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通过对秋季柑橘木虱不同发生密度果园调查取得的11组样本资料,应用聚集度指标法I、wao法和Taylor法等对其空间分布型进行测定检验,结果表明,柑橘木虱成虫在柑橘上呈聚集分布,其聚集度随着种群密度升高而增加。其聚集原因经Blackith种群聚集均数测定明确,当m<3.463 8时和m≥3.463 8时,有其不同的聚集原因。在此基础上,通过Iwao的M*-回归检验方程明确了最佳样方大小;通过几种抽样方式比较,以五点式和跳跃式为最佳,并提出了最佳理论抽样数和最佳序贯抽样模型。
According to the data of 11 groups of orchards collected from different density citrus psyllid survey in autumn, the spatial distribution patterns of 11 tested citrus psyllids were determined by the method of aggregation index I, wao method and Taylor method. Aggregation distribution, the degree of aggregation increases with population density. The aggregation reason is determined by the aggregation of Blackith population. When m <3.463 8 and m ≥3.463 8, it has different aggregation reasons. On this basis, Iwao’s M * - regression test equation is used to determine the best quadrat size. By comparing several sampling methods, the best five-point and leapfrog are the best and the best theoretical sampling number is Best sequential sampling model.