中文摘要：

土壤湿度是气候、土壤和植被之间动态相关的指示因子,土壤水分动态目前已经成为国内外生态学和水文学领域的研究热点之一。通过对典型土壤湿度动态变化模型的研究,论述了各模型的结构和随机化过程。结果表明,土壤湿度动态变化模型存在模型结构简化、模型参数经验化、随机过程理论化等问题。预估未来土壤湿度动态变化研究的方向为：在模型结构不断完善、模型参数不断得到优化的基础上,寻找与实际结合更紧密的土壤湿度随机变化理论。

英文摘要：

Soil moisture is the indicator of dynamic relationship among climate,soil and vegetation,soil moisture dynamics has become one of the hot researches in ecology and hydrology.By studying the typical model of soil moisture dynamics,this paper discusses the structure and random process of each model.The results show that most models have a simplified model structure,the model parameters are used in experience,and the theory of stochastic process is not agreeable to actual conditions.This paper estimates the future research direction of soil moisture dynamics,it is continuing to complete the model structure and optimize the model parameters.