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NOVEL ENZYMES FOR FODDERSтезисы доклада Тезисы
- Авторы: Zorov I.N., Rozhkova A.M., Korotkova O.G., Kondratieva E.G., Egorova T.V., Sinitsyn A.P.
- Сборник: 2-nd World Conference on Innovative Nutrition and Feeding ABSTRACT BOOK
- Том: 1
- Тезисы
- Год издания: 2017
- Место издания: AKCongress Budapest
- Первая страница: 54
- Последняя страница: 54
- Аннотация: Feed grains are the most important source of domestic animal feed globally. Feeds are the most expensive component of meat production process. Cows and sheep need 8kg of grain for every 1kg of meat produced, pigs - about 4kg, while poultry consume 1.6 kg of feed per 1 kg of meat. Fodders are blended from various raw materials including corn, wheat, oats, barley, and rice, among many others. Starch, and non-starch polysaccharides (NSP) such as cellulose and beta-glucans, pectins, xylans, and mannans, are present as major structural and energy storage materials in cereals. Modern approach to the breeding of farm animals, poultry, and aquaculture follows several guidelines to fit the requirements especially for organic products and low carbon footprint. Carbohydrases, namely xylanases and beta-glucanases, are widely used in animal nutrition for modification of NSPs to improve the quality of feeds and productivity of animals.Various technological steps like grinding, mixing, and palletization, are applied in the process of feeds preparation to give convenient and efficient form of feeds. Those steps require the use of strong shear forces and high temperatures that can lead to the loss of enzymatic activity. Moreover, xylanases are inhibited by plant proteins like TAXI, XIP, and PGIP, beta-glucanases are effected by GIP1, EPI1, and AVR2 cereal inhibitors. Continuous viscosity measurement of feeds water extracts gives important information on the level of enzyme inhibition in feeds and residual activity of feed enzymes after severe palletization process. Thermostable or uninhibited enzymes could be selected using viscosity tests of water-soluble feeds extracts. Well-balanced enzymatic complex of 1,4- and 1,3- endoglucanases and 1,4--endoxylanases with high molecular activity and low level of inhibition by cereal proteins were expressed in Penicillium sp. production strain. New enzyme preparations obtained with various ratio of b-glucanase/xylanase activities are suitable for use in cereals-based feeds with different composition of wheat, barley, or corn. The animal tests of new enzyme preparation derived from recombinant strains show very promising results with chicken and pigs diets.
- Добавил в систему: Зоров Иван Никитич