摘要
本文在测定油松毛虫幼虫静态格局和动态格局的条件下,全面而系统地进行了株抽样、轮抽样和“枝”抽样的研究。根据幼虫在各轮垂直分布的特征和喜食二年生针叶的特性,建立回归模型,从轮抽样发展到“枝”抽样,通过检验,预报精度在91—98％之间。轮抽样比株抽样平均提高效率6倍,“枝”抽样比轮抽样又平均提高1.5倍。如费用以每株0.20元计,轮抽样比株抽样每株平均减少0.16元,“枝”抽样每株又减少0.032元。
Under condition that the statical and dynamical patterns of Dendrolimus tabulae-formis larvae were tested, have been studies conducted systematically on the tree sampling, ring sampling and branch sampling. Based on the characteristics of the vertical distribution of the larvae on each ring of Chinese pine, it was found that tree sampling is simplified to ring sampling by cresting ring regression models. According to speciality of the larvae feeding mainly biennial pineneedle. the ring sampling was also fuither simplified to branch sampling by creating branch regression models. The results are as foliows.(1) the forecasting precisions of ring regression models are generally 91-98% and those of branch regression models are mostly more than 91%; (2) the efficiency of ring sampling could be raised to 6 times more than that of tree sampling while the difficiency of branch sampling could be further raised to 1.5 times more than that of ring sampling; (3) the sampling cost is 0.2 RMB Yuan for each tree sampling, 0.16 RMB Yuan for each ring sampling, and 0.032 RMB Yuan for each branch sampling.
出处
《生态学报》
CAS
CSCD
北大核心
1989年第4期341-347,共7页
Acta Ecologica Sinica
关键词
油松毛虫
株抽样
枝抽样
轮抽样
Dendrolimus tabulaefurmis, tree sampling, ring sampling, branch sampling.
