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对 8块烟田的龟纹瓢虫空间分布调查和分析结果表明 ,该虫空间分布符合负二项分布 ,均属聚集分布 ,聚集的原因主要是由环境因素所致 ,抽样方式以棋盘式抽样代表性最强
The investigation and analysis on the spatial distribution of Propylaea japonica in 8 tobacco fields showed that the spatial distribution of this insect accorded with the negative binomial distribution and all belonged to the aggregation distribution. The reasons for the accumulation were mainly caused by environmental factors. The sampling method was checkerboard sampling The most representative