Influence of mixed ligand complex of сobalt on its metabolism in the organism of highly productive cows

O. V. Smetanina, I. I. Ibatulin, V. S. Bomko, L. G. Bomko, O. A. Kuzmenko

Abstract


In the scientific and economic research we investigated the influence different levels of mixed ligand complex of Cobalt on milk productivity and its exchange in the organism of highly productive cows of Ukrainian Black-and-White milk breed in combination with sulfates: Zinc 650 g/t, potassium 38 g/t, sodium selenite 1.8 g/t. For cows of the 1st control group, we administrated 8.9 g/t of cobalt sulfate, 2nd group – 9.7 g/t of mixed ligand complex of cobalt, 3rd, 4th and 5th experimental groups respectively, were fed into rations, g/t: 7.3; 4.9, and 2.4. As a result, the cows of the 1st control group and the 2nd experimental group the deficit in Cobalt was eliminated 100 % to the current norm, and for cows of the 3rd, 4th and 5th experimental groups - 75, 50 and 25 %.
The conducted researches have proved that the highest average daily milk yield of natural fat had cows of the 3rd experimental group, which consumed mixed fodder in the composition of mixed ligand complex of Cobalt in the amount of 75 % by concentration of the metal, which prevailed the analogues of the control group for this indicator, respectively, by 4.4 kg (р≤0.01), or by 9.7%. Cows of the 2nd, 4th and 5th experimental groups according to the average daily milk fat content of the natural fat were dominated by analogues of control, respectively, by 2.1 kg or 4.8 %; 3.2 kg or 7.1% (p≤0.05); and 1.3 kg, or 2.9 %. During the experiment, fat content of milk of cows of the 3rd experimental group exceeded fat content of milk of control group of cows by 0.03%, and in terms of milk, the 4% fat content milk yield was 3649.7 kg, which is 10.8 % (p≤0.01) higher yields of experimental cows in the control group. As for the content of protein in milk, there was no significant difference between the groups in this indicator. The use of sulfuric acid Cobalt in accordance with the recommended norm in the diet of experimental cows resulted in its positive balance in the body at 4.87 mg per head per day. And in the cows of the 2-5th experimental groups who ate this trace in the form of a mixed ligand complex the balance was, respectively, 8.19 % (p≤0.01), 10.07 (p≤0.01), 8.89 (p≤0.01), and 8.05 (p≤0.01).


Keywords


highly productive cows; diet; premix; microelements; sulfate of Zinc; potassium; sodium selenite; mixed ligand complex of cobalt; milk productivity; fat milk; cobalt exchange

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DOI: http://dx.doi.org/10.15421/2017_160

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