Abstract
Due to the reduction of sources of traditional natural fodder in animal husbandry, it becomes relevant to use non-traditional feed components, in particular the pine, which has a positive effect on growth and development of calves, provides them with
 carotene, increases the average daily live weight gain, reduces feed costs per unit of weight gain and thereby improves the economic efficiency of fattening. The purpose of our research was to study the effectiveness of phyto additive produced by LLC STC
 “Khiminvest” in feeding calves. It was found that its use in the diets of animals aged 3-6 months had a positive effect on the physiological state of the animals, which provided an increase in gross live weight gain by 11.3-15.5 % with a decrease in EFU
 cost to obtain it by 10.3-13.3 %. The most effective scheme of feeding phyto additive to calves was 400 mg per 1 kg of live weight.
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