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应用GIS技术,结合层次分析法和模糊数学综合评价方法等现代统计分析技术,以甘肃省肃州区为例,对河西走廊灌溉农业区耕地地力进行综合评价,研究其影响该区域耕地地力的主要指标。结果表明,影响该区域耕地生产潜力主要指标顺序依次为:剖面构型>障碍层位置>质地构型>灌溉保证率>土体含盐量>有机质>有效土层厚度>海拔高度>障碍层厚度>有效磷>灌溉模数>土壤侵蚀程度>速效钾。肃州区耕地地力等级可分为四等,一、二、三等地占的比例较大,分别为36.1%、37.2%和21.6%,占总耕地的94.9%,四等地占的比例较小,为5.1%。与国家耕地地力等级对比,肃州区一至四等地,分别对应国家三至六等地,因此,该区域耕地生产能力普遍较高。
Using GIS technology and modern statistic analysis techniques such as analytic hierarchy process (AHP) and fuzzy mathematics comprehensive evaluation method and so on, taking Gansu Province as an example, comprehensive evaluation of cultivated land productivity in irrigated agricultural areas of Hexi Corridor is carried out. The main influencing factors of cultivated land productivity in Hexi Corridor are studied index. The results showed that the main indexes affecting the potential of arable land productivity in this region were as follows: profile configuration> barrier location> texture configuration> irrigation guarantee rate> soil salinity> organic matter> effective soil thickness> altitude> barrier layer thickness > Available phosphorus> irrigation modulus> soil erosion> available potassium. The grade of cultivated land in Suzhou area can be divided into four grades. The proportions of one, two, three and so on are larger, accounting for 36.1%, 37.2% and 21.6% respectively, accounting for 94.9% of the total cultivated land. Small, 5.1%. Compared with the national cultivated land fertility level, the first to fourth places in Suzhou district correspond to the third to sixth places of the country respectively. Therefore, the cultivated land productivity in the region is generally high.