The research was carried out in the conditions of the farm of FGUP RPZ "Krasnoarmeysky" named after A. I. Maistrenko of the Krasnoarmeysky district of the Krasnodar territory. The aim of the research was to develop elements of technology of intensive beef production when raising dairy bulls up to 12 months of age with the inclusion of starter feed in the diet and drinking different amounts of dairy feed in the first 5 months of life. For the experiment, black-andwhite bulls were selected from the age of 4 days, divided into 2 groups of 12 heads each. Bulls, which in the first five-month period of life replaced half of the dairy feed with starter feed and other feeds, showed increased growth and development of the gastrointestinal tract and other organs in the subsequent 6-12 month period of cultivation and fattening, they had an increased energy of average daily growth of 1142.8 g, surpassing the animals of the 1st group. In the first 5-month period of growing, the limited replacement of part of the dairy feed with mixed feed starter, abstinence with the supply of coarse feed in the first two months of life had a positive effect on the development of the gastrointestinal tract, heart, lungs, tongue and head, as well as the intensity of growth, compared to analogues that received milk and hay. After the milk period of 6-12 months of growth and development, the positive effect of pre-enhanced development of organs (including the pre-ventricles) continued. Differences in the growing of calves in the first 5 months had an impact on the histological state of the tissues of the scar, mesh and abomasum, which also affected the differences in the growth rate of calves-analogues.
Research has been carried out on the intensive production of beef when raising dairy bulls up to 12 months of age drinking mainly dairy feed in the first 5 months of life (in group 1) and with the inclusion of a starter compound feed in the diet (in group 2). Different types of bull calves rearing in the first 5 months of life led to significant differences in the growth and development of the whole organism and all its individual organs and tissues, mainly in favour of bull calves raised with replacing part of the milk with vegetable feed, and subsequently had a decisive influence in the period from 6 up to 12 months of their life with the same type of feeding and maintenance. It has been established that the rearing system with a decrease in the drinking of whole milk and abstinence of the supply of roughage for the first 2 months of life, promotes the the growth of animals for a twelve-month period of life, leads to an increase in the yield of veal and beef meat, a decrease in feed consumption per unit of weight gain, and increasing the profitability of production by 8-9%, therefore it is recommended for production.
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