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一、意 义土壤与纯砂的基本区别,是能够保、蓄并向植物提供养分离子,土壤具有这种能力的根本原因,是土壤胶粒的表面带有电荷.所以,土壤的表面电荷是土壤肥力的基础.长期以来,土壤科学的发展是来自对温带土壤的研究.由于这些土壤的特点,在土壤学中长期存在的普遍概念是土壤所带的电荷数量是恒定的.但是近年来,随着对热带、亚热带土壤的研究的深入,开始认识到土壤的电荷数量随环境条件而变.电荷的这种可变性在热带、亚热带土壤(红壤)表现得特别明显,
First, the significance of the basic difference between soil and pure sand, is able to protect, storage and nutrition ions to the plant, the root causes of this ability of the soil is that the surface of soil particles with a charge, so the surface charge of the soil is soil Fertility. For a long time, the development of soil science came from the study of temperate soil. Due to the characteristics of these soils, the general concept of long-term existence in soil science is that the amount of charge in the soil is constant, but in recent years, In-depth study of tropical and subtropical soils has begun to recognize that the amount of charge in the soil varies with environmental conditions and this variability of charge is particularly evident in tropical and subtropical soils (red soils)