Study on Vegetable Field Evaluation Index System for Non-Point Source Pollution of Dagu River Basin
(0) This research combined data from soil, terrain and meteorological surveys, with quantitative data from soil and water field studies to determine the leaching processes of nitrogen and phosphorus contaminants from field vegeta-tion into the Dagu River. Using the Gray correlation analysis method, precipita-tion and irrigation were established as the major driving force behind leaching losses from cultivated land. The type of fertilizers used, and the chemical and physical properties (porosity and bulk density) of soils in the region were set as parent sequences. COD values of nitrogen and phosphorus concentration were calculated from soil and water samples. Also, the depth of core samples was factored into the analysis. The result showed that the supply of soil nitrogen and phosphorus, which were mainly derived from fertilizers, were not generally high levels in Qingdao. According to fuzzy association degree, this investgation con-firmed main influencing factors which affected COD, total nitrogen, total phosphorus of soil and groundwater, ammonia nitrogen and nitrate nitrogen of ground water respectively. And according to these factors the initial vegetable field evaluation index system for non-point source pollution of Dagu River basin was constructed.
Gray correlation analysis Nitrogen Phosphorus COD Precipita-tion Soil physical properties Soil type Index system
Jinheng Zhang Junqiang Wang Yongliang Lv Jianting Liu Dapeng Li Zhenxuan Yao Xi Jiang Ying Liu
Institute of Eco-environment & Agriculture Information,School of Environment and Safety Engineering, Qingdao Station for Popularizing Agricultural Techniques, Qingdao, Shandong 266000, China
国际会议
南昌
英文
706-715
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）