摘要
根据杨树天牛危害的特点,应用Capture—Recapture模型,以两次抽样代替两次捕捉试验估计害虫发生量,精度在80%以上。两次抽样采用系统抽样与随机抽样相结合的办法,构成系统随机样本,抽样强度在15%以上,收到良好的效果。
A capture-recapture model is applied to estimate the occurrence quantity of poplar longicorn. There the two-time capture test was replaced by two-time sample surrey. Systematic random sample was adopted in sampling. When sampling rate is 15%, its estimating precision and practical precision outstripes 80 %.
出处
《西北林学院学报》
CSCD
1995年第2期40-45,共6页
Journal of Northwest Forestry University
基金
国家"八五"攻关专题
关键词
天牛
发生量
估计模型
精度
杨树
estimating model
precision
systematic random sample