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| Contribution of additives Cu to its accumulation in pig feces： study in Beijing and Fuxin of China | |
| 作者姓名： | LI Yan-xi LI Wei WU Juan XU Li-chao SU Qiu-hong XIONG Xiong |
| 作者单位： | [1]Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences,Beijing 100101, China [2]College of Food Science and Engineering, Shandong Agricultural University, Taian 271018, China [3]College of Resources and Environment, Southwest University, Chongqing 400716, China [4]College of Resources and Environment, Shandong Agricultural University, Taian 271018, China |
| 基金项目： | 国家重点基础研究发展计划(973计划) , the Pilot Project of Knowledge Innovative Project of Chinese Academy of Sciences , the Knowledge Innovation Project of the Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences |
| 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. |
| 关 键 词： | 北京 辽宁阜新 集约化生产 猪饲料 铜添加 猪粪 铜积累 |
| 收稿时间： | 2006-05-23 |
| 修稿时间： | 2006-08-24 |
Contribution of additives Cu to its accumulation in pig feces: study in Beijing and Fuxin of China |
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| LI Yan-xi,LI Wei,WU Juan,XU Li-chao,SU Qiu-hong,XIONG Xiong.Contribution of additives Cu to its accumulation in pig feces: study in Beijing and Fuxin of China[J].Journal of Environmental Sciences,2007,19(5):610-615. | |
| Authors: | LI Yan-xi LI Wei WU Juan XU Li-chao SU Qiu-hong and XIONG Xiong |
| Institution: | 1. Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2. College of Food Science and Engineering, Shandong Agricultural University, Taian 271018, China 3. College of Resources and Environment, Southwest University, Chongqing 400716, China 4. College of Resources and Environment, Shandong Agricultural University, Taian 271018, China |
| Abstract: | 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. |
| Keywords: | copper (Cu) pig feed pig feces intensive pig production feces accumulation additives Contribution Beijing management reduce risks soil contamination middle pigs sows variable high levels mean values order concentrations range |
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