Gutsol A. Experimental substantiation of efficient use of enzyme preparations and their compositions in feeding swine

The thesis presents the theoretical and experimental material on the use of new enzyme preparations and their compositions in feeding swine of different age and gender. The most optimal dosage of feeding macerasa, minovit, minasa as well as MEK-1 and MEK-2 multi-enzyme compositions are determined on the basis of the complex research conducted. The expediency of new bioactive feed additives applied in rations while breeding swine for meat is substantiated. It is determined that fattening brood sows bioactive feed additives under study has caused a positive impact on their reproductive performance, especially on the quality of newborn piglets. A positive effect of the studied feed additives on growth and survival of piglets, fattening and slaughter performance of young pigs, physical and chemical indicators of meat quality, its protein, fat and acid composition as well as caloric value is ascertained. The research has shown that the use of bioactive feed additives in feeding young pigs facilitates the improvement of digestibility of most nutrients in rations and better assimilation of feed nitrogen by an organism. A positive impact of feed additives on metabolic processes is proved; their ability to stimulate the development of certain structures of the digestive and endocrine systems associated with increased increments through the functional intensification of some organs and systems due to morphological and functional changes is grounded. It confirms one of the working hypotheses of animal ontogenesis acceleration through paratypical factors unlike genetic ones. It is determined that the best productive and biological effect is obtained at feeding macerasa received by coating of cultural broth on bran, in comparison to drying in a stream of hot air. Its use in production conditions at feeding young pigs in the amount 0.4 g per 100 kg of live weight increases average daily increment by 18-20,4% in breeding and fattening and provides return rise of 16,8 UAH per one head. While breeding young pigs the application of minovit in a dose 4 g per 100 kg of live weight increases average daily increment by 9.8% and return rise of 19,4 UAH per one head. Minasa in rations of pigs under production conditions in a dose of 4 g per 100 kg of live weight provides the increase of average increment by 11.1% and return rise of 20,16 UAH per head in the period of fattening. The production testing of efficient usage in feeding multi-enzyme preparations in doses of 1.5 g per head on a daily basis has shown the advantage of applying MEK-1 and MEK-2 multi-enzyme compositions according to increase by 7,9-13,2% in production, by 11,9-14,9% in fattening and return rise of 27,5-35,2 UAH. The positive influence of preparations on the efficacy of feeding farm animals, output of meat and fat produce, reduction of production cost are revealed.