农用地土壤重金属超标评价与安全利用分区

发布时间：2018-04-20 19:35

本文选题：土壤 + 重金属　；参考：《农业工程学报》2016年23期

【摘要】：土地资源是大自然馈赠给人类的独特珍品,承载万物。开展区域农用地土壤重金属超标评价与安全利用分区、分类利用管控,促进区域土地资源合理、高效利用是新常态下耕地保护的基本要求。该文分不同p H值区间、8种不同地类,基于现行土壤环境质量评价和食品安全评价的众多标准集成土壤环境质量现状评价标准,以江苏省某市为例,运用单因子指数法、内梅罗综合指数法和潜在生态危害指数法开展土壤重金属超标评价,进而提出了安全利用等级划分方案和分区、分类利用与管理的管控策略。结果表明:将研究区农用地分为安全、基本安全、低风险、中风险和高风险5种综合分区,分别采取优先保护、综合监控、预警防控和限制利用等措施,以精细化管理思想为出发点,从源头控制、农艺措施调控、种植作物调整、地类转换以及土壤修复、综合整治等方面提出了各综合分区的安全利用管控策略。因此,开展区域农用地土壤重金属超标评价与安全利用分区研究为确保土地资源合理利用保护耕地提供了重要思路。
[Abstract]:Land resources are the unique treasures that nature presents to mankind, carrying all things. It is the basic requirement of cultivated land protection under the new normal condition to carry out the evaluation of heavy metals in the soil of regional agricultural land and the zoning of safe utilization, to control the classified utilization of heavy metals, to promote the rational use of regional land resources and to make efficient use of farmland. In this paper, there are 8 different land types with different pH values. Based on many standards of current soil environmental quality assessment and food safety assessment, the evaluation criteria of soil environmental quality status are integrated. Taking a city in Jiangsu Province as an example, a single factor index method is used. Nemero comprehensive index method and potential ecological hazard index method were used to evaluate soil heavy metals in excess of the standard, and then the control strategies of safety utilization grade, zoning, classification, utilization and management were put forward. The results show that the agricultural land in the study area is divided into five types: safety, basic safety, low risk, medium risk and high risk, and the measures of priority protection, comprehensive monitoring, early warning, prevention, control and restriction of utilization are taken respectively. Based on the idea of fine management, this paper puts forward the control strategies of the safety utilization of each comprehensive zoning from the aspects of source control, agronomic measures, crop planting adjustment, land class conversion, soil remediation and comprehensive remediation, etc. Therefore, the evaluation of heavy metals in the soil of regional agricultural land and the study on the zoning of the safe use of heavy metals provide an important way to ensure the rational utilization of land resources and the protection of cultivated land.
【作者单位】：中国地质大学(北京)土地科学技术学院;国土资源部土地整治重点实验室;国土资源部土地整治中心;江苏省地质调查研究院土地质量评价与污染防治应用研究中心;
【基金】：国土资源部公益性行业专项经费项目(201511082)
【分类号】：X53;X825

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