紫色水稻土对硅酸盐的吸附解吸与释放动力学研究  

KINETICS OF SILICATE ADSORPTION DESORPTION AND RELEASE IN PURPLE PADDY SOILS

作　　者：高明[1] 魏朝富[1] 谢德体[1] 陈世正[1] 

机构地区：[1]西南农业大学资源环境学院

出　　处：《西南农业大学学报（自然科学版）》1999年第2期174-179,共6页Journal of Southwest Agricultural University

基　　金：重庆市中青年科技专家基金

摘　　要：】对四川几种主要紫色水稻土的硅酸盐吸附、解吸与释放动力学研究表明，紫色水稻土吸硅能力较强，吸附、解吸分快反应和慢反应两步进行，２４ｈ内的吸附、解吸量占吸附、解吸总量的５０％以上。有机酸比水显著地促进土壤硅的释放，增加土壤有效硅的含量。吸附、解吸动力学过程能很好地拟合Ｌａｎｇｍｕｉｒ型方程。A preliminary study was carried out of the kinetics of silicate adsorption-desorption and release in three major purple paddy soils collected from Sichuan province. All the soils showed a strong ability to adsorb silicon. The whole process of adsorption-desorption was divided into two stages: a fast reaction followed by a slow reaction. The adsorbing-desorbing capacity in the first 24 hours accounted for more than 50% of the entire process of adsorption-desorption. Compared with water, organic acids significantly promoted the release of silicon in the soil. The kinetics of silicate adsorption and desorption in the soils could well be described with a longmuir-type equation.

关 键 词：紫色水稻土 硅酸盐 吸附 解吸附 释放动力学 硅肥 

分 类 号：S155.292[农业科学—土壤学] S153[农业科学—农业基础科学]