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《Guizhou Agricultural Sciences》 2011-04
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Distribution Characteristics and Release Regularities of Nutrients in Sediments in Huangshahe River Riparian Zone

LI Wen-jing,ZHANG Tai-ping*,KUANG Chen-kun(College of Environmental Science and Engineering,South China University of Technology,Guangzhou,Guangdong 510006,China)  
The pollution characteristics and spatial distribution regularities of nutrients in surface sediment columns(0~15 cm) at three sites located in Huangshahe river riparian zone were studied and the migration direction and emission flux of nutrients were also analyzed by using undisturbed soil columns to know the release regularity of nutrients in sediments in Huangshahe river riparian zone.The results showed that distribution of organic matters in sediments was significantly different with that of nutrients.The contents of total phosphorus and organic matters increased vertically from the bottom to surface of the sediment columns,and the contents of total nitrogen and organic matters decreased horizontally from S1 to S3;nutrients migration direction was decided by water potential,Nutrient released from sediments was mainly dissoluble nutrient no matter the water potential was upward or downward,and the nutrients release would increase with the increase of water pressure;The release capability of nutrients was not only determined by nutrient level of sediment,but also affected by physico-chemical property of sediments.
【Fund】: 国家水体污染控制与治理科技重大专项“东江下游优化发展都市区水污染系统控制与工程示范”(2008ZX07211-006)
【CateGory Index】: X142
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