Effect of farm poultry genotype on product quality and consumer properties
The author analyzed the degree of influence of natural biologically active substances, which are part of feed additives from local plant resources, on the quality of products produced by laying hens of modern highly productive crosses with different genotypes. It has been established that the use of phytogenic feed additives in the diets of laying hens of various genotypes, consisting of 1 % flour of brown seaweed (kelp) and 2.0 % flour from local wild plants (common tansy, common yarrow, willow-herb angustifolia) contributes to the intensification of metabolic processes occurring in the body of all poultry genotypes: the digestibility of feed protein increased by 3.8-4.1 %; fat - 3.5-4.2 %; BEV - by 4.0-4.6 %; nitrogen use - by 4.3-5.7 % compared to the control indicators. The intensification of metabolic processes contributed to the improvement of the quality and consumer properties of products (eggs): the mass of eggs increased by 3.6-7.8 %; egg yolk weight - by 3.0-6.2 %; protein mass - by 4.3-6.3 %, which indicates an increase in the overall nutritional value of the egg. The biological value of the egg has increased: the fat content in the egg mass has increased by 2.5-5.5 %; protein - by 1.7-6.1 %; BEV - by 4.7-9.3 %; the concentration of carotenoids in the yolk of the egg - by 9.7-17.1 %. The thickness of the shell also increased and the yield of conditioned eggs increased. At the same time, the main zootechnical indicators of the productivity of poultry of all genotypes increased: the gross collection of eggs increased by 6.4-7.9 %; egg-laying intensity - by 6.0-7.8 %; egg mass yield - by 5.6-16.8 %. An increase in the productive indicators of poultry was reflected in an increase in feed conversion, so a decrease in feed costs for the production of 10 pcs. eggs amounted to 4.2-7.9 %; per 1 kg of egg mass - by 8.8-14.3 % to the control. As a result of the analysis of the obtained results, the author revealed that the most "responsive" genotype (cross) to the intake of biologically active substances that are part of the feed additive with the diet is the "Dekalb" cross, since the bird of this cross showed higher results in all studied indicators.