Effects of Controlled Drainage on TN and TP Concentration in Surface Runoff

摘要：

This study was conducted to determine a surface runoff controlled drainage which reduced nitrogen and phosphorus losses from arable land.A field experimental project in flat topography was set up in southern China Jiangsu Province to monitor the concentration of nitrogen and phosphorus in the surface runoff.When cropland is covered with surface water caused by heavy rain,controlled drainage made it possible to reduce concentration of nitrogen and phosphorus by making surface water stay in the cropland for period of time.The surface runoff controlled drainage reduced drain flow by 12.7% compared with non-controlled drainage.The concentration of total nitrogen(TN) in non-controlled drainage is 10.55mg/L,only 5.1mg/L in controlled drainage.The concentration of total phosphor(TP) in non-controlled drainage is 8.48mg/L,only 4.4mg/L in controlled drainage.The loss of TN in non-controlled drainage is 516.7mg/m2,only 222mg/m2 in controlled drainage.The loss of TP in non-controlled drainage is 413.8mg/m2,only 191.6mg/m2 in controlled drainage.

关键词： TN and TP concentration controlled drainage non-point pollution

作者: Yin Guoxi Zhang Zhanyu Guo Xiangping Shao Guangcheng

作者单位: Department of Agriculture Engineering,Hohai University,Nanjing,210098,China

会议类型: 国际会议

会议名称: International Conference on Effective Utilization of Agricultural Soil & Water Resources and Protection of Environment and the 4th Annual Academic Conference of Chinese Society of Agricultural Soil and Water Engineering

会议地点: 南京

会议语种:英文

页码: 183-186

在线出版日期: 2006-08-16（万方平台首次上网日期，不代表论文的发表时间）