晋西水土流失区地处黄土高原东部 ,水土流失极为严重 ,生态环境十分恶劣。本区多年来存在的造林成活率低、保存率低、林木生长量低等问题一直未能得到很好的解决 ,亟待依据适树适地的原则选择一些当家乔木树种来营造高标准、高效益的水土保持林。在对区内不同地貌类型区中不同立地条件上人工栽培乔木树种实地调查量测的基础上 ,通过建立主要适生乔木树种的Verhaulst生长模型 ,应用模糊最优局势决策法进行不同立地条件下的适生乔木树种排序 ,从而选出适生树种。调查结果表明 ,本区适生乔木树种较为贫乏 ,急需挖掘新的宜林乔木树种并应用一些造林新技术进行植被建设 The soil erosion area in western Shanxi is located in the east of the Loess Plateau with extremely serious soil erosion and poor ecological environment. The problems of low afforestation survival rate, low preservation rate and low tree growth have not been solved well for many years in this area. Some arborescent tree species should be selected according to the principle of suitable tree so as to create a high standard and high benefit Soil and Water Conservation Forest. Based on the field investigation of cultivated arbor species on different site conditions in different landform types in the area, the Verhaulst growth model of the main suitable tree species was established. Based on the fuzzy optimal situation decision-making method, Adaptive tree species sorting, thus selecting suitable tree species. The survey results show that the suitable tree species in this area is relatively poor, and it is urgent to excavate the new tree species of Yilin and apply some new afforestation techniques for vegetation construction