【摘要】 应用地统计学的原理和方法研究了石榴园不同时期棉蚜及草间小黑蛛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 7 33～1 2 4 0cm之间 ;草间小黑蛛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 6 4 7～ 2 0 88cm之间 ,并与棉蚜种群在数量和空间上有较强的追随关系 ,说明草间小黑蛛种群是棉蚜种群的优势种天敌 .更多还原

【Abstract】 The spatial structure and spatial correlativity of Aphis gossypii and Erigonidium graminicola populations during different periods were investigated by geostatistic methods.The results showed that the semivariogram of A.gossypii appeared as spherical type,indicating its spatial pattern was an aggregated type with a range of 7 33～12 40 cm,while that of E.graminicola was also fitted into spherical model,indicating an aggregated spatial arrangement with a range of 6 47～20 88 cm.The amount and spatial distribution of E.graminicola were closely related to those of A.gossypii ,suggesting that E.graminicola was the dominant natural enemy influencing A.gossypii population.更多还原