摘要
为了提高对油桐尺蠖预测预报准确性,应用聚集度指标法、Iwao法和Taylor法等对油桐尺蠖幼虫的空间分布型进行测定检验,结果表明油桐尺蠖幼虫呈聚集分布,其聚集强度是随着种群密度升高而增加。应用Iwao抽样通式建立理论抽样数模型,由此确定了一套油桐尺蠖幼虫在不同密度下的理论抽样数表,并在此基础上提出了最佳理论抽样数和序贯抽样模型。
The spatial distribution pattern of Buasra suppressaria Guenee in Eucalyptus forest were studied. The testing method included the aggregated indices method,Iwao method,and Taylor power law method.All of three methods shown that the distribution pattern of B. suppressaria is the assemble distribution type. Moreover,the assemble distribution index increased along with the increasing of their population density. Based on the distribution pattern,we proposed the best sampling method,the best theoretical sampling method,and sequential sampling model.
出处
《青海农林科技》
2016年第3期29-31,共3页
Science and Technology of Qinghai Agriculture and Forestry
关键词
油桐尺蠖
桉树
空间分布型
抽样技术
Buasra suppressaria Guenee
Eucalyptus
Spatial distribution pattern
Sampling method
