江苏农田土壤生态环境调查与评价

On investigation and appraisal of ecological environment of farmland soil in Jiangsu

运用地球科学的原理和方法研究农田土壤的生态环境已成为新时期地质工作的重要内容之一。依据江苏省1∶25万土壤地球化学调查的资料,报道了江苏耕作层土壤的部分环境质量现状和有关农产品重金属元素含量超标的初步研究结果。认为深入开展江苏农田土壤环境调查与评价的意义重大,指出苏南部分地区存在重金属的显著相对富集与土壤酸化、有些地区农田土壤的营养结构欠合理、主要农田土壤中有关元素含量的有效量与总量的关系未准确把握、局部受污染农田土壤的修复调控及生态预警未真正解决、评价方法与标准及其科学指标体系急待建立等是开展农田土壤环境调查评价中必须重视或解决的关键问题。

The use of geoscientific elements and methods in the study of farmland soil ecological environment has become one of the important contents for geological work at present days. Based on the information obtained from soil geochemical investigation on a scale of 1 ： 250 000, the authors covered the preliminary study results on the partial environmental quality actuality of the farmland soils around Jiangsu and the super scale contents of heavy metal elements in the farm produce. The investigation demonstrated that a contrasting enrichment of heavy metals and soil acidification were existed in South Jiangsu, nutrition structure was not reasonable in some regions. At present, there is no idea about the relationship between the available volume and gross volume of the concerned elements in farmland soils, the restoration and adjusting as well as the early warning of the partially contaminated farmland soils has not fully solved, the appraisal method and standard and their index system need to be set up urgently. So it is of significance to make further investigation and assessment of the farmland soils in Jiangsu.