摘要
通过应用种聚集度指数和种回归方法,对荔枝尖细蛾幼虫的空间格局和抽样技术进行研究。所有指52标表明,荔枝尖细蛾幼虫在田间呈聚集分布,分布的基本成分是个体群,且个体间相互吸引。在空间格局研究的基础上提出了理论抽样数,并通过不同抽样方式的精度比较,得出平行线抽样方式最佳。
Two regression models and five indices of aggregation were used to examine the spatial patterns of Cono-pomorpha litchiella Bradley larvae. All indices indicated that the distribution of Gonopomorpha litchiella Bradley larvae was of an aggregated pattern. The larvae occur as colonies and the distribution of the colonies is aggregated. The theory sampling number was presented on the base of the spatial pattern. Several sampling methods were compared and the results showed that the parallel sampling method is the best.
出处
《云南热作科技》
2002年第2期11-13,共3页
Journal of Yunnan Tropical Crops Science & Technology
关键词
荔枝
尖细蛾
幼虫
空间格局
抽样技术
Conopomorpha litchiella Bradley
larvae
space distribution type
sample methods
