WANG Jingfu¹, CHEN Jingan¹, YANG haiquan^1,2, LI Jian³, DAI Zhihui⁴

（1.State Key Laboratory of Environmental Geochemistry, Guiyang 550081 China;
2.University of Chinese Academy of Sciences, Beijing 100049 China;
3.Jinan Environmental Monitoring Center Station, Jinan 250014 China;
4.State Key Laboratory of Ore Deposit Geochemistry, Guiyang 550081 China）

Abstract: Bioavailability of phosphorus in sediments from Lake Hongfeng, an artificial deep-water lake in Southwestern China was investigated. Results show that the concentrations of bioavailable phosphorus in sediments are in the order of Algal Available Phosphorus (AAP)>NaHCO3-P (Olsen-P)> Water Soluble Phosphorus (WSP), with mean values of 323, 61.2, and 3.1 mg/kg, respectively. Concentration of BAP is the highest in surface sediments, implying a great risk of the release of internal phosphorus. Correlation analysis shows that NH4Cl-P and BD-P may be important source of bioavailable phosphorus in sediments. The results can provide critical information on release control of endogenous phosphorus in Lake Hongfeng.

Key words: sediment; phosphorus; bioavailability; Lake Hongfeng

EARTH AND ENVIRONMENT Vol.44, No.4 Tot No.312, 2016, Page 437-440