摘要
调查了低密度下棉田 2代棉铃虫卵的空间特性 ,建立了东西和南北两个方向多个变异曲线球面模型 ,其中大部分表现为纯块金效应 ;棉铃虫卵的空间变程为 4 .0～ 6 .4m ,空间不连续性强度为 0 .871～ 0 .999。
This paper studied the spatial pattern of the cotton bollworm( Helicoverpa armigera ) eggs at low density with geostatistics. Models were established at the directions of north south and west east. Most of them were pure nugget variograms. The range of the eggs were from 4.0 m to 6.4 m , and the spatial discontinuity was high from 0.871 to 0.999.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2002年第1期13-17,共5页
Journal of Huazhong Agricultural University
基金
安徽省科委"九五"科技攻关项目 (96110 0 8)
关键词
棉铃虫
空间分布
地理统计学
卵
Helicoverpa armigera ,spatial pattern,geostatistics
