State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 19 Xiwai Street, 100875 Beijing, China.
J Hazard Mater. 2010 May 15;177(1-3):475-80. doi: 10.1016/j.jhazmat.2009.12.057. Epub 2009 Dec 21.
A random sample of pairs of animal feeds and manures were collected from 215 animal barns in Beijing and Fuxin regions of China. The concentrations of Cd in manures and feeds ranged from non-detectable to 129.8 mg/kg dry weight and non-detectable to 31 mg/kg dry weight, respectively. The concentrations of Cd in pig, dairy cow and chicken manures were positively correlated to those in their feeds. About 30% of the manure samples contained Cd concentrations higher than the upper limit for use in farmlands, and pig and chicken manures might be the primary contributors of Cd to farmlands. The farmlands in Beijing and around the Fuxin Downtown areas would exceed the soil quality criteria within several decades according to current manure Cd loading rates. Undoubtedly, more scientific animal production and manure management practices to minimize soil pollution risks are necessary for the two regions.
随机抽取了来自中国北京和阜新地区 215 个动物畜舍的动物饲料和粪便进行配对采集。粪便和饲料中 Cd 的浓度范围分别为不可检出至 129.8 毫克/千克干重和不可检出至 31 毫克/千克干重。猪、奶牛和鸡粪便中的 Cd 浓度与相应饲料中的 Cd 浓度呈正相关。大约 30%的粪便样本中 Cd 浓度高于农田使用的上限，猪和鸡粪便可能是农田 Cd 的主要来源。根据目前的粪便 Cd 加载率，北京及其周边阜新区域的农田将在几十年内超过土壤质量标准。毫无疑问，这两个地区需要采取更科学的动物生产和粪便管理措施，以最大程度地降低土壤污染风险。
