属聚集分布的植物病害应采用负二项理论抽样法决定田间调查数量。负二项理论抽样公式简化计算的关键是应求解公共k(k_c)值,但植物病害的k_c一般不易取得。把Taylor幂法则引入负二项理论抽样公式,可以推导出: 无放回抽样 有放回抽样替代原公式,不但有一定的理论价值,而且有重要的实践价值。 A collection of plant diseases should be distributed negative two theoretical sampling method to determine the number of field surveys. The key to simplifying the calculation of the negative two-theory sampling formula is that the public k (k_c) value should be solved, but the k_c of plant diseases is generally not easy to obtain. By introducing the Taylor power law into the negative two-theory sampling formula, it can be deduced that there is not only a theoretical value but also an important practical value for the non-back-sampling with the substitution and sampling instead of the original formula.