土壤动力水文学问题的研究及其在防护林体系建设中的应用

A Study on the Theory of Dynamic Soil Hydrology andIts Application in the Establishment of Protective Forest System

文中论述了土壤动力水文学概念的形成与发展，对其主要问题的研究进展，如土壤人渗特性、土壤水分运动特征参数、根系吸水问题、蒸发散、水量平衡的研究进行了综合评述。并讨论了土壤动力水文学理论在防护林体系建设中的作用，应用这一理论分析了黄土地区防护林体系合理造林密度和小老树防治与改造等方面的问题。

Abstract This paper presents the conception of dynamic soil hydrology and its develop-ment. The research progress on its main aspects, such as soil permeability, root systemabsorption,evaporation and water balance are summarized. The role of dynamic soil hy-drology theory in the establishment of protective forest system is discussed. The optimaldensity of protective forest system in loess plateau, and the improvement of lowpoletrees of poor growth are studied.