运用逐步回归分析方法,进行因子筛选,找出与土壤肥力密切相关的因子。引用Fuzzy集合理论进行综合评判的数学模型,求出各立地型肥力得分。通过建立隶属函数,根据最大隶属原则,确定诸立地型肥力等级。为选择造林树种,制定经营措施,提供参考。土壤肥力高低与许多因子有关,因此在土壤肥力评价上,必须对多个相关因子作综合考虑,故对这个问题,可引用Fuzzy集合理论进行综合评判的数学模型。 Using stepwise regression analysis, factor screening was conducted to identify factors closely related to soil fertility. Reference to the fuzzy set theory to make a comprehensive evaluation of the mathematical model, find the fertility of each site score. Through the establishment of membership function, according to the principle of maximum membership, to determine the type of fertility rank. In order to choose afforestation tree species, make management measures and provide reference. Soil fertility is related to many factors, so in the evaluation of soil fertility, we must consider a number of relevant factors, so we can refer to the mathematical model of comprehensive evaluation of the fuzzy set theory for this problem.