宁德市茶园土壤重金属分布特征及评价

Characteristics of heavy metal distribution in the soil of Ningde city tea plantation and assessment

测试了宁德市茶园土壤中13种重金属的含量,并研究其分布特征,采用单项污染指数法和内梅罗综合指数法对宁德市茶园土壤重金属污染环境质量和土壤环境质量进行了评价.结果表明,在宁德市茶园土壤重金属污染单项评价中,平均值均未超标,但个别因子最大值超过1.0,为超标;在土壤重金属污染综合评价中属清洁,即茶园的土壤质量安全,但个别样点接近或略微超出警戒限,应引起必要重视.

The research tested 13 kinds of heavy metal contents in the soils of the tea plantations in Ningde city and studied its distribution characteristics.Using the individual pollution index and comprehensive index method based on Nemero,an assessment has been made on the heavy metal pollution in the soils of the tea plantations concerning the environmental quality and soil quality in Ningde city.The results show that,in the monomial evaluation of the heavy metal pollution in the soil of tea plantations in Ningde,the average did not exceed the standard,but the individual factor maximum value has exceeded the standard by1.0.The heavy metal pollution in the soil in the comprehensive evaluation is clean,namely the quality of the soil is safe,but a some sample point was close to or slightly exceeds the alarm limit,to which due attention should be paid.