果园土壤重金属污染调查与评价——以重庆市金果园为例

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0~20 cm和20~40 cm、桃园0~20 cm土层属轻度污染；梨园和血橙园20~40 cm、脐橙园和樱桃园0~20 cm土层的Cd含量达到警戒水平。另外，枇杷园和桃园0~20 cm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0~20 cm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。

Pollution Investigation and Assessment of Heavy Metals in Orchard Soil——A Case Study in Golden Orchard of Chongqing

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 con...