摘要
在确定柳杉毛虫空间分布型的基础上，采用Iwao回归序贯分析方法，对柳杉毛虫幼虫的序贯抽样作了分析研究。得出了不同允许误差下的最适抽样数量。对柳杉毛虫的双重抽样进行了研究，得出以底部2根枝条平均虫口数量通过预测式y＝9．7544×1．1574来预测全株虫口数量。
According to the space distribution type of Dendrlimus latipennis, the sequential sampling of Dendrolimus latipennis was studied by application of Iwao regressive sequential analysis, the optimum sampling number on the different allowable error Condition was acquired an equation to predict the larva number on the whole tree was given by its dual sampling.
出处
《浙江林业科技》
北大核心
1999年第1期26-30,共5页
Journal of Zhejiang Forestry Science and Technology
关键词
柳杉毛虫
序贯抽样
空间分布型
柳杉
Dendrolimus latipennis
sequential sampling
type of space distribution
