| 土壤表面电荷测定的两种方法之比较 |
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| 引用本文： | 刘永红,吴金明,董元彦,李学垣. 土壤表面电荷测定的两种方法之比较[J]. 土壤学报, 2003, 40(5): 745-749 |
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| 作者姓名： | 刘永红 吴金明 董元彦 李学垣 |
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| 作者单位： | 华中农业大学资源环境学院,武汉,430070 |
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| 基金项目： | 国家自然科学基金重点项目(No.49831005)资助 |
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| 摘 要： | 用返滴定法和Mehlich法研究测定了我国不同地带土壤 (砖红壤、红壤、黄棕壤、暗棕壤、黑土 )无机胶体的表面电荷。结果表明 :( 1 )两者的测定结果有较大的差异 ,其主要的原因是返滴定法和Mehlich法分别基于不同的衡量标准 ,从不同的侧面反映了土壤表面的电荷性质 ;( 2 )返滴定法与Mehlich法各有其优点 ,但在具体的测定过程中都有些环节可能需要改进。
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| 关 键 词： | 返滴定法 Mehlich法 表面电荷 土壤无机胶体 地带性土壤 |
| 收稿时间： | 2002-03-24 |
| 修稿时间： | 2002-03-24 |
COMPARISON OF TWO METHODS FOR DETERMINING SURFACE CHARGE OF INORGANIC SOIL COLLOIDS |
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| Liu Yong-hong,Wu Jin-ming,Dong Yuan-yan and Li Xue-yuan. COMPARISON OF TWO METHODS FOR DETERMINING SURFACE CHARGE OF INORGANIC SOIL COLLOIDS[J]. Acta Pedologica Sinica, 2003, 40(5): 745-749 |
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| Authors: | Liu Yong-hong Wu Jin-ming Dong Yuan-yan Li Xue-yuan |
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| Affiliation: | Huazhong Agricultural University, Wuhan 430070, China;Huazhong Agricultural University, Wuhan 430070, China;Huazhong Agricultural University, Wuhan 430070, China;Huazhong Agricultural University, Wuhan 430070, China |
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| Abstract: | Surface charge of inorganic colloids in soils(brick red soil, red soil, brown yellow soil, dark brown soil, black soil) distributed in different latitudes of China was studied with the back-titration method and Mehlich method. Results show that: (1)a big difference exists between the two methods, mainly because they are based on different measuring units, but anyway they reflect surface charge of inorganic colloids from different sides; and (2)either has its own advantages. When used for determination of surface charge of inorganic colloids, however, both of them have to be modified in terms of practical procedure in determination. |
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| Keywords: | Back-titration method Mehlich method Surface charge Inorganic soil colloids Soils distributed in different latitudes |
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