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The objective of the present researches was to evaluate the effect of the varied percentage of zinc and copper protein chelate in a dietary unit on the chosen haematological, biochemical and productive parameters of cows. The experimental factor was the kind of zinc and copper compound in a supplementary mixture where 25% or 50% of zinc and copper in the form of sulfates was replaced with organic...
Examinations were carried out on 12 clinically normal Polish ponies at the mean age of 7 years and body weight 380-410 kg at mating season (3 months) in April-June. Six stallions received СаСОз (experimental group) for 30 days, six non-treated ones served as a control. Both experimental and control animals were fed identical natural fodder. A diet composed of 2 kg of bruised oat and 5 kg of hay contained...
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