| 两种夏威夷热带土壤的表面电荷特征 |
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| 引用本文： | 李学垣.两种夏威夷热带土壤的表面电荷特征[J].土壤学报,1985,22(2):120-126. |
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| 作者姓名： | 李学垣 |
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| 作者单位： | 华中农学院土壤农化系 |
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| 基金项目： | * 美国东西方文化技术交流中心资助 |
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| 摘 要： | 本文研究了典型三水铝矿腐殖质氧化土(Hadii Soil)和水化不饱和火山灰始成土(Maile Soil)的表面电荷特征。测出Maile粉砂壤土的比表面比Halii粉砂粘土的比表面将近要大一倍。Maile粉砂壤土的表面电荷零点(pH0)为5.90,Halii粉砂粘土的pH0为4.55;钙离子的吸附使土壤的pH0移至较低值,硫酸根离子的吸附使pH0移至较高值。Maile粉砂壤土的pH0>ZPNC(净电荷零点),Halii粉砂粘土的pH0<ZPNC。根据Uehara和Gillman12]表面电荷模式,Halii粉砂粘土带永久净正电荷,Maile粉砂壤土带永久净负电荷。
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CHARGE CHARACTERISTICS OF A TYPIC GIBBSIHUMOX AND A HYDRIC DYSTRANDEPT |
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| Li Xueyuan.CHARGE CHARACTERISTICS OF A TYPIC GIBBSIHUMOX AND A HYDRIC DYSTRANDEPT[J].Acta Pedologica Sinica,1985,22(2):120-126. |
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| Authors: | Li Xueyuan |
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| Institution: | Department of Soil Science, Huazhong Agricultural College |
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| Abstract: | Charge characteristics of a typic Gibbsihumoa (Halii soil) and a hydric Dystrandept (Maile soil)were investigated. The specific surface of Maile soil is about two times greater than that of Halii soil. The pH0 of Maile soil equal to 5.90 and pH0 of Halii soil equal to 4.55 specifically, adsorbed calcium ions shift the pH0 to lower values and specifically adsorbed sulfate anions shift bhe pH0 to higher values, when CaCl2 or Na2SO4 and CaSO4 are used as the supporting electrolytes. It was found that a positive permanent charge existed for the Halii soil and a negative permanent charge existed for the Maile soil by using the surface charge model developed by Uehara and Gillmsn. |
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