摘要
运用两种回归方法和四种聚集度指标对沙棘绕实蝇幼虫的空间格局进行了研究。结果表明，沙棘绕实蝇幼虫在其危害的沙棘林内呈聚集分布并遵从负二项分布。按照m－m回归法，确定了理论抽样数和序贯抽样方案。
Two regression models and four indices of aggregation were used toexamine the spatial distribution pattern of Rhagoletis batava obsecerlosa larvae, theresult indicated that the distrihution of R. batava obseceriosa larvne was inaggregate pattern and in compliance with negative binomial in harrned Hippophaeybamuoides forest. The number of theoretic sampling and plan of sequentlal sam- pling were established by m -m rogression method.
出处
《陕西林业科技》
北大核心
1998年第3期78-81,共4页
Shaanxi Forest Science and Technology
关键词
沙棘绕实蝇
空间格局
聚集分布
序贯抽样
Rhagoletis batava obseceriosa
Distribution pattern
Aggregate distribution
Sequential sampling
