小茴香田藜科藜属杂草空间分布型及其抽样技术
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摘要：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。
关键词：小茴香;藜科藜属;空间分布型;理论抽样模型
中图分类号：S567 文献标志码：A 文章编号：1001-1463（2021）11-0024-04
doi：10.3969/j.issn.1001-1463.2021.11.006
Spatial Distribution Pattern and Sampling Technology of Chenopodi-aceae Chenopodium Weeds in Fennel Fields
LI Ping
（Wuwei Agricultural and Technology Extension Center， Wuwei Gansu 733000， China）
Abstract：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.
Key words：Fennel;Chenopodiaceae Chenopodium;Spatial distribution type;Theoretical sampling model
甘肃是全国中药材重要产区，小茴香（Foeniculum vulgare Mill.）是甘肃特色药材资源之一，也是甘肃现代农业优势产业与脱贫攻坚支柱型产业之一。