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土壤盐碱加重、质量退化是黄河三角洲土地开发利用中面临的重要问题,定量客观评价土壤质量对该区土地资源合理利用与保护有重要意义。本文运用相关分析法筛选土壤质量评价指标,确定其权重,通过G IS叠加分析划分评价单元,以隶属度模型和指数和法计算土壤质量综合指标值,进而评价土壤质量。结果显示:黄河三角洲土壤总体质量较差,适宜种植业的Ⅰ、Ⅱ、Ⅲ等地仅占土地总面积的18.62%,质量最差的Ⅷ等地(光板地)占19.56%,质量中等Ⅳ、Ⅴ、Ⅵ等地占总面积56.78%;评价结果与实际作物产量高度相关。在此基础上,研究提出了该区农业生产和土地资源合理配置的措施建议。
Soil salinity aggravate and quality degradation is an important issue in the development and utilization of the Yellow River Delta. Quantitative and objective assessment of soil quality is of great significance to the rational utilization and protection of land resources in this area. In this paper, correlation analysis was used to select soil quality evaluation index, determine its weight, divide evaluation unit by GIS superposition analysis, calculate soil comprehensive quality index by membership degree model and index sum method, and then evaluate soil quality. The results showed that the overall quality of the soils in the Yellow River Delta was poor, and the suitable land for Ⅰ, Ⅱ, Ⅲ and so on only accounted for 18.62% and 19.56% of the worst land, and the medium quality Ⅳ, Ⅴ, Ⅵ and other places accounted for 56.78% of the total area; evaluation results are highly correlated with actual crop yields. On this basis, the paper puts forward some suggestions on how to rationally allocate agricultural production and land resources in this area.