Effect of the application of bioplexes of zinc, copper and manganese on milk quality and composition of milk and colostrum and some indices of the blood metabolic profile of cows
2007
Kinal, S.,Agricultural Univ. of Wroclaw (Poland). Dept. of Animal Nutrition and Feed Quality | Korniewicz, A.,Agricultural Univ. of Wroclaw (Poland). Dept. of Animal Nutrition and Feed Quality | Slupczynska, M.,Agricultural Univ. of Wroclaw (Poland). Dept. of Animal Nutrition and Feed Quality | Bodarski, R.,Agricultural Univ. of Wroclaw (Poland). Dept. of Animal Nutrition and Feed Quality | Korniewicz, D.,Agricultural Univ. of Wroclaw (Poland). Dept. of Animal Nutrition and Feed Quality | Cermak, B.,Jihoceska Univ., Ceske Budejovice (Czech Republic). Katedra Genetiky, Slechteni a Vyzivy Zvirat
Inorganic and organic forms of zinc, copper and manganese were applied in mineral mixtures to 90 dairy cows with average milk yield of about 9,500 kg in previous lactations. Mineral mixtures were fed for 6 weeks before calving and during the first three months of lactation. The application of microelements as bioplexes in amounts covering 30% of daily requirements had a positive effect on the increase in colostrum dry matter content from 20.9 to 23.35% as well as on the concentrations of protein, fat, Ca, P, Zn and Cu. There were no differences in milk levels of minerals during the 2nd and 3rd months of lactation. However, Ca and P concentrations in blood serum increased from 1.96 to 2.14 g/kg and from 1.76 to 2.22 g/kg, respectively, in the first trimester of lactation.
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