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本文研究了中南地区不同纬度带花岗岩母质发育的黄棕壤、红壤、砖红壤的胶体表面性质与粘土矿物组合、14×10~(-10)m矿物、氧化物的关系。结果表明:(1)黄棕壤、红壤、砖红壤粘粒的阳离子交换量、比表面和内表面占总表面的比例依次减小,这与其高岭石、粘粒氧化物含量依次增加,14×10~(-10)m矿物含量依次减少有关,且也与14×10~(-10)m矿物在黄棕壤中主要是蛭石,在红壤中主要是14×10~(-10)m过渡矿物,砖红壤不含14×10~(-10)m矿物的结论相符合。(2)在其他矿物类型和含量相近下,14×lO~(-10)m矿物是蛭石的土壤与14×10~(-10)m矿物是14×10~(-10)m过渡矿物的土壤相比,前者的阳离子交换量、比表面、内表面占总表面的比例比后者高些,但土壤的活性酸度弱些,交换性铝含量比后者低些。
In this paper, the relationship between colloidal surface properties and clay mineral assemblages, 14 × 10 ~ (-10) m minerals and oxides of yellow brown earth, red earth and latosol in different latitudes of central South China is studied. The results showed that: (1) The cation exchange capacity, the ratio of specific surface area and internal surface area to the total surface area of clay in yellow brown earth, red soil and red brick soil decreased in turn, which in turn increased with the content of kaolinite and clay oxide × 10 ~ (-10) m mineral content in turn decreased, and also with 14 × 10 ~ (-10) m minerals in yellow brown soil is mainly vermiculite, red soil mainly 14 × 10 ~ (-10) m transitional minerals, brick red soil does not contain 14 × 10 ~ (-10) m minerals consistent with the conclusion. (2) In other mineral types and contents, the 14 × 10 ~ (-10) m vermiculite soil and the 14 × 10 ~ (-10) m mineral are 14 × 10 ~ (-10) m transitional mineral , The ratio of cation exchange, specific surface area and total surface area of the former was higher than that of the latter. However, the active acidity of the soil was weaker and the content of exchangeable aluminum was lower than that of the latter.