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EFFECT OF DRY PERIOD DURATION ON DYNAMICS OF CHANGES IN QUANTITATIVE AND QUALITATIVE INDICATORS OF DAIRY PERFORMANCE OF FULL AGE COWS

Abstract

The paper presents the results of studying changes in dairy performance of Ukrainian brown dairy cows depending on dry period duration. It has been determined that the lowest indicators of dairy performance were shown by cows with dry period of up to 55 days, and the maximum - 66-75 days. In terms of milk yield, cows with dry period of 66-75 days had an advantage over animals with dry period of up to 55 days by 760 kg (19.53%), in terms of fat level - by 0.31%, in terms of milk fat - by 44 kg (30.13%), in terms of protein level - by 0.11%, in terms of protein amount - by 29 kg (23.78%), in terms of total fat and protein - by 70 kg (25.83%). Cows with dry period over 76 days showed decline of quantitative and qualitative indicators of dairy performance. Thus, the optimal dry period duration for cows of Ukrainian brown dairy breed at Kolos breeding farm made 66-75 days.

For citations:


Prikhodko N.F. EFFECT OF DRY PERIOD DURATION ON DYNAMICS OF CHANGES IN QUANTITATIVE AND QUALITATIVE INDICATORS OF DAIRY PERFORMANCE OF FULL AGE COWS. Zootechnical Science of Belarus. 2020;55(2):289-295. (In Russ.)

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ISSN 0134-9732 (Print)