论文部分内容阅读
通过对德昌松毛虫各虫态空间分布结构的研究 ,确定德昌松毛虫具有聚集特性。对其平均虫口密度与平均拥挤度进行回归分析 ,确定在一定虫口密度和误差下的最适抽样数和序贯抽样在生产实践中的应用。
By studying the spatial distribution structure of each insect state of Dendrolimus punctatus, the aggregation characteristics of Dendrolimus punctatus were confirmed. The average population density and average crowding degree of the regression analysis to determine the population density and error in a certain number of optimal sampling and sequential sampling in the production practice.