摘要
该文对光肩星天牛羽化孔、排粪孔、刻槽数目做了统计分析，采用波松分布、负二项分布进行拟和，并用扩散型指数进行检验，确定了蛹、幼虫和卵的空间分布型属负二项分布．研究了林分被害的年度变化及胸径与被害关系，分析了生存率和集中度，根据Ｌｗａｏ 回归，确定了Ｘ＊ 与Ｘ 的回归直线，得出了不同虫口密度和允许误差下的最适抽样数．
The annual variation of damaged forests and the relationship between the diameter at breast height and damages were studied. The amorality and agglomeration were analysed by Lwao regression. Finally the most suitable sampling numbers in different insect densities and allowing aberration were obtained.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1999年第4期94-96,共3页
Journal of Beijing Forestry University
基金
中日专项技术合作"宁夏森林保护研究"项目
关键词
光肩星天牛
危害分析
抽样调查
Anoplophora glabripennis (Motsch.), analysis of damaging, sampling investigation
