桃园生草复合生态系统中桃蚜与草间小黑蛛种群的地统计学分析
Geostatistic analysis for Myzus persicae and Erigonidium graminicola population in the compound ecosystem of peach orchards
万年峰1, 2**，季香云，蒋杰贤1***，黄开华1
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作者单位：1上海市农业科学院生态环境保护研究所 上海市设施园艺技术重点实验室上海201403；2复旦大学生物多样性研究所/全球环境变化研究所 生物多样性和生态工程教育部重点实验室上海200433
中文关键词：白三叶草，桃园，桃蚜，草问小黑蛛，空间格局，地学统计学
英文关键词：Trifolium repens, peach orchard, Myzus persicae, Erigonidium graminicola, spatial pattern, geostatistics
中文摘要：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68630~120903 m、68630~126980 m，空间结构比例分别为00113~06546、00676~06129，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
英文摘要：The study was conducted in the Shanghai Municipality of Eastern China (12141°E, 3103°N, 43 m elevation) to evaluate the potential of ground cover vegetation in enhancing the pest\|controlling ability of natural enemies to pests in peach orchards. Based on the principles of geostatistics and geographic information system (GIS), the spatial distribution pattern and spatial correlation for Myzus persicae (Sulzer) and Erigonidium graminicola Sundevall population in different periods in the compound ecosystem of peach orchards with ground cover vegetation was analyzed. The spatial distribution of M. persicae and E. graminicola population was also simulated by ordinary Kriging interpretation. The results indicated that M. persicae and E. graminicola population of different periods was both correlated spatially in the study area, respectively; the ideal semivariograms of M. persicae and E. graminicola could be described by Gaussian, Circular, Exponential or Spherical Model which all indicated aggregated spatial arrangement; the both ranges of M. persicae and E. graminicola varied from 68630-120903 m, 68630-126980 m, respectively; the proportion of spatial structure of M. persicae and E. graminicola was 00113-06546, 00676-06129, respectively. It could be concluded that the “following effect” of E. graminicola on M. persicae existed in spatial distribution and E. graminicola population had great controlling effect on M. persicae, and revealed that E. graminicola was the dominant natural enemy influencing M. persicae in the compound ecosystem of peach orchards with ground cover vegetation.