摘要
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。
The relationship between the colloidal surface properties and association of clay mineral, especially 14×10^(-10)m mineral and clay oxides in 26 horizons of 9 profiles of the yellow brown soil. red earth and latosol derived from granite type parent material was studied. Results indicated that: 1) The cation exchange capacity, total surface area and the proportion of internal, surface area decline of 2:1 type clay minerals, 14×10^(-10)m mineral and the increase of 1:1 type clay minerals and clay oxides. This is also in correspondence with 14×10^(-10)m mineral being vermiculite in yellow brown soil and 14×10^(-10)m mineral being 14×10^(-10)m intergrade mineral in red soil. 2) For two soils with a similar content and type to other clay minerals; as the 14×10^(-10)m mineral is vermiculite, the cation exchange capacity, total, surface area and the proportion of internal surface area of soil clay is higher, but the active acidity of soil is weaker, the content of exchangeable Al is lower, whereas the 14×10^(-10)m mineral is 14×10^(-10)m intergrade mineral, the situation of these properties is quite oppositive.These results imply that it is significant to differentiate 14×10^(-10)m intergrade mineralfrom 14×10^(-10)m mineral for the rational exploilation utilization, fertilization, amelioration and classification of acid soil in this region.
出处
《土壤学报》
CAS
CSCD
北大核心
1991年第2期146-154,共9页
Acta Pedologica Sinica
基金
国家自然科学基金
