灰色关联度分析法在土地评价中的应用

作者选取四川省"金土工程"数据库中的原始数据作为研究基础,通过应用灰色系统理论的关联分析方法,以坡度、地面岩石露头、灌溉保证、排水条件、土壤构型、有效土层厚度、土壤酸碱度和土壤有机质作为与水稻平均产量相关的因子进行多因素关联分析,结果显示该区域排水条件与其产量具有最大的关联度.这说明在四川地区水稻地排水条件的优劣最大程度地决定着水稻的产量.通过各要素权重值的计算得到该地区土地等级划分范围.表明在土地评价中运用灰色关联度分析方法可减少人为的经验误差,同时该方法简单易行,结果可信度高.

Application of the grey related theory to land evaluation

The authors select some factors(such as slope,rock exposure,irrigation,drainage condition,soil configuration,available depth of soil,pH,soil organic matter) as the base of the study and analyze the factors by the gray system theory.The intension of this article is to apply the method to the land evaluation by the correlative analysis which relates to the average output of rice.The result shows that the drainage conditions have the largest degree of correlation with the output.The area is devided by an extent of the land scale by calculation of weight. The method can reduce the man-made experience error and is simple to calculate.The result deserve trust.