摘要
本文研究了广东山地土壤的粘粒矿物组成、粘粒阳离子交换量和游离氧化铁等化学性质。结果表明,随着海拔的逐渐升高,高岭石含量渐减,2:1型矿物渐增;而三水铝石和1.4nm矿物含量以山体中部为最高。粘粒阳离子交换量的高低与2:1型粘土矿物含量的多少相吻合。粘粒的游离氧化铁含量,每个山体均是山地黄壤高于山地红壤和山地赤红壤。
Based on the Soil Resources Survey in Guangdong Province, this paper presents the clay mineral Composition, the clay cation exchange capacity and the clay free iron oxide, etc., of 57 soil samples from 19 representative mountain soil profiles. It is found that the kaolinite content reduces and the 2:1 type mineral content increases gradually as the altitude goes up. The gibbsite and 1: 4nm intergradient mineral content are highist in the halfway up mountain.The clay cation exchange capacity is affected by 2:1 type Clay mineral content. The free iron oxide content in clay in every mountain is higher in the mountain yellow soil than that in the mountain latored soil and mountain red soil.
关键词
山地
土壤矿物
广东
Mountain soil,Clay mineral,Cation exchange capacity, Free iron Oxide
