柳杉毛虫卵空间分布型及抽样技术研究  

Spatial Distribution Patterns and Sampling Technique of Dendrolimus houi Eggs

作　　者：刘汝明 巫伟 严德卿 

机构地区：[1]浙江省衢州市柯城区森林病虫防治站,浙江衢州324000 [2]浙江省衢州市柯城区九华乡林业站,浙江衢州324028

出　　处：《浙江林业科技》2008年第6期32-34,共3页Journal of Zhejiang Forestry Science and Technology

摘　　要：对衢州市柯城区柳杉毛虫卵进行了调查分析,结果表明:该虫卵个体间相互吸引,种群空间分布格局为聚集型,基本成份为个体群,具有一个公共Kc=1.4173的负二项分布。聚集原因是由于昆虫本身的聚集行为所致,或是由于环境异质性和昆虫本身的聚集行为两因素作用结果。有卵枝率(Z)与平均虫口密度(X)关系为:X=0.001698Z2.020298,卵集中分布在树冠的下部,其次为中部、上部;理论抽样数为:N=1/D2(5.12610/X+0.38137)。Investigation on Dendrolimus houi eggs in Kecheng, Quzhou, Zhejiang province demonstrated that the eggs were interattracted, and basic unit of spatial distribution were colonies, and special distribution of basis unit was aggregation, with a common negative binomial distribution of Kt = 1.417 3. The reason of aggregation is the behavior of insect, or effect of environmental heterogeneity and insect behavior. The relationship of the ratio of branch bearing eggs （z） and average insect density was： X = 0.001698Z^2.020238 . Eggs distributed mostly at lower part of crown, then the middle and upper part. Theoretical sampling number was： N = I/D2（5.12610/X＋ 0.38137）.

关 键 词：柳杉毛虫 卵 空间分布 抽样 

分 类 号：S763.42[农业科学—森林保护学]