Аграрный вестник Урала № 01 (180) 2019Биология и биотехнологии
INCREASE OF GENETIC POTENTIAL OF HIGH-PRODUCTIVE COWS BY USING IN ENERGY SUPPLEMENT RATIONS
In order toincrease the genetic potential of highly productive cows, we carried out scientificand economic experience on the use of energy feed additives in their diets. Itwas established that feeding the cows, in the first 100 days of lactation, theenergy feed supplement “Lacto C” in the amount of 200 g/head/day increasedtheir milk production by 8,88 % (P < 0,05), the level of fatand protein in milk – by 0,11 % and 0,09 % compared with analogues ofthe control group. The inclusion in the diet of cows energy feed additives theperiod of milking had a positive effect on the chemical composition of milk.Thus, the energy value of 100 grams of milk obtained from cows 1 of the experimentalgroup was 2,96 MJ, which is more than the same indicator of the control group’speers by 0,07 MJ (2,42 %) and analogs 2 of the experimental group by 0,05MJ (1,73 %) accordingly. High milk production did not adversely affect thereproductive function of cows. Thus, the service period of cows 1 of theexperimental group was 9 days shorter compared with the control group and 5days compared with 2 experimental groups. At the same time, the intercalvingperiod in cows 1 of the experimental group was 411 days, which is 15 and 7 daysshorter than in animals of the control and 2 experimental groups, respectively.The duration of the dry period in experimental animals was within the limits ofacceptable values, while in cows 1 of the experimental group, this indicatorwas 64 days, which is 7 and 3 days shorter compared to the control and 2experimental groups, respectively. Feeding the basal feed energy additive “LactoC” in the amount of 200 g/head/day reduced the cost of milk production by 2,70 %and increased profitability by 9,80 % compared with the control group.
black-and-white cows, Lacto C and Extima 100 energy additives, milk production, milk chemical composition, reproductive capacity, economic indicators.
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