摘要
在昆明市松华坝水源区牧羊河中游坡耕地布设反坡水平阶与对照径流小区,观测2种径流小区的径流量、泥沙量、总氮及总磷输出浓度和输出量。结果表明:与对照相比,反坡水平阶径流量减少34.14%、土壤流失量减少57.17%、总氮和总磷输出量分别减少33.32%和33.82%。坡耕地修反坡水平阶起到了较明显的保水、保土、保肥作用,对控制面源污染物具有重要意义。
Based on the observation of runoff plots on sloping land in Muyang river middle stream of Songhuaba Reservoir in Kunming,the runoff amount,soil loss amount,output concentrations and output of the total nitrogen and total phosphorus in runoff plots were investigated.The results indicated that compared with the control study,runoff amount reduced 34.14%,soil loss amount reduced 57.17%,total Nitrogen and total Phosphorus output reduced 33.32% and 33.82% respectively, from plot under horizontal stage.The construction of horizontal stage on sloping land played a more obvious effect on soil and water conservation and fertilizer conservation,and it had a great significance for controlling the non-point source pollution matter.
出处
《中国水土保持科学》
CSCD
2010年第5期119-124,共6页
Science of Soil and Water Conservation
基金
国家自然科学基金项目"微区域集水系统控制云南山区农业面源污染"(30660037)
云南省自然科学基金项目"微区域集水系统控制山区农业面源污染控制"(2006D0041M)
云南省科技计划项目"松华坝环境保护域污染综合治理技术"(2006SG20)
西南林业大学水土保持重点学科建设项目
