水利学报2017，Vol.48Issue(3)：291-298,8.DOI:10.13243/j.cnki.slxb.20160792
生态塘对稻田降雨径流中氮磷的拦截效应研究
Study on the interception effects of ecological pond on Nitrogen and Phosphorus in the rainfall runoff of rice field
摘要
Abstract
The ecological pond has double effects on drainage and ecological wetland.With huge loss of farmland nutrient becoming one of the main sources of agricultural non-point source pollution,it is significant to study the interception effects of ecological pond on nitrogen and phosphorus in the rainfall runoff of rice field and the removal effect on nitrogen and phosphorus in static water.In this paper,the ecological pond was built based on the transformation of natural pond,and the interception effects of ecological pond on nitrogen and phosphorus in the three rainfall runoff events happened in rice growth periods was studied.What's more,the removal effects of ecological pond on nitrogen and phosphorus under stationary state of the ecological pond water was also studied.The results show that:(1) in the process of three different rainfall events,the average removal rate of total nitrogen (TN) and total phosphorus (TP) by ecological ditch are 34.7％ and 34.8％ respectively;(2) the sort order of nitrogen and phosphorus removal rate by ecological ditch is ammonia nitrogen (NH4+-N) ＞ grain nitrogen (PN) ＞ nitrate nitrogen(NO3--N) and particles phosphorus (PP) ＞ dissolved phosphorus (DP),and the concentration of nitrogen and phosphorus in different water body vertical stratifications are varied during rainfall runoff,but the concentration of nitrogen and phosphorus in the underlying water body is mostly greater than that in the surface water body;(3) after the rainfall runoff,the removal rate of TN and TP in ecological pond are 50.4％ and 52.3％ respectively,and the removal rate of pond 2 on TN and TP is greater than pond 1 and pond 3,indicating that the ecological pond has a strong self-repairing ability.关键词
稻田/生态塘/氮磷/降雨径流/垂向分层/拦截效应Key words
paddy field/ecological pond/nitrogen and phosphorus/rainfall runoff/stratified vertically/interception effect分类
农业科技引用本文复制引用
王晓玲,李建生,李松敏,郑晓通,张福超..生态塘对稻田降雨径流中氮磷的拦截效应研究[J].水利学报,2017,48(3):291-298,8.基金项目
国家自然科学基金创新研究群体科学基金(51621092) （51621092）
水体污染控制与治理国家科技重大专项(2012ZX07101-008) （2012ZX07101-008）
天津市应用基础与前沿技术研究计划(16JCYBJC23100) （16JCYBJC23100）
