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Levels of Pb and Cd in Single Feeding Stuffs and Compound Feeds for Poultry

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Abstract

The assessment of heavy metals in feeds for food-producing animals is of particular importance both for animal and human health. Single feeds can be mixed and offered to animals either crushed or pelleted, and it would be recommendable to assess heavy metal content before mixing. A total of 408 feed samples for poultry were sent to our laboratory by farmers and feed manufacturers from Germany. Single feeding stuffs (cereals and legume seeds, n = 109 and n = 86, respectively) and compound mixed feeds for laying hens (n = 63), broilers (n = 83) and turkeys (n = 67) in the years 2015 to 2018 were processed for Pb and Cd content. Analyses pointed to the lowest Pb contents in cereal feeds (0.031 and 0.101 mg/kg feed). In compound feeds, values ranged between 0.089 (broilers) and 0.181 mg/kg on an as fed basis (laying hens). The highest Pb content of 0.358 mg/kg (as fed) was determined in one sample of mixed feed for turkeys. Cd levels in cereal feeds and compound feeds were similar; Cd in legume seeds turned out to be slightly higher (0.089 mg/kg feed). Results point to differences between cereals and legume seeds as single feeds; however, safe levels were found for both, as well as for compound feeds, below the maximum permitted for Pb 10 mg/kg and Cd 1 mg/kg in feed dry matter (88%).

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Acknowledgements

Authors are grateful to laboratory staff.

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  1. University of Rostock, Justus-von-Liebig-Weg 6b, 18059, Rostock, Germany

    Petra Wolf

  2. Department of Veterinary Medicine, University of Sassari, via Vienna no. 2, 07100, Sassari, Italy

    Maria Grazia Cappai

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  1. Petra Wolf
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Wolf, P., Cappai, M.G. Levels of Pb and Cd in Single Feeding Stuffs and Compound Feeds for Poultry. Biol Trace Elem Res 199, 1074–1079 (2021). https://doi.org/10.1007/s12011-020-02197-6

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