Activity of hydrolytic enzyme in the poultry of different species

Keywords: chickens, quails, ducks, proteolytic , amylolytic and lipolytic activity


In the processes of digestion and assimilation of nutrients of feed in the body a special place belongs to the digestive system. Hydrolysis of nutrients in the gastrointestinal tract of farm poultry is closely linked to its physiological state, the intensity of metabolic processes in the body and its productivity. However, there are no significant differences in the course and regulation of digestive functions between individual poultry species. At the same time, for different types of poultry, certain distinctive patterns of the course of digestive processes and, in particular, the activity of hydrolytic enzymes, due to the peculiarities of the structure and functioning of the digestive system, are characteristic. In the article is given a fragment of complex systemic researches, which is concerning the proteolytic, amylolytic and lipolytic activity of enzymes in tissues of the organs of the digestive canal (mucous membrane of the glandular and duodenum, pancreas, liver) of the quail breed “Pharaoh”, as well as chicken egg productivity direction cross “Hayseks Brown” and the Beijing Broiler Duck Cross STAR 53 (heavy) selection of the French firm “GRIMAUD FRERES SELECTION” during the critical periods of their growth and development. Namely, in the period of adaptation of the organism after hatching (day-old chicks of all species), complete resorption of residual yolk (7-day quail and 6-day chickens and ducks) and puberty (120-day chickens, 42-day quails, 180-daily ducks) All poultry was kept in poultry farms and received balanced full-fodder feeds, taking into account its species, age and physiological condition. The technology of keeping quails and chickens in cellular batteries, and ducks – on the mesh floor, with free access to the feed and water. It was established, that the nature of changes in the activity of hydrolytic enzymes had organ-tissue and species specificity. This is due not only to the particularities of digestion in quails, chickens and ducks, but also the energy value of rations used in feeding each type of farm poultry, which significantly affects metabolic processes in the body.


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Kyryliv, B., Hunchak, A., & StefanyshynО. (2018). Activity of hydrolytic enzyme in the poultry of different species. Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series: Agricultural Sciences, 20(89), 95-99.