摘要
为探讨汪清林区天然林中食叶害虫危害与林分特征的关系,在林区选取了针叶林、针阔混交林以及阔叶混交林3种类型林分共36块临时样地,比较了不同类型林分的食叶害虫为害率,分析了食叶害虫危害与立地条件、林分特征的关系。结果表明:不同林分间的食叶害虫为害率存在显著的差异,多重比较显示,食叶害虫为害率在林分间差异非常明显,即阔叶混交林>针阔混交林>针叶林;食叶害虫为害率与针叶树比例呈极显著的负相关,与林木Simpson指数呈极显著的正相关,与林木Shannon-Wiener指数呈极显著的正相关,同时食叶害虫为害率与林分郁闭度的关系显著。汪清林区天然林中食叶害虫危害格局符合"联合易感性"假说。
In order to investigate the relationship between damage rate of defoliator and forest characteristics in Wangqing natural forest, using measurements from 36 temporary sample plots in 3 different forest type （coniferous forest, conifer and broadleaved mixed forest and broadleaved mixed forest ） , we compared damage rate of defoliator in different forest types and analyzed the relationship between damage rate of defoliator and forest characteristics, site condition. It was found that there was significant difference of damage rate of defoliator in different forest types. Multiple comparison showed that damage rate of defoliatorin broadleaved mixed forest 〉 that of conifer and broadleaved mixed forest 〉 that of coniferous for- est. Damage rate of defoliator was extremely significant negative correlated with the coniferous trees proportion, and ex- tremely significant correlated with Simpson and Shannon-Wiener indexes, meanwhile significantly correlated with crown density. The damage pattern of defoliator in Wangqing natural forest was consistent with the ＂associational susceptibility＂ hypothesis apparently.
出处
《林业科技开发》
北大核心
2014年第1期55-58,共4页
China Forestry Science and Technology
基金
林业公益性行业科研专项(编号:20100400201-01)
关键词
天然林
食叶害虫
林分特征
多样性指数
联合易感性
Natural forest
defoliator
forest characteristics
biodiversity index
combined Susceptibility
