衡阳市菜园使用的商品有机肥和有机废弃物中重金属含量状况调查

Investigation of Heavy Metals Contents in Commercial Organic Fertilizer and Organic Wastes Used by Vegetable Garden in Hengyang City

对衡阳市菜园使用的12个有机肥样品中的Zn、Cu、Cr、Pb、Cd、Ni、Hg和As的指标进行检测,样品中重金属总As、总Hg、总Pb、总Cd、总Cr等的含量按照中国NY525—2012有机肥料重金属限量指标,总Ni、总Cu、总Zn重金属参照德国腐熟堆肥中重金属限量标准进行分析,结果表明,除牛粪、菜籽饼肥外,有9个样品均发现有超限量值的重金属成分,超标样品数占总样品数的75%,超标的重金属成分以Cu和Zn较为普遍,分别占样品总数的75%和41.7%.而在超标程度方面,有两个样品的中的Cu和两个样品中的Cr均为严重超标.这些肥料使用不当,对菜园土和蔬菜品质产生不良影响,应给予关注.

The content of heavy metals as Zn, Cu, Cr, Pb, Cd, Ni, Hg and As in the samples of the 12 organic fertilizers used in Vegetable Garden of Hengyang City were detected, heavy metals in samples of total As, total Hg, total Pb, total Cd, total Cr according to the organic fertilizer heavy metal index of China NY525-2012. The total Ni, total Cu, total Zn of heavy metals were analyzed according to the standard limit of heavy metals in Germany mature compost. The results show that in addition to cattle manure and cake ,9 samples were found to have heavy metals over the limited value, and the number of samples exceeded 75 percent of the total samples. Among the heavy metals exceeding the standard, Cu and Zn were more common,which respectively account for 75% ,41.7% of the total samples. While in the exceeding standard, there were two samples of Cu and two samples of Cr severely exceeding the standard. Improper use of these fertilizers, adverse effects on vegetable garden soil and vegetable quality, should be given at- tention. 2tabs. ,Trefs.