中文摘要：

于2011年至2013年,调查黑龙江黑河地区110块标准地（22个小班）兴安落叶松林立地因子、林分因子,分析立地因子和林分因子及生物多样性指数对兴安落叶松鞘蛾平均虫口密度的影响。单因素方差分析与Tukey检验表明,立地因子坡位、坡向、坡度、海拔高度对兴安落叶松鞘蛾平均虫口密度有显著影响（P〈0.05）;林分因子郁闭度、林型对兴安落叶松鞘蛾平均虫口密度有显著影响（P〈0.05）,林龄对兴安落叶松鞘蛾平均虫口密度无显著影响（P〉0.05）;下坡位、中坡位、阴坡、斜坡立地条件下兴安落叶松鞘蛾平均虫口密度较低,郁闭度较大以及珍珠梅兴安落叶松林型的林分兴安落叶松鞘蛾平均虫口密度较小,海拔和林龄对兴安落叶松鞘蛾平均虫口密度的影响无明显规律性。主成分分析及多元回归结果表明,坡向和林型对兴安落叶松鞘蛾平均虫口密度呈正影响,而坡位、坡度、海拔、郁闭度、林龄、木本植物Simpson指数和Shannon–Wiener指数对兴安落叶松鞘蛾平均虫口密度呈负影响。

英文摘要：

In Heihe area of Heilongiiang, the site factors and the stands factors of 110 sample plots （22 sub-compartment） in Larix gmelinii Kuzenneva forest were investigated from 2011 to 2013, the biodiversity index were calculated to analysis the effects of these factors on the average population density of Coleophora obducta Meyrick （C. obducta Meyrick）. One-way Analysis of Variance （ANOVA） and Tukey tests showed that the average population density of C. obducta Meyrick was significantly influenced by site factors such as slope position, slope aspect, gradient of slope and site elevation （P〈0.05）. Canopy density and forest types showed significant influence on the average population of 6＂. obducta Meyrick （P〈0.05）. However, the age of stands showed no significant influence on the average population of C. obducta Meyrick （P〉0.05）. The average population density of C. obducta Meyrick in those stands situated at down segment of hillslope, middle segment of hillslope, shady slope, steep hill was comparatively low. Stands with larger canopy density or stands mixed mainly by Sorbaria sorbifolia （L.） A. Br. and Larix gmelinii （Rupr.） Kuzen. have a low average population density of C. obducta Meyrick as well. Site elevation and age of stands both showed no regular influence on the average population density of C. obducta Meyrick. The results of principal component analysis and multiple regression indicated that slope aspect and forest type demonstrated a positive impact on the average population density of C. obducta Meyrick, but slope position, gradient of slope, site elevation, canopy density, age of forest, Simpson index and Shannon-Wiener index of woody plant demonstrated a negative impact.