青铜峡新疆杨林分个体树冠结构与溃疡病发生的关系  

Relationship Between Canker Outbreak and Individual Crown Structure of Populus bolleana Forest in Qingtongxia

作　　者：樊军锋[1] 黄逢龙[1,2,3] 焦一杰[2] 梁军[2] 

机构地区：[1]西北农林科技大学,杨凌712100 [2]中国林业科学研究院森林生态环境与保护研究所,北京100091 [3]吉安市林业科学研究所,吉安343011

出　　处：《林业科学》2010年第6期171-175,共5页Scientia Silvae Sinicae

基　　金：国家"十一五"科技支撑计划课题(2006BAD08A11)

摘　　要：杨树（Populus）作为能源、造纸和板材的原材料和生物量来源,在中国的栽植面积迅速增加（Fangetal,2007）,但其病虫害严重。杨树溃疡病（Botryosphaeria dothidea）在我国东北、华北、西北地区普遍流行,危害严重（刘会香等,2005;张星耀等,2003）。国内外对该病害的研究已有不少报道,但大都是抗病测定、抗病筛选、抗病育种、抗病机理、病菌分类等方面（张星耀等,2003）。生态控制将是未来森林有害生物控制的主要研究方向（梁军等，2004；2005；曾祥谓等，2005）。Ten crown structure indexes were measured and investigating poplar canker disease state was investigated on all the individuals in a poplar plantation. Based on the collected data relationships of crown structure with the disease state of the poplar individuals was analyzed. The results showed that height under branch （ Hub）,crown width （ W）,first - order branch angle （ Afb）,first - order branch diameter （ Dfb）,percentage of crown length with height（ CL /H）,crown shape ratio （CSR）,leaf area index （LAI）,total leaf area （TLA） and crown surface area （CSA） of non - diseased plants were larger than diseased plants,while,canopy layer density （ CLD） of non - diseased plants was smaller than diseased plants. Poplar canker severity（CS） was very significantly negatively correlated with W,Hub,CL /H,CSR and CSA and very significantly positively correlated with CLD; The order of the direct effect on CS was CLD〉 Afb 〉W 〉CSR 〉Dfb 〉CL /H〉 TLA 〉CSA 〉Hub〉 LAI. The direct effect of TLA,CSA,Hub,LAI on CS was negative,restrained poplar canker from developing ,and the direct inhibition of LAI was the largest. Lastly,the integrated effect of Dfb,CL /H,Afb,CSR, W,LAI on CS was negative. In these six crown structure indexes,LAI,having the largest negative decisive effect,can be regarded as primary limiting factor,and the second was W.

关 键 词：杨树 树冠结构 杨树溃疡病 病情 

分 类 号：S763.1[农业科学—森林保护学]