黄山中低海拔区域松林松墨天牛虫口数量分布与环境因子分析

Correspondence analysis of quantitative distribution of Monochamus alternatus and environmental factors at middle and low elevation area of Mount Huangshan

为了解黄山周边松林松墨天牛Monochamus alternatus相对虫口数量,探索松墨天牛相对虫口数与林分因子的关系,在黄山周围中低海拔区域选6片马尾松林设立29个收集点,采用APF-1型松墨天牛化学诱剂和ZM-60型诱捕器诱捕天牛,统计1个月内诱捕数量。以各收集点诱捕天牛数量同7个环境因子进行回归分析。回归分析表明,松墨天牛相对虫口数与林龄、林分郁闭度关系最为密切,与坡位、混交比关系也较密切,而与海拔高度、树高、坡向3个因子关系不很密切。诱捕结果还显示,黄山周围南大门和浮溪林区天牛密度较高。

In order to understand the quantitative distribution of sawyer beetles Monochamus alternatus in middle and low elevation pine forest around Mount Huangshan,and to understand the relationship between quantitative distribution of M.alternatus and stand factors,a total of 29 collection sites were set up in 6 Pinus massoniana stands around Mount Huangshan.Using APF-1 type beetle chemical attractant and ZM-60 type trap to trap M.alternatus,the quantity of trapping within a month was counted.The number of trapped M.alternatus and seven environmental factors were analyzed with multivariate regression equation.Regression equation analysis showed that quantitative distribution of M.alternatus had the closest relation with stand age and forest canopy density,and was also closely related to slope position and mixed ratio,but was not closely related to altitude,tree height and slope aspect.Meanwhile,there was a high density of M.alternatus in the south gate and Fuxi forest areas around Huangshan.