波纹杂毛虫幼虫空间分布型及其抽样技术的初步研究  

Preliminary Study on the Spatial Distribution Pattern of Cyclophragma undans Larvae and on Its Sampling Technique

作　　者：洪宜聪 杨希[2] 张庆美 王丽艳 洪丽娟 

机构地区：[1]福建省沙县林业局,福建沙县365500 [2]福建省林业科学研究院,福建福州350012

出　　处：《福建林业科技》2001年第3期42-46,共5页Journal of Fujian Forestry Science and Technology

摘　　要：用聚集度指标法、Iwao的回归法对波纹杂毛虫幼虫在马尾松林内的空间分布型进行研究 ,结果表明幼虫在马尾松林内为聚集分布。并用Iwao法确定平均拥挤度 (m )与平均密度 (x)的回归方程 ,分析并计算了林间调查的最佳抽样数 ,列出序贯抽样表。林间抽样方法比较认为 ,对角线取样法精度较高 。The aggregation index method and the Iwao regression method have been adopted to study the spatial distribution pattern of Cyclophragma undans in the forest of Pinus massoniana.The results reveal that the larvae assume the aggregation distribution.The Iwao method is also used to determine the regression equation between average crowding degree and average density;analyze and calculate the optimal sampling quantity for forest survey;and list the sequential sampling table,The precision of the diagonally sampling method is higher and is suitable for the pest situation survey in the forest.

关 键 词：波纹杂毛虫 空间分布型 抽样技术 马尾松害虫 

分 类 号：S763.42[农业科学—森林保护学]