生物多样性与林分抗虫性的评判  

The judgment of resistance forestry for pest by biodiversity index

作　　者：李孟楼[1] 王鸿哲[1] 张学武[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100

出　　处：《西北农林科技大学学报（自然科学版）》2004年第3期65-68,共4页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家教育部科学技术研究重点项目(03159);国家林业局黄土高原林木培育开放实验室基金项目(K02-10)

摘　　要：　针对用林分多样性指标难以对林分抗虫能力作出评价的问题,论述了应用多样性测度阈值和林分虫害强度确定混交林混交率,并根据特定林分的混交率判定其对特定害虫抗性强弱的原理,并阐述了应用多样性阈值评判林分抗虫性的可行性及其影响因素。Considering that it is difficut to judge the insect-resistant capacity of forest by the biodiversity index of forest,the paper discussed how to ascertain the mixed rate of forest by DTV (insect community diversity threshold value) and Sph (Strength of pest harm).Moreover,how to judge the resistance to insect pests of forest according to the mixed rate of forest is clearly explained.Meanwhile,the feasibility and influencing factor of applying DTV technique to judge resistance insect pest of forest are elaborated.

关 键 词：生物多样性 林分抗虫性 多样性测度阈值 混交林 混交率 评判原理 

分 类 号：S763.3[农业科学—森林保护学]