摘要
监测重庆市金果园土壤剖面中的重金属含量,结合绿色食品产地土壤环境质量标准,采用污染指数法进行评价。结果表明,各园区土壤中Cd的单因子污染指数较高,其中枇杷园和葡萄园0-20cm和20-40cm、桃园0-20cm土层属轻度污染;梨园和血橙园20-40cm、脐橙园和樱桃园0-20cm土层的Cd含量达到警戒水平。另外,枇杷园和桃园0-20cm土层中Pb含量也处于警戒水平。从内梅罗污染指数来看,梨园、蜜橘园、枣园、樱桃园、血橙园和脐橙园均小于0.7,土壤环境质量判定为清洁;枇杷园、桃园和葡萄园0-20cm土层在0.7-1之间,土壤环境质量为尚清洁。为进一步提高果品品质,该果园应当采取措施控制土壤Cd、Pb污染。
In this paper, the contents of heavy metals in soil profile of golden orchard in Chongqing were monitored, and pollution assessment was performed by using pollution indices based on soil environmental quality standard of producing area of green foods. The results showed that the single factor pollution indices of Cd in each park were higher than that of other heavy metals, 0-20 cm and 20-40 cm soil layers in loquat garden and grape garden, 0-20 cm soil layer in peach garden reached lightly polluted. The content of Cd in 20-40 cm soil layer in pear garden and blood orange garden, 0-20 cm soil layer in navel orange garden and cherry garden reached alert level. In addition, the contents of Pb in 0-20 cm soil layer in loquat garden and peach garden were also in alert level. Nemerow pollution indices of the soil in pear garden, mandarin orange garden, jujube garden, cherry garden, blood orange garden and navel orange garden were all less than 0.7, and soil environmental quality was judged as clean; nemerow pollution indices of 0-20 cm soil layer in loquat garden, peach garden, grape garden was in the range of 0.7-1, and soil environmental quality was judged as nearly clean. Pollution investigation and evaluation results indicated the orchard should be taken measures to control Cd and Pb pollution in soil so as to improve fruit quality further.
出处
《中国农学通报》
CSCD
北大核心
2011年第14期244-249,共6页
Chinese Agricultural Science Bulletin
基金
公益性行业(农业)科研专项经费资助项目"都市型农业生产结构与种养殖模式研究"(200903056)
关键词
果园土壤
重金属
污染调查
污染评价
orchard soil
heavy metal
pollution investigation
pollution assessment
