兴安落叶松鞘蛾幼虫空间分布型的研究  

Research on spatial distribution of Coleophora dahurica larva

作　　者：封万里 贾春生[2] 

机构地区：[1]白山市林业局,吉林白山134300 [2]韶关学院英东生物工程学院,广东韶关512005

出　　处：《吉林林业科技》2010年第6期37-39,共3页Journal of Jilin Forestry Science and Technology

摘　　要：采用扩散型指数Iδ、聚集度指标I和CA、平均拥挤度与平均密度的比值(X*/)、Taylor的b指数、Iwao的X*—回归检验和聚集均数λ检验,探讨了兴安落叶松鞘蛾幼虫在落叶松纯林中的空间分布型。结果表明:兴安落叶松鞘蛾幼虫在林间树冠不同方位都呈聚集分布。造成聚集分布的原因是该虫本身的生活习性。Based on the diffusion Index Is, aggregation index I and CA, ration of average crowding degree to average density （X^＊/X^-）, Taylor＇ s b index, Iwao＇ s X^＊-X^-regression test and aggregation average λ test, the spatial distribution of Coleophora dahurica larva was determined in Larix pure trees. The results showed that the larva was aggregation distribution in different directions under canopy. The living behaviour of larva was the main reason for their aggregation distribution.

关 键 词：兴安落叶松鞘蛾 落叶松 空间分布型 

分 类 号：S763.3[农业科学—森林保护学]