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地理科学  2001 

土壤水溶性有机物吸着系数及其影响因素研究

, PP. 423-427

Keywords: 土壤,水溶性有机物,吸着系数,地域分异,分子量分布

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Abstract:

测定了中国中、东部地区17种土类45个表土样品中水溶性有机物的吸着系数、分子量分布、腐殖酸含量、粘土含量以及土壤pH值,分析了水溶性有机物吸着系数的分布、地域分异和影响吸着系数的主要因素。结果表明,中国中、东部主要天然土壤类型A层水溶性有机物吸着系数在0.0014~0.0284L/g,中位数为0.0062L/g;研究区吸着系数具有自北向南和自西向东递降的一般趋势。水热的地域分异是影响土壤A层Ks地域分异的根本因素,pH和WSOC分子量分布是直接影响Ks值的两个重要因素。

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