【摘要】 应用地学统计学的原理和方法研究了不同时期棉蚜及龟纹瓢虫种群的空间结构和空间相关性 .结果表明 ,不同时期棉蚜种群的半变异函数曲线皆为球型 ,其空间格局为聚集型 ,变程在 8 2 1～ 10 81m之间 ;龟纹瓢虫种群的拟合半变异函数曲线也表现为球型 ,呈聚集空间格局 ,空间变程在 8 0 1～ 14 2 5m之间 ,并与棉蚜种群在数量和空间上有较强的追随关系 ,说明龟纹瓢虫种群是棉蚜种群的优势种天敌 .更多还原

【Abstract】 The spatial construction and distribution of Aphis gossypii and Propylaca japonica at different period were investigated with geostatistics.The results showed that the semivariogram of Aphis gossypii was described by spherical model,indicating an aggregated spatial arrangement,the range was 8\^21～10\^81m.The semivariograms of Propylaca japonica was fitted by spherical model too,also indicating an aggregated spatial arrangement,its range was 8\^01～14\^25m.The amount and spatial distribution of Propylaca japonica was closely related to that of Aphis gossypii. It reveals that Propylaca japonica is dominant natural enemies of influening population of Ahphis gossypii.更多还原