总水势在SPAC系统水分运移定量计算中的应用分析  

Application of Total Water Potential to Quantify Water Transfer in SPAC System

作　　者：景卫华[1] 罗纨[1] 贾忠华[2] 

机构地区：[1]西安理工大学水资源研究所,陕西西安710048 [2]西安理工大学环境科学研究所,陕西西安710048

出　　处：《西安理工大学学报》2008年第1期52-57,共6页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(50209015);西安理工大学科技创新基金资助项目

摘　　要：依据物理学基本原理,分析了以能量观点为基础的总水势,得出其包括机械能和热能两种能量形式,这两种能量形式分别是水分机械运动和热运动的驱动力。据此将SPAC系统水分运移各个环节按照物理学原理进行了分解和归类,并根据各物理过程发生的规律确定了每个环节水分运移的驱动力本质,为总水势应用于SPAC系统水分运移定量计算理清了思路。In light of the fundamental principle in physics, this paper analyzes the total water potential concept built on energy viewpoint, and concludes that total water potential contains two energy forms, mechanical energy and thermal energy, which are the driving forces for water transfer and thermal dynamic processes. Thenceforth, we studied the physical processes of water transfer links in SPAC and determines that each link in different processes follows its own physical mechanism. The nature of each driving force is determined according to the rule of physical process. The analysis of this paper has clarified the ideas for quantitative calculation of water transfer in the Soil-Plant-Atmosphere Continum.

关 键 词：总水势 水分运移物理过程 驱动力 能量形式 

分 类 号：S152.72[农业科学—土壤学]