【摘要】 长江流域尤其下游地区是土地利用的典型地区。区域分异研究是用来阐明地理事物分布规律的重要研究方法,是区域规划和生态环境保护的重要基础工作。依据1:20万土壤数据库,采用反映土壤肥力的综合性指标,计算并输出江苏省沿江土壤肥力等级图,据此分析了土壤肥力空间分布特征,并进行了区域对比研究,可以为长江下游、特别是江苏省进行区域规划及其相关工作的开展提供科学依据。其结果也表明GIS技术和地统计学在这一领域的综合应用具有先进性,可提高区域分异工作效果。更多还原

【Abstract】 The Yangtze Valley, especially its lower reach, is the typical area of soil utilization. The study on regional diversities is an important measure illustrate geographical distribution law and important basic work of regional development and ecological environment conservation.By proposing a comprehensive index reflecting the condition of soil fertility the grade map of soil fertility with soil data-base in Jiangsu was established. According to the map,the regional characters and differences in soil fertility are analyzed. This result offers scientific reference for the implement of district programming in Jiangsu. The study shows that the application of Geo-statistics combined with GIS in the field is of advanced and efficient in the regional diversity study.更多还原