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PRODUCTION OF MANNOSE-CONTAINING HYDROLYSATES AND INVESTIGATION OF THEIR ABILITY TO NORMALIZE THE MICROFLORA COMPOSITION OF THE GASTROINTESTINAL TRACT OF POULTRY
Abstract
One of the ways to maintain the normal gastrointestinal tract microflora of poultry is to use prebiotic supplements in their feed. Among the prebiotics used in poultry farming, there are additives based on mannooligosaccharides from the cell walls of the yeast Saccharomyces cerevisiae. There are no similar domestic prebiotic drugs available, which determines the necessity and relevance of their development. For the production of mannose-containing hydrolysates, there was studied the process of hydrolysis of mannans of plant raw materials under the influence of the enzyme preparation of Trichoderma harzianum ?-mannanase. The production of mannose-containing hydrolysates with the maximum degree of mannans splitting was provided by the dosage of the 15 U/g substrate enzyme and the duration of the process for 4 hours. Qualitative and quantitative analysis of the produced hydrolysates revealed the presence of mannose, mannobiose, mannotriose, mannotetrose, mannohexoses in the amount of, in mg / ml: 29.1, 22.1, 42.2, 19.1 and 4.3, respectively. Studying the prebiotic properties of mannose-containing hydrolysates in vitro showed that the maximum accumulation of Bifidobacterium bifidum biomass on medium with these carbohydrates was observed by the 42nd h of cultivation and correlated with the accumulation of organic acids in the medium. Mannose-containing hydrolysates stimulated the development of B. bifidum to a greater extent than mannose and did not rank below to the known commercial prebiotic - inulin. The study of the effect of mannose-containing hydrolysates in the amount from 0.1 to 1% to the feed weight on the gastrointestinal microflora of chickens with experimental dysbiosis showed that an increase in the number of bifidobacteria and lactic acid bacteria was observed already on the 5th day of the experiment in all the doses tested. Complete normalization of the gastrointestinal microflora composition of poultry was observed when mannose-containing hydrolysates were introduced in the amount of 1% to the feed weight on the 10th day.
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