Dietary effects of zinc , copper and manganese chelates and sulphates on dairy cows

@inproceedings{Kinal2005DietaryEO,
  title={Dietary effects of zinc , copper and manganese chelates and sulphates on dairy cows},
  author={Stefania Kinal and Adolf Korniewicz and Dorota Jamroz and R. Zieminski and Maja Slupczynska},
  year={2005}
}
The experiment was carried out on 90 dairy cows in the period from 6 weeks before calving up to 305th day of lactation. The animals randomly divided into 3 groups were fed with diets containing different chemical forms of zinc, manganese and copper applied in mineral mixtures. The control group received these trace elements as sulphates, but in experimental groups 20 or 30% of daily needs were covered by chelated forms. Cows receiving 30% of needed Zn and Mn (each 315 mg/day) and Cu (63 mg/day… CONTINUE READING
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