西北林学院学报2024，Vol.39Issue(1)：95-99,116,6.DOI:10.3969/j.issn.1001-7461.2024.01.13
大兴安岭落叶松毛虫不同危害程度虫害木结构特征
Structure Characteristics of Dendrolimus superans Damaged Trees With Different Damage Degrees in Daxing'an Mountain
摘要
Abstract
Taking the Larix gmelinii stands damaged by Dendrolimus superans as the research object,the spatial structure characteristics of the damaged trees with different damage degrees were analyzed by uni-variate and bivariate distribution analysis method.The results showed that the uniform angle index(UAI)of extremely lightly-damaged trees was 0.470,and the distribution pattern was uniform.The UAI of slightly-damaged trees was 0.495,and the distribution pattern was random.The UAI of moderately-dam-aged trees was 0.544,and the distribution pattern was aggregation distribution.The higher damage degree of the stand,the higher uniform angle index.The neighborhood comparison of extremely lightly-damaged,slightly-damaged and moderately-damaged was 0.483,0.495 and 0.539,indicating the higher degree of the stand,the higher neighbourhood comparison.Among the four adjacent trees with extremely lightly-dam-aged,slightly-damaged and moderately-damaged trees,the proportions of damaged trees was 57.2％,82.1％and 91.1％.The greater the degree of damage,the more cases of continuous distribution of dam-aged trees.The bivariate distribution characteristics of the uniform angle index and neighbourhood compar-ison of the trees with different damage degrees were different from those of damaged tree ratio and neigh-bourhood comparison,but the difference of bivariate distribution characteristics of the damage tree radio and uniform angle index were not obviously.In forest management activities,we can adjust the spatial structure of the stand,reduce the stand uniform angle index and the neighbourhood comparison to improve the growth status of trees,so as to achieve the purpose of controlling the outbreak of pests.关键词
落叶松毛虫/空间结构/虫害木Key words
Dendrolimus superans/spatial structure/pest damaged tree分类
农业科技引用本文复制引用
王千雪,王烁,韩大校,于宏影,崔嵘,黄艳,丛日征..大兴安岭落叶松毛虫不同危害程度虫害木结构特征[J].西北林学院学报,2024,39(1):95-99,116,6.基金项目
中央级公益性科研院所基本科研业务费专项(CAFYBB2020MA004). （CAFYBB2020MA004）
