长江中下游浅水湖泊表层沉积物潜在可交换性磷研究

doi:10.11821/yj2007010015

地理研究 ›› 2007, Vol. 26 ›› Issue (1): 117-124.doi: 10.11821/yj2007010015

长江中下游浅水湖泊表层沉积物潜在可交换性磷研究

步青云, 金相灿, 王圣瑞

中国环境科学研究院湖泊生态环境研究中心,国家环境保护湖泊污染控制重点实验室,北京 100012

收稿日期:2006-01-15 修回日期:2006-07-18 出版日期:2007-01-25 发布日期:2007-01-25
作者简介:步青云 (1978-),男,辽宁阜新人,硕士。主要从事湖泊富营养化研究。Email :pbqy_2002@ sohu.com *通讯作者 : 金相灿(1945-),男,浙江义乌人,研究员。主要从事湖泊富营养化研究。 Email :Jinxiang@public.bta.net.cn
基金资助:
国家重点基础研究发展规划项目"湖泊富营养化过程与蓝藻水华暴发机理研究"(2002CB412304)

Study of the potential exchangeable phosphorus in sediments of shallow lakes in the middle and lower Yangtze River

BU Qing-yun, JIN Xiang-can, WANG Sheng-rui

Research Center of Lake Environment, Chinese Research Academy of Environment Sciences, State Environmental Protection Key laboratory for Lake Pollution Control, Beijing 100012, China

Received:2006-01-15 Revised:2006-07-18 Online:2007-01-25 Published:2007-01-25
Supported by:
国家重点基础研究发展规划项目"湖泊富营养化过程与蓝藻水华暴发机理研究"(2002CB412304)

摘要/Abstract

摘要： 利用无限稀释外推法 (IDE法 )和Hieltjes与Lijklema提出的H-L法对长江中下游浅水湖泊表层沉积物中可交换性磷进行测定,研究了IDE法测定的潜在可交换性磷 (IDE-P )与H-L法使用NH₄Cl测定的氯化铵磷 (NH₄Cl-P )在不同污染程度沉积物中的分布规律及二者关系,并对IDE-P和NH₄Cl-P与沉积物土壤测试磷 (STP)、磷吸附饱和度 (DPS)、总磷 (TP)和有机质关系进行讨论。结果表明,沉积物IDE-P和NH₄Cl-P分布遵循重污染沉积物>污染较轻沉积物的规律,IDE-P含量高于NH₄Cl-P含量;不同沉积物的(NH₄Cl-P/IDE-P)%变化较大;IDE-P和NH₄Cl-P与STP、DPS、总磷和有机质的相关性较好。

关键词: 浅水湖泊, IDE法, H-L法, 可交换性磷, 潜在可交换性磷

Abstract: Exchangeable phosphorus can be estimated by an infinite dilution extrapolation approach (IDE) and the first procedure of Hieltjes and Lijklema approach in the superficial sediments of shallow lakes in the middle and lower reaches of the Yangtze River. Variation range and average amount of the NH₄Cl-P which can be determined by H-J approach and the IDE-P determined by IDE approach are studied for sediments with different pollution conditions. In addition, the quantity of the two forms of exchangeable phosphorus existing in those sediments is compared. The correlation between NH₄Cl-P and IDE-P and the proportion of NH₄Cl-P to IDE-P are analyzed. Recently, many researchers have focused their work on the effect of soil adsorption characteristics on soluble reactive phosphorus in solution. Some of the soil adsorption characteristics are estimated by soil test phosphorus (STP) and the degree of phosphorus saturation (DPS). In order to discuss the relationship between the two adsorption characteristics and the two speciations of exchangeable phosphorus, their linear correlations are discussed. The results are displayed as follows: (1)The potential exchangeable phosphorus determined by IDE approach and the exchangeable phosphorus quantified by the first step of H-J approach indicate that the contents of both are higher in the sediments which are seriously polluted and lower in those of slightly polluted. (2)The contents of IDE-P are higher than that of NH₄Cl-P in all kinds of sediments. The proportion of NH₄Cl-P to IDE-P verified greatly in different kinds of sediments. Because IDE-P is higher exactly in characterizing exchangeable phosphorus and more complex in procedure compared to the characteristics of NH₄Cl-P, proper approach can be chosen to make their results accord to the reality. (3)There are a good correlation between the two forms of exchangeable phosphorus and the soil adsorption characteristics of STP,DPS and other physio-chemical properties.

Key words: shallow lake in the middle and lower reaches of Yangtze River, IDE approach, H-L approach, exchangeable phosphorus, potential exchangeable phosphorus

步青云, 金相灿, 王圣瑞. 长江中下游浅水湖泊表层沉积物潜在可交换性磷研究[J]. 地理研究, 2007, 26(1): 117-124.

BU Qing-yun, JIN Xiang-can, WANG Sheng-rui. Study of the potential exchangeable phosphorus in sediments of shallow lakes in the middle and lower Yangtze River[J]. GEOGRAPHICAL RESEARCH, 2007, 26(1): 117-124.

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长江中下游浅水湖泊表层沉积物潜在可交换性磷研究

Study of the potential exchangeable phosphorus in sediments of shallow lakes in the middle and lower Yangtze River

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