西南红壤和黄壤粘粒的矿物特性

西南红、黄壤带内,水热条件十分优越,作物一年2—3熟,土壤生产潜力很大,是我国农林业的重要生产基地,本文从该区土壤发生分类、矿物组成、理化性质分析结果表明,西南红、黄壤发育的各种母质,以红粘土母质发育的土壤最深,可能为地带性土壤的代表,而发育于大勐龙原始林下的砖红壤尚因热量条件较低,矿物以高岭石为主,未见三水铝石区别于广东砖红壤以高岭[三水铝矿]为主。

PROPERTIES OF THE CLAY MINERALS OF THE RED EARTH AND YELLOW EARTH IN SOUTHWEST OF CHINA

The yellow earth and red earth in Southwest of China are important producing area for agriculture and forestry. The climate is superior and the producing potentiality of the soil is high. Crops can grow for 2 to 3 ripening.in a year. The paper discussed the compositions, the physical and chemical properties of the clay minerals and also the development and classificati0n of the soil in that ared. The soil generated from the red clay in the Southwest can be the typical zonal soil because of the formed deepest weathering. Compared with the Latosol in Guangdong, the Latosol in Da in Long original forest has weaker weathering because of the lower temperature. And the dominant clay minerals of it is Kaolinite and there is mo gibbsite in it.