的79.43%～83.60%和47.65%～75.39%。山核桃专用肥的施用对氮磷养分流失起到了良好的调控作用,与常规施肥(氮、磷流失负荷分别为523.41,36.87g/hm2)相比,山核桃专用肥的撒施和沟施使氮、磷流失负荷分别下降了35.73%,32.37%和43.37%,38.46%,故山核桃专用肥料沟施能有效减少前期氮磷养分流失的风险。
Runoff plots under Carya cathayensis Sarg.stand were established to investigate the effects of different fertilization treatments on runoff losses of nitrogen（N） and phosphorus（P）.The results showed that runoff losses of N and P under Carya cathayensis Sarg.stand were decreased with time of fertilization.The N and P losses were mainly in the forms of water-soluble N and P.Water-soluble N and P accounted for 79.43%～83.60% of total N and 47.65%～75.39% of total P.Special compound fertilizer for Carya cathayensis Sarg.stand had a good role in regulation of runoff losses of N and P.Loss loads of N and P from runoff for the treatment of conventional fertilization were 523.41,36.87 g/hm2,respectively.Broadcast-application of the special compound fertilizer decrease runoff losses of N and P by 35.73% and 32.37%,respectively,whereas furrow-application of the special compound fertilizer decrease runoff losses of N and P by 43.37% and 38.46%,respectively,compared with the treatment of conventional fertilization.Therefore,broadcast-and furrow-application of special compound fertilizer could effectively reduced loss risk of N and P in the former period.
出处
《水土保持学报》
CSCD
北大核心
2012年第1期43-46,52,共5页
Journal of Soil and Water Conservation
基金
国家水体污染控制与治理科技重大专项(2008ZX07101-006)
关键词
山核桃林
山核桃专用肥
沟施
撒施
氮磷径流
Carya cathayensis Sarg.stand
special compound fertilizer
furrow-application
broadcast-application
runoff loss of N and P
