土壤生态能概念的构建及其在障碍土壤判断上的应用

Construction of Soil Ecological Energy Concept as a Criterion in Obstacle Soil

土壤生态能是指某一单元土壤体系中维持其土壤生态系统健康的能力,其概念的建立是为了全面研究土壤生态系统健康状态及其变化方向和限度而定义的热力学状态函数。土壤生态能包括土壤内能、土壤熵值、水分渗透压能、比表面张力能、离子化学势、土壤胶体吸附能等土壤体系的理化性质,其加和结果即为土壤生态能值。土壤生态能值的变化相当于土壤体系与外界环境所发生的输入与输出能值的大小,表达土壤生态系统健康发展的方向和限度,可作为障碍土壤调理与改良的判断依据。

Soil ecological energy refers to the ability to maintain the health of soil ecosystem in a unit of soil system. The concept of soil ecological energy is defined as a thermodynamic state function to study comprehensively the health state of soil ecosystem and its changing direction and limit. Soil ecological energy includes soil internal energy, soil entropy, water osmotic pressure energy, specific surface tension energy, ionic chemical potential, soil colloid adsorption energy and other physical and chemical properties of the soil system, and the accumulation result is a value of soil ecological energy. A change of the value of soil ecological energy is equal to the input and output energy between the soil system and the external environment, which indicates the direction and limit of the healthy development of the soil ecosystem, and serves as a criterion for the conditioning and improvement of the obstacle soil.