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^: 16-1277 2019 N 5
^: .. ( ). - .-. , ; ..; ..; ..
^: - = Efficiency of compound ready-mixed feed concentrate and marl in the diets of highly productive lactating cows
^: . . / . . . -. . , . ., 2019; N 5(75). - . 51-55
^: 2019
^: . ..-.:.55
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^: - -, , , 30 , 11,9%, , -, 23,8%. . , 0,3 0,4% , . , , , . , , - 1748,25 . 47,1%, 2273,4 . 61,3% .

aref2 2 As a result of the studies of the diets of highly productive lactating cows, it was found that the average daily milk yield in the second experimental group, which received 30g of marl supplement to the main diet, the milk yield was 11.9% higher, and in the third one, with a partial replacement of wheat grain chop by the mixed feed concentrate, it was 23.8% higher. In the experimental groups, the qualitative indicators of milk were greater. So, the fat content in the second experimental group was 0.3 and in the third 0.4% higher than in the first group. These indicators are attributed to the nutrients intake, as they are more effectively used for the synthesis of protein and fat, especially in the third group of cows given feed concentrates in their diet. To assess the effectiveness of milk production in the summer period of the lactating cows taken additives in the diets increasing the balance of minerals and vitamins, a calculation of economic efficiency was carried out. It has been established that the second experimental group provides the profit 1 748.25 rubles or 47.1% higher and the third one - 2 273.4 rubles or 61.3% as regard to the control.

^TRN: 1875529
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