基于农业地质调查成果的开封市土壤质量综合评价

Soil Quality Integrate Evaluation Based on Agricultural Geological Survey Results in Kaifeng City

从土壤质量的内涵出发,选取农业地质调查中土壤环境质量、肥力与健康质量的土壤地球化学指标,采用内梅罗指数、加权指数和模型及综合比较分析等方法对开封市的土壤质量进行评价。开封市土壤质量由高至低划分为5个等级,其中土壤环境质量1级到5级的面积比例分别为99.13%,0.39%,0.37%,0.05%,0.05%,仅极少量的城市郊区土壤表现出一定程度的污染;土壤肥力与健康质量1级到5级面积比例分别为0.35%,26.65%,46.27%,17.20%,9.53%;土壤综合质量1级到5级的面积比例依次为0.04%,26.50%,46.47%,17.34%,9.65%。本研究拓展了农业地质调查成果的应用范围,所采用的研究方法减少了单项指标评价的单一性,提高了评价结果的科学性。应用叠加法直观地显示出单项质量评价结果与综合评价结果存在的差异,为评价成果的应用奠定了基础。综合评价结果对农业生产布局、粮食安全和绿色产能评价等具有实践意义。

According to the connotation of soil quality, some soil geochemistry properties about soil environmental quality, fertility quality and health quality were selected as soil comprehensive quality evaluation indexes in Kaifeng City. The methods of Nemero index, weighted index and model and comprehensive comparison analysis were employed. The soil quality from high to low is divided into five grades in Kaifeng City. The area proportion of soil environment quality from grade 1 to grade 5 was 99.13% , 0.39% , 0.37% , 0.05% and O. 05% respectively, in which only a few plot appeared pollution to a certain degree in city suburbs. The area proportion of soil fertility and health quality was 0.35%, 26.65%, 46.27%, 17.20% and 9.53% respectively. The area proportion of the soil comprehensive quality in Kaifeng City from grade 1 to grade 5 respectively was 0.04% , 26.50% , 46.47% , 17.34% and 9.65%. The research expanded the application scope of the agricultural geological survey. The methods adopted in this research reduced the subjectivity and improved the rationality comparing with single evaluation. The overlay revealed visually the differences between single and comprehensive evaluation results, which established a foundation for the evaluation application. The soil comprehensive evaluation results might have practice significance on the agricultural planting regionalization, food security and green productivity evaluation.