摘要
用6种聚集度指标对弧目大蚕蛾卵的空间分布状况进行调查与分析,结果表明:(1)该虫卵的空间分布符合负二项分布,其空间图式是聚集的,分布的基本成分是卵块的个体群;(2)最适抽样数N与平均卵密度m及允许误差D的关系为N=(1/D)2[(6.681 4/m)+0.975 8]。
Spatial distribution patterns of Neoris haraldi eggs were investigated and analyzed with 6 kinds of aggregation indexes. Result shows that: (1) the spatial distribution of Neoris haraldi eggs, whose spatial pattern is aggregative, conforms to negative binomial distribution; the basic component of larvae distribution is individual colony; (2) the correlation of the suitable sampling value (N) with average density of eggs (m) and allowable error (D) is N = (1/D) 2[ (6.681 4/m) +0.975 8].
出处
《防护林科技》
2009年第5期16-18,共3页
Protection Forest Science and Technology
基金
克拉玛依市科技局项目(SK2007-02)
关键词
弧目大蚕蛾
卵
空间分布
Neoris haraldi
egg
spatial distribution