马尾松林天敌昆虫群落对马尾松毛虫控制作用的研究  

Evaluating the impact of insect community on pine caterpillar density in different stand conditions

作　　者：李天生[1,2,3,4] 周国法[1,2,3,4] 汪国华 干中南 华正媛 

机构地区：[1]中国林业科学院森林保护研究所 [2]北京大学分校数学系 [3]浙江省龙游县森林病虫防治站 [4]浙江省衢州市森林病虫防治站

出　　处：《生物多样性》1998年第3期161-166,共6页Biodiversity Science

基　　金："八.五"国家科技攻关项目

摘　　要：本文通过对马尾松林松毛虫天敌昆虫群落优势种的选择及功能表述、用典型相关分析选择关键林分因子进行林地分类，研究了表示天敌昆虫群落对松毛虫控制作用的途径。结果表明，用天敌昆虫群落功能指标选择的重要林分因子为郁闭度、灌木层高度及盖度、草木层高度及总盖度。用这些林分因子可以把常灾区林地划分为４种类型，且这４类林地在天敌昆虫群落多样性、种数、个体数及松毛虫密度上都存在明显差异。最后分别建立了４类林地松毛虫密度变化率与多样性等功能指标及郁闭度等林分因子间的回归模型，回归相关性进一步表明用林分因子代替天敌昆虫的作用是合适的，这样代替的结果克服了生产应用时数据调查的困难，增加了实用性。This paper attempts to use some forest stand factors to substitute the effect of natural enemies. Through the studies from more than 200 stand plots with different stand conditions in Qu County, Changshan County and Longyou County of Zhejiang Province, 16 predominant species groups from insect community were selected, and the canonical correlation coefficient between the diversity index, species number, individual number of predominant species and the stand factors was analyzed. The results indicated that the canopy density and ground vegetation were the key stand factors for characterizing the function of insect community. The forest area was divided into four types according to the variation of canopy and vegetation conditions by using cluster analysis, there were significant differences in diversity index, species number, individual number of insect community and population density of pine caterpillar among four types of forests. The regression models between the rate of variation of pine caterpillar density and the forest factors including canopy density, vegetation coverages were developed in each type of forests, the results indicated that the classification of the forest stands is reasonable, and the stand factors can characterize the effect of natural enemies in practice. 

关 键 词：天敌昆虫 昆虫群落 松毛虫 多样性 林分因子 

分 类 号：S763.851[农业科学—森林保护学] S763.421[农业科学—林学]