基于五等级集对分析的土壤质量等级评价

Evaluation on Soil Quality Grade Based on Five-grade Set Pair Analysis

土壤是我国农业可持续发展的物质基础,是粮食安全的保障.土壤质量是评价土地可持续利用的依据.土壤质量等级评价方法的优劣对于指导农业生产实践具有重要意义.五等级集对分析法针对土壤质量评价标准,将集对分析的状态空间由三扩展到五,采用超标加权法确定各评价指标权重,根据联系度与土壤样本所属级别具有同一度的关系,确定土壤质量所属等级.与现有土壤质量等级评价方法比较的结果表明,在土壤质量等级评价中引入五等级集对分析法是可行的,其评价结果更精确.

Soil is not only a material base for agricultural sustainable development, but also a guarantee of food security in our country. Soil quality is a tool to evaluate soil sustainable utilization, and its evaluation method has an important significance for guiding agricultural production practice. According to the feature of soil quality standards, the five-grade set pair analysis extended the state space from three to five, the factors＇ weights were determined with the method of over standard with weight, the grade of soil quality was determined according to the relation that the connection degree and the grade of soil sample belongs to the identical degree. In contrast with the result of the existing evaluation method of soil quality, the result from the five-grade set pair analysis is more accurate, so a- sing the five-grade set pair analysis to evaluate the soil quality is feasible.