土壤粘粒吸附脲酶特征的研究  

Study on characters of clay granule aborbing urease

作　　者：冯贵颖[1] 朱铭莪[2] 陈会明[1] 

机构地区：[1]西北农林科技大学生命科学学院 [2]西北农林科技大学资源环境学院,陕西杨陵712100

出　　处：《西北农林科技大学学报（自然科学版）》2001年第5期84-87,共4页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家自然科学基金资助项目 ( 39370 14 8)

摘　　要：研究了 8种土壤粘粒对脲酶的吸附情况 ,结果显示 ,土壤粘粒对脲酶吸附 12 0 min可达平衡。土壤粘粒对脲酶的吸附等温线为 L型 ,可用双表面 L angm uir方程较好描述。初步认为土壤粘粒对脲酶吸附为化学吸附和物理吸附 。The characters of 8 kinds of clay granule absorbing urease are studied in this paper.It shows:the absorption of clay granule to urease gets to a balance after 120mins and the absorption isotherm takes on 'L' type.This can be well described by two surface Langmoir equation.The primary result is:the absorption of clay granule to urease can be divided into two types:chemical absorption and physical absorption,and the former is superior to the latter.

关 键 词：土壤粘粒 脲酶 吸附速率 吸附等温线 

分 类 号：S154.2[农业科学—土壤学]