山西省同朔地区青杨天牛为害程度的植被影响因素分析

Analysis of Corresponding Vegetation Factors to Harm Degree of Soperda Populnea L in Tong-Shuo Area,Shanxi

在山西省同朔地区选取4种不同杨树人工混交林,运用多样性指数、相关系数、相似系数、回归分析建立模型等方法,分析和总结青杨天牛为害程度与其相应的植被影响因素之间的规律。结果表明:随着乔灌草多样性指数增加,青杨天牛的为害程度下降;乔灌木的多样性变化对青杨天牛的为害程度的影响大于草本植物变化带来的影响。

Using biodiversity index, correlation matrix, similarity index and regression analysis model, in four kinds of artificial mixed poplar trees forests in Tong - Shuo area Shanxi, the rule between Soperda Populnea L harm degree and its corresponding vegetation factors were analysized. The result indicated that when the biodiversity index of Arbor - Shrub - Plant increases ,the Soperda Populnea L harm degree drops;the influence of Arbor- Shrub biodiversity index variation to the Soperda Populnea L＇ s harm degree is bigger than the herb variation.