江苏高邮市农田土壤环境质量状况研究

Assessment of soil environmental quality of cropland in Gaoyou area

对高邮市域内的约670km2农田进行采样监测,利用Arcinfo软件绘制出该地区10种常见污染物的分布特征图,并根据土壤环境质量二级标准对该地区农田土壤环境质量现状进行了评价分析,在此基础上对3个典型地区土壤近20a内污染物含量状况及变化趋势进行了分析.结果表明,与1985年相比,近20a中,土壤中铜、铅、铬、汞、砷含量没有明显增加趋势;川青地区土壤中镉、车逻地区土壤中镍元素含量显著升高,其它地区含量没有显著变化;土壤锌含量在3个地区均有明显增加趋势;30个乡镇中综合污染指数P综相对较高的地区有郭集、横泾和汤庄;依据土壤环境质量二级标准评价分析,高邮地区农田土壤环境质量基本能满足农产品安全生产的条件.

Based on sampling and monitoring of about 670km^2 cropland in Gaoyou, a 10-eommon-ponutant distribution map of the studied region was plotted with the aid of ARCINFO software and soil environmental quality of the cropland was evaluated in light of Grade Ⅱ Criteria of the Standard for Soil Environmental Quality. On such a basis, variation of concentrations of the pollutants in three typical regions in the past 20 years was analyzed. Results indicate that compared with the situation in 1985, no significant rising trend is observed with the concentration of Cu, Pb, Cr, Hg and As in the soil; the Cd content in Chuanqing, Ni content in Cheluo, and Zn in all the three typical regions is significantly higher; and among the 30 towns and townships, Guoji、Hengjing and Tangzhuang is comparatively higher in integrated pollution index. So according to Grade Ⅱ Criteria of the Standard for Soil Environmental Quality the soil environment quality in Goayou satisfies the basic requirements for production of safe agricultural produce.