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引用本文:朱元荣,张润宇,吴丰昌,傅平青.贵州红枫湖沉积物生物可利用磷分布特征及其与粒径的关系.湖泊科学,2010,22(4):513-520. DOI:10.18307/2010.0406
ZHU Yuanrong,ZHANG Runyu,WU Fengchang,FU Pingqing.Distribution of bioavailable phosphorus and their relationship with particle size in sedi-ments of Lake Hongfeng,Guizhou Province. J. Lake Sci.2010,22(4):513-520. DOI:10.18307/2010.0406
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贵州红枫湖沉积物生物可利用磷分布特征及其与粒径的关系
朱元荣1,2, 张润宇1, 吴丰昌3, 傅平青1
1.中国科学院地球化学研究所环境地球化学国家重点实验室 贵阳 550002;2.中国科学院研究生院 北京 100049;3.中国环境科学研究院国家环境保护湖泊污染控制重点实验室 北京 100012
摘要:
应用化学提取法分析了红枫湖主要出入湖河口及湖心沉积物生物可利用磷(BAP)的含量,并探讨了BAP空间分布与总磷(TP)和粒度组成之间的关系.研究结果表明,各形态BAP含量顺序为:藻类可利用磷(AAP)>NaHCO3可提取磷(Olsen-P)>水溶性磷(WSP)>易解吸磷(RDP).沉积物柱芯中BAP迅速降低,剖面变化比TP更为明显.各形态BAP与TP显著相关,除RDP与AAP外,其它形态BAP之间也显著相关.Olsen-P是评价红枫湖沉积物磷的生物有效性的最佳指标.红枫湖沉积物颗粒组成以粘土及粉砂为主,湖心沉积物比河口粒度小.表层(0-5cm)沉积物中Olsen-P和AAP的含量与细组分(粘土)的比例呈正相关,而RDP、WSP与细组分呈负相关性,表明沉积物细组分对深水湖泊富营养化的重要性.
关键词:  沉积物  生物可利用磷  粒径  空间分布  深水湖泊  红枫湖
DOI:10.18307/2010.0406
分类号:
基金项目:国家重点基础研究发展规划项目(2008CB418200);贵州省科学技术基金项目(黔科合J字[2008]2226号)资助
Distribution of bioavailable phosphorus and their relationship with particle size in sedi-ments of Lake Hongfeng,Guizhou Province
ZHU Yuanrong1,2, ZHANG Runyu1, WU Fengchang3, FU Pingqing1
1.State Key Laboratory of Environment Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, P. R. China;2.Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China;3.State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, P. R. China
Abstract:
The contents of bioavailable phosphorus (BAP) in sediments from the centre of Lake Hongfeng,Guizhou Province and its main estuaries were analyzed by chemical extraction, and the relationships between spatial distribution of the BAP and size compo-sition of the total phosphorus (TP)were also discussed. Results showed that rank orders of the BAP forms was;Algal Available Phosphorus (AAP)>NaHC03 extractable phosphorus(Olsen-P )>Water Soluble Phosphorus(WSP )>Readily Desorbable Phosphorus(RDP). The variation trend of the BAP with decreasing drastically downward in the sediment core was more remarkable than that of TP. There were multiply correlation among various BAP forms and TP, except for RDP and AAP. Olsen-P was the best index to evaluate phosphorus bioavailability in sediments from Lake Hongfeng. Clay and silt were the main sediment fractions, while the sediment particle size in the centre part were smaller than those in estuaries. Olsen-P and AAP in the top Scm sediments of the core were positively correlated to the proportion of fine fraction (< 0. 002mm ),whereas RDP and WSP were negatively correlated to, suggesting that the fine fraction has an important contribution for promoting eutrophication in deep lakes.
Key words:  Sediment  bioavailable phosphorus  particle size  spatial distribution  deep lake  Lake Hongfeng
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