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本文探讨了立地环境因素与蓝桉、直干桉人工林地下害虫种类、分布及危害程度的关系。用数量化（Ⅰ）方法的数学模型将各种立地环境定性因素转化为定量因素，进行了立地环境因素对桉树地下害虫发生危害程度影响的分析，判断出影响新造林地桉树地下害虫发生危害的主要因素是海拔高度、土壤类型与桉树树种也有一定的关系。而林分结构和坡向对地下害虫的发生危害影响作用较小。采用建立的预测模型来估测不同生态环境条件下的桉树新造林地下害虫的发生危害程度。
The paper discussed the relationship between site environmental factors and the types, distribution and damage degree of underground pests in Eucalyptus grandis and Eucalyptus grandis plantation. Using the mathematical model of quantitative (Ⅰ) method, the qualitative factors of various habitats were converted into quantitative factors, and the influence of site environmental factors on the damage degree of underground pests in Eucalyptus trees was analyzed. The main factor is the altitude, soil types and eucalyptus species also have a certain relationship. However, the stand structure and aspect have less effect on the occurrence and damage of underground pests. The established prediction model was used to estimate the degree of occurrence of underground pests of new eucalypt plantation under different ecological environment conditions.