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论文以山东禹城市为例,进行了盐渍土改良区耕地土壤适宜性评价研究。采用灰色关联分析法与Delphi法结合筛选参评因素,用层次分析法(AHP)确定其权重,建立了土壤适宜性综合评价模型。通过比较空间插值方法后,采用反距离加权(IDW)空间插值技术,获取了研究区土壤适宜性等级空间分布图。结果显示,禹城市耕地土壤适宜性总体状况良好,Ⅰ、Ⅱ等级面积占27.24%;Ⅲ、Ⅳ等级面积占45.48%,Ⅴ、Ⅵ等级面积占27.28%。耕地土壤适宜性等级分布受到地形地貌的影响,由地势较高的河滩高地向地势较低的洼地过渡,土壤适宜性变差;土壤适宜性等级分布同时受引黄灌溉的影响,在引黄干渠的低洼处,土壤适宜性差。该研究探索了盐渍土改良区耕地土壤适宜性的评价技术方法,对盐渍土改良区耕地资源的持续利用和土壤改良有积极意义。
The paper takes Yucheng City, Shandong Province as an example, and studies the suitability of cultivated land in saline soil improvement area. Gray relational analysis method and Delphi method were used to screen parameters of participating factors, AHP was used to determine its weight, and a comprehensive evaluation model of soil suitability was established. After comparing the spatial interpolation methods, the space suitability of the soil in the study area was obtained by using the inverse distance weighted (IDW) spatial interpolation technique. The results showed that the soil suitability of cultivated land in Yucheng was generally good. The areas of Ⅰ and Ⅱ accounted for 27.24%, the areas of Ⅲ and Ⅳ accounted for 45.48% and the areas of Ⅴ and Ⅵ accounted for 27.28%. Soil suitability grade distribution of arable land is affected by the topography and topography, from high lying terrain to lower land lowland, soil suitability deteriorates; Soil suitability grade distribution is also affected by the Yellow River irrigation, Low-lying place, poor soil suitability. This research explored the evaluation method of soil suitability of arable land in the improved area of saline soils. It has positive significance for the sustainable utilization of arable land resources and soil improvement in the area where the saline soil is improved.