尤溪县金柑园土壤重金属污染状况及其风险评估-《福建农业科技》(2022年3期).docx

龙源版权所有 尤溪县金柑园土壤重金属污染状况及其风险评估作者：黄锐敏 郑云云 苏德森来源：《福建农业科技》2022年第03期 摘 要：為明晰尤溪县金柑园土壤中重金属含量现状，并对其进行风险评估。采集来自尤溪县管前镇和八字桥乡20个果园共100件土壤样品，分析了As、Hg、Pb、Cd、Cu、Cr等重金属含量，并采用单因子指数法、内梅罗综合指数法和Hakanson潜在生态风险指数法对土壤污染情况进行评估。结果表明：尤溪县金柑园土壤样品pH在4.52～6.45，呈弱酸性。重金属含量均符合农用地土壤污染风险管控国家标准对旱田土壤环境质量的要求。20个果园中6种重金属的单因子污染指数除Hg外均在0.7以内;综合污染指数大于0.7小于1，表明土壤中6种重金属污染处于警戒线水平。潜在生态风险评估指数为126.4，表明尤溪县主要金柑果园土壤处于轻度生态危害水平。尤溪县20个金柑果园土壤中6种重金属虽然达到轻度污染水平，但还处于果园安全生产对产地土壤中重金属含量限定的范围内。 关键词：金柑;产地环境;重金属;风险评估 中图分类号：S 666 文献标志码：A 文章编号：0253-2301（2022）03-0057-06 DOI： 10.13651/j.cnki.fjnykj.2022.03.010 Heavy Metal Pollution in the Soil of Kumquat Orchards in Youxi County and Its Risk Assessment HUANG Rui-min， ZHENG Yun-yun， SU De-sen* [Laboratory of Agricultural Product Quality and Safety Risk Assessment， Ministry of Agriculture and Rural Affairs （Fuzhou）/Institute of Agricultural Quality Standards and Testing Technology， Fujian Academy of Agricultural Sciences/ Fujian Key Laboratory of Agricultural Product Quality and Safety， Fuzhou， Fujian 350003， China] Abstract： In order to clarify the present situation of heavy metal content in the soil of kumquat orchards in Youxi County and to evaluate its risk， a total of 100 soil samples were collected from 20 orchards in Guanqian town and Baziqiao town of Youxi County， and the contents of heavy metals such as As， Hg， Pb， Cd， Cu and Cr were analyzed. Then， the soil pollution was evaluated by the single factor index， Nemero comprehensive index and Hakanson potential ecological risk index. The results showed that the pH of the soil samples from the kumquat orchards in Youxi County ranged from 4.52 to 6.45， showing the weak acidity. The contents of heavy metals all met the requirements of the national standards for soil pollution risk control of agricultural land. The single factor pollution indexes of six heavy metals in the 20 orchards were all within 0.7 except Hg. The comprehensive pollution index was greater than 0.7 and less than 1， indicating that the pollution of six