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本文应用6种聚集度指标测定了水稻恶苗病株的空间分布型.并在此基础上,采用lwao—kuno(1968)法计算理论抽样数,进行了不同抽样方法和抽样数的比较.
In this paper, six kinds of aggregation index were used to determine the spatial distribution pattern of rice saprophytic strain. Based on this, the theoretical sampling number was calculated by lwao-kuno (1968) method, and the comparison of different sampling methods and sampling numbers was carried out.