TY - JOUR AU - V. P. Danilenko AU - V. S. Bomko PY - 2016/04/10 Y2 - 2024/03/29 TI - EFFECT OF MIXED LYGAND COMPLEX OF ZINC ON MILK PRODUCTIVITY IN HIGHLY PRODUCTIVE COWS OF HOLSTEIN BREED GERMAN SELECTION JF - Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series: Agricultural sciences JA - nvlveta VL - 18 IS - 1 SE - Producing of feedstuffs, nourishment, selection and animal breeding DO - UR - https://nvlvet.com.ua/index.php/agriculture/article/view/3496 AB - The article highlights data of different levels of efficiency mixed lygand complex of Zinc to obtain clean milk from highly productive Holstein cows of German selection. Tested cows were fed with small component forage mixture that were composed with concentrated feed–sulfate salts of copper, cobalt, manganese, sodium selenite, forage mixture complemented these micronutrients to normal, and selenium concentration was adjusted to 0,3 mg / kg of dry matter and depending on various schemes of experiment levels of mixed lygand complex of Zink. Control Holstein cows were Hungarian selection in compound feed, concentrates which was mixed lygand complex of Zinc, zinc deficiency was covered by 50 %. Cows from research groups of German selection Zinc deficiency covered 85, 70, 55 and 40 % by mixed lygand complex of Zinc. Based on data obtained during the scientific and economic experiment, found that Zinc deficiency liquidation in forage mixture of 70 % by mixed lygand complex of Zinc in the diet of dairy cows of German Holstein breed in dry period and the first 100 days of lactation, cows provided 3d research group of this element and contributed to obtaining the highest productivity compared with the control group, the 2nd, the 4th and the 5th tested groups average daily milk yield in cows from the 3rd experimental group was 54,3 kg and average daily milk yield superior natural milk cows from the 1st control group to 13,62 %, 2nd research group at – 7,04 % ,4th research group to – 4,46 % and 5th research group at – 7,8 % in the fat content of milk in the 1st control group –3,54 %, 2nd – 3,55 %, 3rd – 3,59 %, 4th –3,57 % and 5th – 3,58 %. Gross milk yield per cow of 4 percent milk fat by the first 100 days of lactation was: in the 1st control group – 4778 kg, 2nd experimental – 5072 kg, 3rd – 5429 kg, 4th – 5197 kg and 5th – 5036 kg. Based on data obtained during the scientific and economic experiment proved that the best realized genetic potential highly productive cows of Holstein breed German selection in forest–steppe zone of Ukraine to the elimination of zinc deficiency by 70 % through the use of mixed lygand complex of this element. ER -