Effects of frost action on soil physical properties of plough pan

作     者：Ximin Deng Jian Wang Wenshan Zhu Duansheng Chen Liping Liu 

作者机构：Chinese Agr Univ Dept Hort Beijing 100094 Peoples R China Chinese Agr Univ Dept Soil & Water Sci Beijing 100094 Peoples R China Chinese Agr Univ Dept Agron Beijing 100094 Peoples R China Chinese Agr Univ Dept Construct Beijing 100094 Peoples R China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：1999年第44卷第5期

页      面：445-448页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：Ministry of Agriculture  China  (97202-09) 

主　　题：plough pan soil physical properties frost action. 

摘      要：Undisturb ed soil cores of loamy clay plough pan were subjected to the treatments of freezing and thawing in laboratory. The effects of frost action on its bulk density, porosity, and hydraulic conductivity were investigated. The results indicate that freezing and thawing significantly reduced the bulk density of plough pan and increased its porosity and hydraulic conductivity. The reduction in the bulk density was closely related to the average daily soil minimum temperature and soil water content.