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利用地统计学原理和地理信息系统(GIS)分析了桃园生草模式下不同时期桃蚜Myzus persicae(Sulzer)种群和草间小黑蛛Erigonidium graminicola Sundevall种群的空间分布格局和空间相关性。结果表明,不同时期桃蚜和草间小黑蛛种群均存在较强的空间相关性,其理想的半变异函数曲线为高斯、圆型、指数或球型,其空间格局均呈聚集分布,变程范围分别为6.8630~12.0903 m、6.8630~12.6980 m,空间结构比例分别为0.0113~0.6546、0.0676~0.6129,表明桃园生草模式下桃树草间小黑蛛对桃蚜在空间位置上具有追随关系,对其种群数量的控制有较大作用,草间小黑蛛是桃蚜的优势天敌。
Spatial distribution patterns and spatial correlations of Myzus persicae (Sulzer) population and Erigonidium graminicola Sundevall population at different periods were analyzed by geostatistics and geographic information system (GIS). The results showed that the population of Myzus persicae and A. lanceolata had a strong spatial correlation in different periods. The ideal semi-variogram curve was Gaussian, circular, exponential or spherical with the spatial distribution of aggregation The ranges ranged from 6.8630 to 12.0903 m and from 6.8630 to 12.6980 m, respectively, and the spatial structure ratios were 0.0113-0.65646 and 0.0676-0.6129, respectively. The results showed that there was a follow-up relationship between the spatial structure of Myzus persicae , Has a great effect on the control of the population quantity, and the small black spider is the dominant natural enemy of Myzus persicae.