No abstract

The mineral elements contained in poultry feed do not fully meet their needs. Therefore, the elements that are lacking in the diet are introduced into the feed or feed mixtures to ensure mineral integrity. The aim of the experiment was to research the cobalt chelate complex effect on live weight, weight gain, slaughter quality and hematological parameters of Pharaoh quails.Scientific studies of the cobalt chelate complex effect on quail productivity were conducted on a research farm of Vinnytsia National Agrarian University. Two 20-bird groups were formed on the principle of analogues. The experiment lasted for 42 days, i.e., equalization period lasted for five days, and the main period lasted for 37 days.Control slaughter was performed at the end of the experiment, four heads from each group were slaughtered to determine the main indicators of slaughter and blood. The quails additionally fed by the cobalt chelate complex outnumbered their control counterparts in life weight, i.e., females by 8.5 % (P ≥ 0.001) and males by 7.9 % (P ≥ 0.001).Feeding supplements increases the absolute increase by 8.5 % (P ≥ 0.001) in female quails and by 8.1 % (P ≥ 0.001) in male quails of group II than in the control group.Due to the action of the cobalt chelate complex in group ІІ, feed consumption per 1 kg of growth is reduced in females by 6.62 % and males by 6.12 % relative to control counterparts.In group ІІ, the pre-slaughter live weight of quails increased by 7.7 % (P ≥ 0.05), the gutted carcass increased by 8.1 % (P ≥ 0.05) and the gizzard weight increased by 7.8 % (P ≥ 0.05) than the control indicator.The cobalt chelate complexapplication increases the weight of the breast by 12.1 % (P ≥ 0.01) and thigh by 14.3 % (P ≥ 0.05) in group II relative to control analogues. In group II quails of the amount of hemoglobin increases by 7.2 % (P ≥ 0.05) under the action of the researched supplement in comparison with the control sample.

In the feed industry raw material, grinding is an integral part of the production cycle. However, this process is characterized by significant energy consumption – from 3 to 100 kW * hour per ton of finished goods, and only a part of it is directly spent on grinding. Therefore, this scientific research is aimed at minimizing the consumption of energy resources by technological machines – crushers and improving the energy efficiency of the process in general is an urgent issue. A powerful modern research method of studying complex objects is system analysis, which enables to modernize existing machines and design new ones without conducting a large number of expensive physical experiments. Unfortunately, this method is not yet widely used in the research and design of new machines for processing agricultural products, since there are no developed and substantiated engineering theories describing the behaviour of the processed material in the workspace of the technological machine. Grinding grain with a moisture content indicator at the level higher than the base condition, there is a low efficiency of the method of impact grinding, that is determined by the increased plasticity of the material and an increase in the value of the marginal deformation, which can lead the grain towards destruction. A partial solution of this problem is possible when combining the method of cutting and hammering, which has formed the basis of a technical solution implemented in the scientific laboratory of Vinnytsia National Agrarian University, where the design has been developed and experimental verification of the vibrating crusher have been carried out. Further improvement of the energy efficiency of the technological operation of grain grinding requires theoretical researches of the dynamics of the process, and determining the minimum amount of energy required for destruction. The article deals with the laws of solid mechanics and the use of rheological methods in researching disperse systems, it presents the values of absolute deformation and the work that is carried out during the destruction of maize grain under the influence of applied impact-cutting load in analytical and graphic form. Moreover, the results of this research help us to establish the marginal values of plastic and elastic absolute deformations occurring in the material, which is a prerequisite for the theoretical substantiation of the grinding law.

<b>The aim of the experiment was to research the productivity, slaughter qualities and broiler chicken meat quality using a probiotic feed supplement. The research objectives were solved experimentally using zootechnical and statistical research methods. It was found that the probiotics application in the feeding of broiler chickens increased live weight by 11.9%, the average daily gain was higher by 12.1%, absolute by 12.2% and reduced feed consumption per 1 kg increase by 8.9% compared with control. Additional consumption of probiotic feed supplement by broiler chickens increases the pre-slaughter live weight by 12.0%, the weight of ungutted carcass by 12.1%, semi-gutted carcass by 9.9% and gutted carcass by 13.3% relative to control. Consumption of probiotics by broilers increased the level of total moisture by 1.3% in the pectoral muscles, and hygro-moisture was higher by 0.2% in the thigh muscles; the amount of nitrogen was higher by 0.2% compared to the control group.

The research is based on the tasks of applied research on the topic: «Development of a complex of energy-efficient and resource-saving equipment and promising technologies for feeding farm animals of the AIC of Ukraine», state registration number 0121U108589. The authors’ research is aimed at solving current problems of technological renewal and development of the agro-industrial complex of Ukraine.The mechanism of action of probiotics is that they interfere with the development of pathogenic microflora, and can also synthesize biologically active substances (BAS – vitamins, amino acids, enzymes), while increasing digestibility and nutrient utilization. Probiotic microorganisms create a physical barrier between the cells of the intestinal epithelium and its contents. In addition, probiotic bacteria produce short-chain fatty acids, which leads to lower pH levels.In the conditions of the scientific farm of the Faculty of Technology of Production and Processing of Livestock and Veterinary Products of Vinnytsia National Agar University, research was conducted on the use of probiotic feed additives of natural origin in feeding broiler chickens. Rational use of biologically active substances in animal feed makes it possible to significantly increase the rate of absorption of feed nutrients, productivity and conservation of poultry. The article presents the results of research on the use of feed additives of natural origin in the feeding of broiler chickens. Broiler chickens, compound feed, meat, and blood were used as the object of the study. It has been established that the probiotic in the compound feed has a positive effect on the intensity of growth by increasing the digestibility of the main nutrients of the feed. It was found that the additive under study improves the quality of poultry meat due to the higher content of essential amino acids. New data have been obtained on the effect of feed additives on the availability of amino acids and the retention of mineral elements. For the first time, the dependence of physicochemical parameters, amino acid, fatty acid and mineral composition of the pectoral and femoral muscles on the ratio of different doses of the probiotic was found. An increase in the slaughter rates of broiler chickens under the action of a probiotic supplement has been established. The influence of the studied additive on the morphological, biochemical parameters of poultry blood was studied. Studies have shown a positive effect on the productivity, growth and quality of broiler meat.