Contribution of additives Cu to its accumulation in pig feces: study in Beijing and Fuxin of China

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	Contribution of additives Cu to its accumulation in pig feces: study in Beijing and Fuxin of China
	Li Yan-Xia ; Li Wei ; Wu Juan ; Xu Li-Chao ; Su Qiu-Hong ; Xiong Xiong
	2007
关键词	Additives Contamination Copper Farms Soil pollution
英文摘要	Massive amounts of pig manure are produced by intensive pig farm in China, and the composition of pig manure has changed much due to the use of feed additives. However, little is known about the exact Cu (copper) feed as additives or present as contaminants in pig feed and the residues in feces. One hundred and thirty-seven feeds and one hundred and forty-two fecal samples from 48 pig farms were collected in Beijing and Fuxin cities in 1999 and 2005, respectively. The concentrations of Cu were in the range of 6.86-395.19 mg/kg in the feed samples, and the mean values were in the order of weaner>grower-finisher>sow's feeds. The high concentrations over EU recommendations implied that excessive levels of Cu are fed on many pig farms in Beijing and Fuxin. Cu was also present in high concentrations in feces, and concentrations were highly variable. Cu concentrations in the feces from grower-finisher and weaner pigs were significantly greater than feces of sows. The super-intensive and small-scale farms had higher levels of Cu in feces than the middle farms. Cu concentrations in pig feces were approximately 5-times greater than in pig feeds. Feed management in grower-finisher pigs on super-intensive and small-scale pig farms is needed to reduce high Cu concentrations in feces and risks to soil contamination while feces are land-applied. © 2007 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.
出处	Journal of Environmental Sciences
卷	19 期:5 页:610-615
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24789]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Li Yan-Xia,Li Wei,Wu Juan,et al. Contribution of additives Cu to its accumulation in pig feces: study in Beijing and Fuxin of China. 2007.