| Popis: |
Currently, much attention is paid to various groups of bacterial cultures that are used in poultry farming in the form of mono-additives or in combination with biologically active substances. The purpose of the research was to compare the productivity of rearing of replacement chicks and laying hens of the parental herd and the use of probiotic feed additives Levisel SB Plus and Cellobacterin-T in their diet. The researches have been performed under conditions LLC “Ravis – poultry farm Sosnovskaya” in the Troitsky district in the Chelyabinsk region on the cross of poultry “ISA-Hubbard-F15”. The research has made it possible to expand the theoretical understanding of the periodic use of probiotic feed additives in the diet of egg productivity poultry. The addition of probiotics with their periodic inclusion in the diet has a positive infl uence on the egg production of poultry throughout the productive cycle with a noticeable superiority of Cellobacterin-T over Levisel SB Plus. The inclusion of the probiotic Cellobacterin-T in the diet of replacement chicks and laying hens at a dosage of 0,50 kg/t of complete feed allows us to enhance the homogeneity of the group in the period of rearing of replacement chicks, and its inclusion in the diet of laying hens has increased egg production by 9,2 %, the hatching rate by 2,2 %, the livability of poultry by 1,9 %, profi tability of production 7,6 %. Therefore, it is economically advantageous to use probiotic feed additives in the diet of laying hens of the parental herd not during the entire productive cycle, but during the most stressful periods associated with preparing the poultry for egg laying, at peak and when it decreases. |
