思茅松林的树木多样性与主要害虫发生的关系  

Primary insect pest occurrence and tree diversity in stands of Pinus kesiya var. langbianensis

作　　者：闫争亮[1] 刘云彩[1] 胡光辉[1] 刘永刚[1] 孟梦[1] 

机构地区：[1]云南省林业科学院云南珍稀濒特森林植物保护和繁育重点实验室/云南省森林植物繁育和开发利用重点实验室,云南昆明650204

出　　处：《浙江农林大学学报》2012年第2期226-231,共6页Journal of Zhejiang A&F University

基　　金：国家林业局公益性行业科研专项(200704021)

摘　　要：对思茅松Pinus kesiya var.langbianensis人工林的不同混交配置模式的树木多样性及其与思茅松主要害虫的发生程度之间的关系进行了连续2 a的研究(2009年和2010年)。思茅松与红木荷Schima wallichii,西南桦Betulaalnoides或高阿丁枫Altingia chinensis的混交林以及栽松留阔思茅松人工林的多样性指数(Shannon指数)显著高于思茅松纯林,但林地的均匀度指数(Pielou指数)并不和多样性指数的变化一致。思茅松主要害虫思茅松毛虫Dendrolimuskikuchii,微红梢斑螟Dioryctria rubella,松实小卷蛾Retinia crstata的危害情况随林地树木多样性指数的增加而降低。在思茅区清水河乔林层中,思茅松毛虫[y=-29.929x+70.61,R2=0.966 7(2010年);y=-14.578x+34.213,R2=0.974 9(2009年)],微红梢斑螟[y=-8.873x+20.627,R2=0.994 6(2009年);y=-8.653x+20.215,R2=0.935 1(2010年)]的受害率与乔木层的Shannon指数呈现更好的线性关系,而松实小卷蛾的受害率则与灌木层的Shannon指数呈较好线性关系[y=-5.672 7x+14.964,R2=0.835 8(2009年);y=-4.476x+12.27,R2=0.838 1(2010年)。在景谷文朗,思茅松毛虫[y=-55.454x+135.16,R2=0.954 1(2009年)和微红梢斑螟[y=-23.895x+57.907,R2=0.983 1(2009年)]的受害率与乔木层的Shannon指数同样呈现较好的线性关系。In order to understand the impact of increasing woodland plant diversity on degrees of insect pest occurrence,plant diversities of different deposition models for Pinus kesiya var.langbianensis plantations and the occurrence degrees of the three primary pests：Dendrolimus kikuchii,Retinia cristata and Dioryctria rubella were investigated from 2009 to 2010 in Simao County and Jinggu County,Yunnan Province.Plant diversities in different plantations were denoted by Shannon index,and the species evenness were denoted by Pielou index.Insect occurrence degree were denoted by percentage of insect-infesting trees.Results showed that the Shannon index for mixed stands of P.kesiya var.langbianensis versus Schima wallichii,Betula alnoides,Altingia chinensis,or stands of pine mixed with hardwoods was higher than monoculture pine stands.However,tree stands of higher Shannon index dose not necessarily have a higher Pielou indices.The occurrence degrees of the three main insect pests decreased with the increased of Shannon indices.In Qingshuihe of Simao County,the occurrence degree of Dendrolimus kikuchii（y =-29.929x ＋ 70.61,R2 = 0.966 7;y =-14.57 8x ＋ 34.213,R2 = 0.974 9） and Dioryctria rubella（y =-8.872 7x ＋ 20.627,R2 = 0.994 6;y =-8.652 9x ＋ 20.215,R2 = 0.935 1） showed good linear relationship with the Shannon indices of tree layer,whereas that of Retinia crstata showed good linear relationship with the Shannon indices of shrub layer.（y =-5.672 7x ＋ 14.964,R2 = 0.835 8;y =-4.4756x ＋ 12.27,R2 = 0.838 1）.In Wenlang of Jinggu County,there were also good linear relationship between occurrence degree of Dendrolimus kikuchii（y =-55.454x ＋ 135.16,R2 = 0.954 1） or Dioryctria rubella（y =-23.895x ＋ 57.907,R2 = 0.983 1） with Shannon index of tree layer.Appropriately increasing tree species diversity in plantations can reduce the incidence of insect pests.

关 键 词：森林保护学 思茅松 树木多样性 害虫发生程度 

分 类 号：S763[农业科学—森林保护学]