Abstract
In order to increase the efficiency of the biological link of biomachinery systems used in dairy cattle breeding, an algorithm for managing the quality of animal feeding is developed. The optimal structures of typical rations intended for feeding animals used in modern biomachinery systems are proposed. They use high quality forages for cows with a live weight of 600 kg and daily milk yield of 20 and 30 kg. For this purpose the most preferable are haylage and hay from alfalfa of 1 class, corn silage of 1 class, as well as high quality "address" mixed fodder, dry cake and beet molasses. An experimental sample of feed additive of the following composition, in % by weight: thistle seed - 92,76; probiotic "profort" - 6,00; betaine hydrochloride (97%) - 1,20; vitamin E (50%) - 0,04 (the activity of the preparation is indicated in brackets). The use of this feed additive in the diet of highly productive dry cows in the amount of 0.4 kg per day per head increases the milk productivity of animals by 4.3%. The use of this feed additive contributed to the reduction of time for separation of the afterbirth in comparison with control animals by 2.4 hours. Animals from the group that received the feed additive were characterised by better reproductive ability. After 44 days they were inseminated after calving, while the control group were inseminated after 79 days, or 35 days later.
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