V. Bomko, Doctor of Agrarian Sciences
V. Danylenko, PhD (Agrarian Sciences)
Bila Tserkva National Agrarian University
This article highlights the data showing the different levels of efficiency of mixed lygand Zinc complex to obtain clean milk from highly productive Holstein cows from Germany. Tested cows were fed during the experiment with small component forage mixture composed of concentrated feed-sulfate salts of copper, cobalt, manganese, sodium selenite, forage mixture to complement these micronutrients to normal, and selenium concentration which was adjusted to 0. 3 mg / kg dry matter intake and depending on the circuit experiment, to different doses of mixed lygand Zinc complex. Control Holstein cows were Hungarian, in compound feed, concentrates which was mixed lygand complex of zinc, zinc deficiency is covered by 50%. Cows from the research groups from Germany – zinc deficiency covered 85, 70, 55 and 40% by mixed lygand Zinc Complex
Based on data obtained during the scientific and economic experiment, it was found that the elimination of zinc deficiency in the forage mixture of 70% by mixed lygand complex of zinc in the diets of dairy cows from the breed ‘Holstein’ from Germany in the dry period and the first 100 days of lactation, provided that one insemination each cow in the 1st control group it took 2,3 fertilization in the 2nd-0 2. 2; 3rd – 1. 5; 4th – 1. 9 and 5th – 2. 1 and reduce the length of service period. Thus, in the the cows from the 1st control group this period lasted in the average of 89. 2 days in the 2nd – 78. 6; in 3rd – 75. 4; 4 th -84. 6 and -95. 5 5 days, which in percentage terms compared with the animals of the 1st control group, except for the 5th research group at: 11. 88 in 2- and, 15. 47 in the 3rd and 5. 16 in the 4th, and 5 more at 7. 06.
Based on data obtained during the scientific and economic experiment it was proved that genetic potential of highly productive cows of Holstein breed of German selection in forest-steppe zone of Ukraine is best realized to the elimination of zinc deficiency by 70% through the use of mixed lygand complex of this element.
Key words: highly productive cows, reproductive ability, premix, trace elements, chelates, sulfate salts trace elements of copper, cobalt, manganese, mixed legand complex of Zink.