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基于地理信息系统(GIS)技术,将宁夏固原市原州区不同时期耕地苜蓿斑蚜种群分布插值图与生态气候图、数字高程图进行叠加,分析了苜蓿斑蚜密度与生态环境和地理分布之间的关系.结果表明:研究区苜蓿斑蚜的分布和发生程度与气候、地貌和海拔密切相关,苜蓿斑蚜在研究区的适宜生境为海拔1440～2000m的半干旱平原区和半干旱丘陵区,最易暴发成灾的区域为海拔1600～1800m的半干旱平原区.苜蓿斑蚜的适宜生境与不同时期的空间分布插值图相结合,可定量分析各生态区苜蓿斑蚜种群的空间动态.
Based on the geographic information system (GIS) technology, the interpolation plots of Aphis gossypii Glover population in different periods in Yuanzhou District, Guiyang City, Ningxia Province were overlaid with the ecological climate map and digital elevation map. The relationship between density and ecological environment and geographical distribution of Alfalfa plague was analyzed The results showed that the distribution and occurrence of Aphis gossypii in the study area were closely related to the climate, physiognomy and elevation. The suitable habitats of A. aldicarb in the study area were semi-arid plains and semi-arid hilly areas with an elevation of 1440 ~ 2000 m, The most prone to outbreak of the disaster area is 1600 ~ 1800m above sea level in semi-arid plains area.The suitable habitat of alfalfa aphid and the spatial distribution interpolation map in different periods can quantitatively analyze the spatial dynamics of the population of Aphis gossypii in various ecological regions.