Features of feeding and productive potential of bulls in different periods of use

An urgent task in the technology of growing sires is balanced feeding. When evaluating thecomposition of diets for farm animals, and, in particular, for breeding bulls, it is necessary to payattention to the presence of the optimal amount of nutrients in the feed. However, under the conditionsof modern requirements, including for obtaining high-quality genetic material, specialized feeding isrequired. The aim of the research was a comparative evaluation of sires of different periods of use,depending on the feeding ration. The experimental part of the work was carried out on the farm of JSC"Orlovskoe" for breeding work. The object of the study were sires of black-and-white breed. For thebulls of the experimental group, the nutritional ration was detailed during the periods of use: during thenon-random period, when the bulls were in the rest phase, and during the period of increased load (2-3 cages per week) per head. It was found that the animals of the experimental group ate food betterthan the control group. Quantitative indicators of seed selection differ slightly between groups. 31.4ejaculates were selected in the control group and 30.2 in the experimental group, of which 1 marriagewas detected in both groups. Ejaculate activity in animals of the control group is 0.8 points higher thanthat of the experimental group. Semen loss in both groups was the same. Sperm concentration in 1ml. in the control group is higher than in the experimental group by 2.7%. Sperm motility in theexperimental group is lower by 0.4% than in the control group. The economic efficiency of feedingbulls for the period of experience in the difference with the control of cumulative sperm doses, taking into account the culled ones, was 6%. From the results obtained, it was concluded that changing thediet during the experiment had practically no effect on the quality and quantity of the seed. The bulls ofthe experimental group were in good factory conditions.