土壤斥水性与有机质质量分数的变化关系研究  

The Relationship between WDPT and Soil Organic Matter

作　　者：陈俊英[1,2,3] 吴普特[2] 张智韬[2] Gideon Oron 汪志农[2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [2]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [3]中国科学院/水利部水土保持研究所,陕西杨凌,712100 [4]本古里安大学Blaustein沙漠研究所,以色列思德博克84990

出　　处：《灌溉排水学报》2012年第3期96-98,118,共4页Journal of Irrigation and Drainage

基　　金：武汉大学水资源与水电工程科学国家重点实验室开放基金项目(2010B070);中国博士后科学基金项目(20110491700);西北农林科技大学人才专项资金资助项目(2009)

摘　　要：土壤有机质质量分数是影响土壤斥水性的最主要因素之一,为研究二者之间的关系,选用以色列3类不同质地斥水性土壤为对象,分别在田间和实验室测定土壤斥水性和有机质质量分数,并绘制土壤斥水性和有机质质量分数的等值线图和关系图。结果表明,对于粘性土壤和沙质土壤,土壤斥水性随有机质质量分数成幂指数关系,但对于壤土,二者之间没有非常明显的线性关系。研究结果可为分析不同土壤的斥水性影响因素和土壤改良提供理论依据。Soil organic matter is the main factor of soul water repellency.This paper got the contour of Water Drop Penetration Time（WDPT） for three kinds of soils namely clay,loam and sandy soil,by measured WDPT in the field and soil moisture and organic matter in the lab.Meanwhile the relationship between WDPT and soil organic matter was got by measuring WDPT after drying soil samples 65 ℃ for clay and sandy soil in the lab.The results show that the relationship between WDPT and organic matter shows difference between soils.It is a power correlation for clay and sand and no linear correlation for loam.It can provide the theory for the factors of soil water repellency and soil amelioration.

关 键 词：土壤斥水性 有机质质量分数 变化关系 土壤含水率 

分 类 号：S152.7[农业科学—土壤学]