The economic efficiency of the use of mixed ligand complexes of Zinc, Manganese and Cobalt in the rations of highlyproductive cows of the Ukrain-ian Red-Spotted Dairy breed

Abstract

The article deals with the results of research on the economic efficiency of the use of mixed ligand complexes of Zinc, Manganese and Cobalt in the feeding rations of highlyproductive cows of Ukrainian Red-Spotted Dairy breed in the first 100 days of lactation. The research was performed on five groups (one control and four experimental) of analogous cows in the conditions of ALC “Terezyne” Bila Tserkva district of Kyiv region. The control was the optimal dose of mixed ligand complexes of Zinc, Manganese and Cobalt, which was previously established with a concentration of 1 kg of dry matter (DM) of the feed mixture (FM), mg: Zinc – 60.8; Manganese – 60.8 and Cobalt – 0.78. For the 2nd experimental group, the concentration of these trace elements was increased by 10 %, and in the 3rd, 4th and 5th experimental groups – on the contrary, the concentration of Zinc, Manganese and Cobalt in 1 kg of DM of feed mixture was reduced by 10 %, 20 and 30 %, respectively, compared with the control. The best results on milk yield of natural and basic fat content were got from cows of the 4th experimental group, where the concentration of Zinc, Manganese and Cobalt due to their mixed ligand complexes in 1 kg of DM of feed mixture was, mg: Zinc – 48.6; Manganese – 48.6; Cobalt – 0.62. The cost of products got from experimental cows ranged from UAH 12702.3 up to UAH 13783.7 and it was the highest in the 4th experimental group. It was set up that for cows of Ukrainian Red-Spotted Dairy breed in the first 100 days of lactation the most economically advantageous was the dose of mixed ligand complexes, in which the concentration of Zinc and Manganese was 48.6 mg, and Cobalt – 0.62 mg/kg DM, which allowed to obtain a profit of 14.37 % more than in the control group. Doses of mixed ligand complexes with a concentration of Zinc and Manganese – 66.9 mg; 54.7 and 42.6 mg, and Cobalt – 0.86 mg; 0.7 and 0.55 mg/kg CF gave a much lower economic effect. Additional profit in the 2nd experimental group amounted to UAH 66.8 or 1.34 %; in the 3rd – UAH 95.6 or 1.92 % and in the 5th – UAH 561.6 or 11.28 %, compared with the control group.