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《Journal of Anhui Agricultural Sciences》 2010-02
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Phosphorus Forms in Sediment of Ponds around Chao Lake and Their Spatial Variation.

MA Xiu-ling et al(School of Life Science,Anhui University,Hefei,Anhui 230039)  
Total phosphorus(TP),inorganic-phosphorus(IP),organic-phosphorus(OP),Fe/Al-bound phosphorus(Fe/Al-P) and Ca-bound phosphorus(Ca-P) in surface sediment of 138 ponds around Chao Lakes were measured,using the standard measurement and test(SMT) procedure of phosphorus forms in the freshwater sediments.And the spatial difference of phosphorus forms in pond sediment from Chao Lake watershed was also characterized.Correlation coefficients between phosphorus forms and loss of ignition were analyzed.The results showed that the contents of TP,IP,OP,Fe/Al-P and Ca-P in surface sediment of ponds varied from 536.04-3 659.89,153.55-3 299.15,176.68-1 076.16,96.19-876.17 and 105.29-880.22 mg/kg,respectively.The contents of TP,IP,OP,Fe/Al-P and Ca-P in surface sediment of ponds were generally higher than that of Chao Lake.The IP,OP,Fe/Al-P and Ca-P in surface sediment of ponds accounted for 13.4%-90.14%,10.86%-93.91%,8.81%-45.69% and 12.86%-61.05% of TP,respectively.The contents of phosphorus forms in surface sediment of ponds from different sampling area displayed significant difference.The TP and IP in surface sediment of ponds from Yicheng,Sanhe,Huancheng-Zhegao,Zhonghan,Tongyang and Huailin-Shengqiao were higher than that from Yandian,Muji,Huanglu and Zhongmiao-Liujiafan.The contents of OP in surface sediment of ponds from Sanhe and Huancheng-Zhegao were higher than that from Baishan.The contents of Fe/Al-P in surface sediment of ponds from Huailin-Shengqiao and Tongyang were higher than that from Huanglu and Zhongmiao-Liujiafan.And the contents of Ca-P in surface sediment of ponds from Baisan and Changlin were higher than that from other areas.Loss of ignition of surface sediment was significantly and positively correlated to TP(r=0.286),OP(r=0.241),Fe/Al-P(r=0.314) and to Ca-P(r=0.210).And TP was also significantly and positively correlated to IP(r=0.929),OP(r=0.247),Fe/Al-P(r=0.807)and to Ca-P(r=0.632).However,there was not significant correlation between OP and IP,Fe/Al-P,and Ca-P.
【Fund】: 巢湖水污染治理与富营养化综合控制技术及工程示范项目(2008ZX07103);; 安徽生态省建设办公室科技攻关项目
【CateGory Index】: X524
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