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通过对田间１６个混播草坪区的系统调查和用聚集强度指标进行测定分析，１６个混播区的扩散系数Ｃ＞１，负二项Ｋ＞０，Ｃａｓｓｉｅ（１９６２）和Ｋｕｎｏ（１９６８）指标Ｃ＿Ａ＞０，Ｄａｖｉｄ和Ｍｏｏｒｅ（１９５４）丛生型指标Ｉ＞０，Ｌｌｏｖｄ聚集性指标ｍ／－ｘ＞１。用幂指数法（Ｔａｙｌｏｒ）和Ｉｗａｏ法分析的结果表明，混播草坪上锈病株的空间分布型在平均发病率８．７％～４１．２％范围内时为聚集分布，即田间个体群呈聚集分布，个体群内部分布是随机的，空间分布型属负二项分布；其聚集分布既包括病菌本身的特性，也包括对环境条件差异的反应。田间调查锈病株时，以对角线取样和Ｚ字型取样误差小，其抽样数量由平均发病率决定，发病程度越轻抽样量应越大。
Through the systematic investigation of 16 mixed sowing lawns in the field and the determination of aggregation intensity index, the diffusion coefficients C> 1, negative binomial K> 0, Cassie (1962) and Kuno (1968) C_A> 0, David and Moore (1954) Cluster index I> 0, Llovd cluster index m / -x> 1. The analysis by Taylor’s method and Iwao’s method showed that the spatial distribution patterns of the rust plants on the mixed-sowing lawn were aggregated in the range of 8.7% -41.2% of the average incidence, that is, the individual groups in the field were aggregated Distribution, the individual distribution within the population is random, spatial distribution is a negative binomial distribution; its aggregation distribution includes both the characteristics of the bacteria itself, but also includes the response to environmental differences. When investigating the rusty plant in the field, the diagonal sampling and the zig-zag sampling error are small. The sampling number is determined by the average morbidity, and the lesser the incidence, the larger the sample size should be.