采用随机调查、空间分布型检验和线性回归方法，研究了甘肃民勤小茴香田藜科藜属杂草空间分布型及其抽样技术。结果表明，苗期小茴香田藜科藜属杂草空间分布型呈聚集分布。根据平均拥挤度(M*)与平均密度(■)Iwao回归关系，建立了小茴香田藜科藜属杂草防治最适抽样数模型及其序贯抽样模型。

The spatial distribution pattern and sampling technology of Chenopodiaceae Chenopodium weeds in Minqin fennel fields of Gansu Province were studied by random survey， spatial distribution pattern test and linear regression methods. The results showed that the spatial distribution pattern of Chenopodiaceae Chenopodium weeds in seedling fennel fields was aggregated. According to the Iwao regression relationship between the average crowding degree(M*) and the average density(■)， the control optimal sampling number model and sequential sampling model of Chenopodiaceae Chenopodium weeds in fennel fields were proposed.

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