摘要
1984～1985年在福建省沙县和三明市郊调查了杉梢小卷蛾幼虫和蛹的空间分布,用比较频次法和几种聚集度指标进行分布型的测定。结果表明,幼虫和蛹多数样地都符合聚集分布。估计了最适抽样数,比较了五种抽样方法的适用性,提出了幼虫和蛹的最佳抽样方法。求得的有虫(蛹)株率与百株虫(蛹)量的回归式,可供生产上应用。
The present paper deals with the spatial distribution patterns and sampling technique of Polychrosis cunninghamiacola which were carried out in Sha county and the suburbs of Sanming city, Fujian province from 1984 to 1985. Frequency chech methods and several aggregation indices were used to determine the spatial distribution patterns. Most larvae and pupae were of aggregated patterns. The optimal sampling sizes were determined. Five sampling methods were compared and the ones most suitable for the investigations of larvae and pupae were suggested. The equations based on the relationships between percentage of the trees with larvae or pupae and the numbers of larvae or pupae per 100 trees were built up, they can be applied to practical investigations.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
1989年第4期80-84,共5页
Journal of Nanjing Forestry University：Natural Sciences Edition
关键词
杉树
小卷蛾
空间分布
抽样技术
Polychrosis cunninghamiacola
Spatial distribution patterns! Sampling techniques
