太湖不同营养水平湖区沉积物磷形态与生物可利用磷的分布及相互关系  

Distribution of phosphorus fractions and bio-available phosphorus forms and their relationship in the sediments from different regions of Lake Taihu

作　　者：王琦[1] 姜霞[2] 金相灿[2] 徐玉慧[2] 

机构地区：[1]西北农林科技大学 生命科学学院,杨凌712100 [2]中国环境科学研究院 湖泊生态环境创新基地,北京100012

出　　处：《湖泊科学》2006年第2期120-126,共7页Journal of Lake Sciences

基　　金：国家重点基础研究发展规划项目(2002CB412304)资助

摘　　要：采用EDTA螯合剂法和不同的化学提取法,研究了太湖3个不同营养水平湖区中8个位点表层沉积物总磷、各组分磷及生物可利用磷的含量分布,探讨了太湖不同营养水平湖区表层沉积物的释磷潜力和生物可利用磷的来源．结果表明,太湖不同营养水平湖区表层沉积物总磷、无机磷和生物可利用磷含量分布差异较大,且与各湖的营养水平相一致．有机磷含量与有机质和含水率显著相关;沉积物中Fe-P和Ca-P对生物可利用磷的贡献较大,这部分磷具有较大的潜在释放风险．Concentrations of total phosphorus （TP）, their fractions and the bio-available phosphorus （BAP） in the surface sediments from three different regions of Lake Taihu are investigated. In addition, the potential release capacity of P from the surface sediment and their sources were discussed. The concentrations of TP, P fractions and BAP are coincided very well with their trophic states. The concentrations of organic P in the sediments have a good relationship with organic matter and moisture content. BAP is mainly from Fe bound P （Fe-P） and Ca bound P （Ca-P） , which show the highest potential risk of release.

关 键 词：太湖 沉积物 磷形态 生物可利用磷 

分 类 号：X524[环境科学与工程—环境工程]