Heavy Metal Content in the Compound Feed and Eggs of Laying Hens of Sichuan Province

YUAN Zehong; HUANG Xuanyang; ZHANG Keying; DING Xuemei; ZENG Qiufeng; BAI Shiping; LUO Yuheng; WANG Jianping

doi:10.3969/j.issn.1006-267x.2015.11.020

Chinese Journal of Animal Nutrition >

2015 , Vol. 27 >Issue 11: 3485 - 3494

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.11.020

FEED SECURITY

Heavy Metal Content in the Compound Feed and Eggs of Laying Hens of Sichuan Province

YUAN Zehong ,
HUANG Xuanyang ,
ZHANG Keying ,
DING Xuemei ,
ZENG Qiufeng ,
BAI Shiping ,
LUO Yuheng ,
WANG Jianping

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Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, China

Received date: 2015-06-10

Online published: 2015-11-21

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Abstract

Compound feeds of laying hen and eggs run a risk of heavy metals pollution, which is a potential hazard to animal health and safety of animal products. A total of 35 compound feeds at different periods (18 kinds of laying peak period, 11 kinds of brood incubation period, and 6 kinds of pre-peak laying period) sourced from 11 different feed companies and 4 large commercial farms and 11 brands of eggs in Sichuan province were sampled to investigate the status and potential hazards of the 13 common heavy metal elements. The contents of manganese (Mn), copper (Cu), zinc (Zn), vanadium (V), cobalt (Co), nickel (Ni), arsenic (As), selenium (Se), molybdenum (Mo), cadmium (Cd), mercury (Hg), and lead (Pb) were determined using inductively coupled plasma mass spectrometry (ICP-MS). The results showed as follows:the distributions of the heavy metals in the samples were not in equilibrium, and they didn't obey the normal distribution. The average concentration of Cr and Pb in compound feeds of laying peak and brood incubation periods were 5.61 and 2.74 mg/kg, respectively, which were under the limits standard (10 and 5 mg/kg), but some companies' feeds were observed to exceed the limits standard at 11.1% and 18.2%. The contents of As, Cd, Hg in other feeds did not exceed the National Hygienic Standard for Feeds. In addition, the average level of V in compound feeds of laying peak period was 1.74 mg/kg, whereas the maximum detection value was 5.2 mg/kg, which beyond the tolerated level of vanadium in the feed as suggested by United States standard (5 mg/kg), and the over standard rate of V was 5.6%. However, the standard of the National Hygienic Standard for Feeds did not set its limits. Moreover, the detection of heavy metals in eggs had not been found to exceed the standard. In summary, the heavy metal content of different layer's feeds and different brands of eggs in Sichuan is differed at large scale. Cr and Pb are shown to exceed its limits levels in some companies feed in current survey. In addition, the potential risk of heavy metal V in laying hen diets with high content, and there is no limited domestic standards, which should pay attention to in future.

Key words： compound feed; ICP-MS; heavy metals; vanadium; egg

Cite this article

YUAN Zehong , HUANG Xuanyang , ZHANG Keying , DING Xuemei , ZENG Qiufeng , BAI Shiping , LUO Yuheng , WANG Jianping . Heavy Metal Content in the Compound Feed and Eggs of Laying Hens of Sichuan Province[J]. Chinese Journal of Animal Nutrition, 2015 , 27(11) : 3485 -3494 . DOI: 10.3969/j.issn.1006-267x.2015.11.020

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