基于遥感与GIS的三江平原耕地质量评价与生产力分析

Quality evaluation of cultivated and analysis productivity in Sanjiang Plain based on remote sensing and GIS

耕地资源数量和质量对粮食生产和安全构成持久约束,三江平原人均耕地数量较多,耕地质量成为影响粮食产量的重要因素.通过建立三江平原耕地质量评价体系,结合AHP方法对各项指标权重进行分析,借助地理信息系统(geological information system,GIS)空间分析技术计算耕地质量综合得分,按得分对三江平原耕地质量与生产力进行了分析评价.结果表明:三江平原耕地质量整体上较好,四等以上耕地占总面积的96%以上;低等级耕地主要分布在大片耕地的边缘,向山区延伸的区域.以行政区为单位对比分析耕地质量与生产力,一些耕地质量高的区域,仍然具有较大的生产潜力.

This paper analyzed the cultivated land quality in Sanjiang Plain,which is of great significance to realize the managements of cultivated land from emphasizing on its quantity unilaterally to on its quantity and quality comprehensively.Methods employed include analytic hierarchy process and spatial analysis of geographic information system combining remote sensing data.Consequently,comprehensive evaluation method is applied to the cultivated land evaluation and the grades of cultivated land quality are classified based on 100 m×100 m raster data.The result shows that,the quality of cultivated land,Sanjiang Plain is better,there are about 96% of the total area above the fourth grades;low levels of cultivated land is mainly distributed in the edge of the cultivated land.This study explores the technical methods of the land quality evaluation based on raster data in grain production area and has noticeable significance to the sustainable use of cultivated land resources in intensive agricultural area.