| 动物饲料中砷、铜和锌调查及分析 |
| 摘要点击 2362 全文点击 1249 投稿时间：2012-04-08 修订日期：2012-05-07 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 饲料 有机胂添加剂 砷 铜 锌 |
| 英文关键词 animal feed organoarsenical additive arsenic copper zinc |
| 作者 | 单位 | E-mail | | 姚丽贤 | 广东省农业科学院土壤肥料研究所,农业部南方植物营养与肥料重点实验室,广东省养分资源循环利用与耕地保育重点实验室, 广州 510640 | lyaolx@yahoo.com.cn | | 黄连喜 | 广东省农业科学院土壤肥料研究所,农业部南方植物营养与肥料重点实验室,广东省养分资源循环利用与耕地保育重点实验室, 广州 510640 | | | 蒋宗勇 | 广东省农业科学院,广州 510640 | | | 何兆桓 | 广东省农业科学院土壤肥料研究所,农业部南方植物营养与肥料重点实验室,广东省养分资源循环利用与耕地保育重点实验室, 广州 510640 | | | 周昌敏 | 广东省农业科学院土壤肥料研究所,农业部南方植物营养与肥料重点实验室,广东省养分资源循环利用与耕地保育重点实验室, 广州 510640 | | | 李国良 | 广东省农业科学院土壤肥料研究所,农业部南方植物营养与肥料重点实验室,广东省养分资源循环利用与耕地保育重点实验室, 广州 510640 | |
|
| 中文摘要 |
| 在广东省采集市售鸡、猪配合饲料样本70个和76个,调查评价其中砷、铜、锌形态和含量,并考察常用有机胂添加剂洛克沙胂(ROX)的稳定性.结果表明,鸡、猪料平均总As含量分别为3.6 mg·kg-1和6.5 mg·kg-1,总Cu含量为18.2 mg·kg-1和119.4 mg·kg-1,总Zn含量为124.6 mg·kg-1和486.2 mg·kg-1.按照国家相关限量标准,如考虑到可能添加了有机胂,饲料总As超标现象较少,猪料Cu、Zn超标现象较为普遍.Zn、Cu、As在饲料中添加量较高成为它们在禽畜粪中残留较高的根本原因.另外,有25.4%的饲料样本检出有机胂,且普遍同时含有As(Ⅲ)和As(Ⅴ)杂质.检出ROX和阿散酸(p-ASA)含量平均分别为7.0 mg·kg-1和21.2 mg·kg-1.鸡、猪料中各有24.3%和26.3%的样本检出有机胂.鸡料中常用ROX,而猪料常用p-ASA.ROX及其无机砷杂质在添加剂和饲料中均在室温至少30 d内保持形态稳定,说明饲料中较高含量的无机砷杂质很可能源自有机胂添加剂中的砷杂质.对相关从业人员而言,这是一种新的砷暴露途径. |
| 英文摘要 |
| Seventy chicken and seventy-six pig feeds were collected from the feed stores in Guangdong province, and the species and concentrations of As, Cu and Zn were determined. We also examined the stability of roxarsone (ROX), one of the most widely used organoarsenical additives, either in the additive or in the feed at room temperature. The results showed that, averagely, the chicken and pig feeds contained 3.6 and 6.5 mg·kg-1(As),18.2 and 119.4 mg·kg-1(Cu),and 124.6 and 486.2 mg·kg-1(Zn), respectively. The excessive dosages of As, Cu and As in animal feeds will lead to higher residue of As, Cu and Zn in animal manures. Based on the national limit criteria for feed or feed additive, it was supposed that organoarsenicals had been used, only few feed samples exceeded the As limit, however, the excessive Cu and Zn in pig feeds were much more common. Organoarsenicals were found in 25.4% of the total feed samples, and As(Ⅲ) and As(Ⅴ) were the two most commonly detected As impurities in feeds bearing organoarsenicals. The mean detectable ROX and arsenilic acid were 7.0 and 21.2 mg·kg-1, respectively. Organoarsenicals were detectable in 24.3% of the chicken feed samples and 26.3% of the pig feed samples. Moreover, ROX was commonly used in chicken feeds, while p-ASA in pig feeds. ROX and the inorganic As impurities, either in the commercial additive or in the feed, remained stable for at least 30 days at room temperature, indicating the higher As impurities in feeds probably originated from the As impurities in organoarsenical additives. This is a new As exposure pathway for the producer and user of organoarsenicals and feeds amending organoarsenicals. |
|
|
|
