1 引言最适样方大小的确定系属种群密度估计方法中抽样策略的研究内容之一,亦系昆虫种群简单随机抽样技术中与最适抽样方法、最适理论抽样数的确定具有同等重要程度的3个基本问题之一。对此,国内外学者先后提出过一些方法,笔者亦曾基于改进的Iwao m-m模型、再次改进的Iwao m-m模型以及Southwood(1976)提出的确定理论抽样数公式,推 1 Introduction The determination of the optimal sample size is one of the research contents of the sampling strategy in the population density estimation method. It is also an important factor in determining the optimum sampling number for the simple random sampling technique of insect populations. One of the three basic questions. In this regard, domestic and foreign scholars have proposed some methods, the author has also based on the improved Iwao m-m model, improved Iwao m-m model and Southwood (1976) to determine the theoretical sampling formula, push