摘要
本文阐述了两级抽样在昆虫种群调查中的应用价值,探讨了简化抽样过程的方法,并推导出不同条件下的两级抽样理论抽样数公式。
In this paper, promise and simplified methods of two--stage samplingfor estimating insect population density are discussed, and several formulasof theoratical sample size for two-stage sampling on different conditionsare deduced.
关键词
昆虫
种群
调查
两级抽样法
Insect population
Two-stage sampling
