杨树人工林林木个体大小比数与溃疡病发生程度的关系  

Relationships between Neighborhood Comparison of Short-Rotation Poplar Plantations and Canker Disease Incidence

作　　者：王静[1] 梁军[1] 焦一杰[1] 张星耀[1] 

机构地区：[1]国家林业局森林保护学重点实验室中国林业科学研究院森林生态环境与保护研究所,北京100091

出　　处：《林业科学》2012年第11期57-62,共6页Scientia Silvae Sinicae

基　　金：国家"十二五"科技支撑项目"商品林重大病虫害监测预警与防控技术研究示范"(2012BAD19B08)

摘　　要：采用胸径、树高和冠幅计测大小比数分析林分空间结构与杨树人工林溃疡病发生程度的关系。结果表明:欧美杨107、108和DN113在同密度下,溃疡病发病程度与胸径、树高和冠幅的大小比数均呈极显著负相关,且在不同指标个体优势度间存在极显著差异。针对同一品种不同密度下进行比较分析,在株行距为3m×2m的林地中,欧美杨107溃疡病发病程度与上述指标大小比数的相关性显著,且均呈显著性负相关,但随着密度的减小,其相关性越来越弱,当株行距达到3m×4m时,杨树溃疡病病害的发生基本不受林木个体优势度强弱的影响。Since the occurrence of tree diseases has great correlation with the stand spatial structure,for poplar plantation composed with single tree species,to optimize the spatial structure,improve tree＇s potential growth,increase resistance of disease is the efficient way of prevention and treatment of poplar canker.In this paper,the correlation between canker occurrence of poplar plantation and neighborhood comparison of diameter at breast height,tree height and the size of tree crown was analyzed.The result shows that poplar 107,108 and DN113 in the same density,the occurrence of canker has significant negative correlation with neighborhood comparison of diameter at breast height,tree height and the size of tree crown.Comparative analysis of the same species with different densities was conducted in poplar plantation with planting space of 3 m×2 m,the disease severity index of poplar 107 has great negative correlation with neighborhood comparison of those indicators as well.And the correlation decreased with the declining of the density.When the planting space reaches to 3m×4m,the occurrence of canker would not be impact by individual dominance.

关 键 词：杨树人工林 溃疡病 树干感病面积比 大小比数 空间结构 

分 类 号：S763.1[农业科学—森林保护学]