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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Agronomy and Animal Industries</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Agronomy and Animal Industries</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Агрономия и животноводство</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-797X</issn><issn publication-format="electronic">2312-7988</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">20245</article-id><article-id pub-id-type="doi">10.22363/2312-797X-2025-20-3-433-444</article-id><article-id pub-id-type="edn">WNOHOA</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Animal breeding</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Животноводство</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Meat qualitative composition of broiler chickens and feed digestibility when introducing a new organo-mineral feed additive into the diet as an alternative to antibiotics</article-title><trans-title-group xml:lang="ru"><trans-title>Качественный состав мяса цыплят-бройлеров и переваримость корма при введении в рацион новой органоминеральной кормовой добавки как альтернативы антибиотикам</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8264-4616</contrib-id><contrib-id contrib-id-type="spin">9400-5652</contrib-id><name-alternatives><name xml:lang="en"><surname>Ivanishcheva</surname><given-names>Anastasia P.</given-names></name><name xml:lang="ru"><surname>Иванищева</surname><given-names>Анастасия Павловна</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Biological Sciences, research associate at the Testing Center Laboratory</p></bio><bio xml:lang="ru"><p>кандидат биологических наук, научный сотрудник лаборатории «Испытательный центр»</p></bio><email>nessi255@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5125-5981</contrib-id><contrib-id contrib-id-type="spin">9819-1051</contrib-id><name-alternatives><name xml:lang="en"><surname>Sizova</surname><given-names>Elena A.</given-names></name><name xml:lang="ru"><surname>Сизова</surname><given-names>Елена Анатольевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Biological Sciences, Associate Professor, Chief Researcher, Head of the Department of Animal Physiology, Biochemistry, and Morphology</p></bio><bio xml:lang="ru"><p>доктор биологических наук, доцент, главный научный сотрудник, руководитель отдела физиологии, биохимии и морфологии животных</p></bio><email>sizova.l78@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3946-8247</contrib-id><contrib-id contrib-id-type="spin">2977-6059</contrib-id><name-alternatives><name xml:lang="en"><surname>Kholodilina</surname><given-names>Tatyana N.</given-names></name><name xml:lang="ru"><surname>Холодилина</surname><given-names>Татьяна Николаевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Agricultural Sciences, Leading Researcher, Head of the Testing Center</p></bio><bio xml:lang="ru"><p>кандидат сельскохозяйственных наук, ведущий научный сотрудник, руководитель Испытательного центра</p></bio><email>xolodilina@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Federal Scientific Center for Biological Systems and Agrotechnologies of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Федеральный научный центр биологических систем и агротехнологий Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-11-15" publication-format="electronic"><day>15</day><month>11</month><year>2025</year></pub-date><volume>20</volume><issue>3</issue><issue-title xml:lang="en">Varietal breeding — selection and retention of agronomic traits</issue-title><issue-title xml:lang="ru">Сортовая селекция — отбор и закрепление хозяйственно ценных признаков</issue-title><fpage>433</fpage><lpage>444</lpage><history><date date-type="received" iso-8601-date="2025-11-18"><day>18</day><month>11</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Ivanishcheva A.P., Sizova E.A., Kholodilina T.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Иванищева А.П., Сизова Е.А., Холодилина Т.Н.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Ivanishcheva A.P., Sizova E.A., Kholodilina T.N.</copyright-holder><copyright-holder xml:lang="ru">Иванищева А.П., Сизова Е.А., Холодилина Т.Н.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://agrojournal.rudn.ru/agronomy/article/view/20245">https://agrojournal.rudn.ru/agronomy/article/view/20245</self-uri><abstract xml:lang="en"><p>The search for alternative approaches to poultry farming aimed at improving the quality of meat and promoting health without the use of antibiotics is a vital task of modern poultry farming. Among the promising areas is the use as an alternative to antibiotics of complex multifunctional feed additives based on prebiotics, organic acids, and mineral components that contribute to the formation of healthy intestinal microflora, increasing the nonspecific resistance of poultry, as well as the quality of meat and productivity. The study is aimed at studying the effect of a new organo-mineral feed additive (OMFA) containing a prebiotic (lactulose), ultrafine silica dioxide particles, organic and amino acids, on the digestibility of nutrients, elemental, and amino acid composition of broiler chicken meat. The inclusion in the diet of a 4-component OMFA from the age of 7 and 15 days has a positive effect on nutrient absorption. An increase in the digestibility of crude protein, crude fat, and nitrogen-free extractives was noted. Early feeding period reduces the digestibility of crude fiber. The use of OMFA leads to an increase in the concentration of certain macro- and microelements in the tissues of broiler chickens, which has a positive effect on the quality of meat. The inclusion of OMFA in the diet is an effective way to optimize protein and fat metabolism, contributing to an increase in muscle mass and a decrease in the percentage of body fat. The ingredients of the feed additive increase the level of amino acids, which favorably affect the properties and nutritional value of broiler meat. When choosing the composition of the additive and the timing of feeding (from the age of 7 and 15 days), it is recommended to use a four-component OMFA for broiler chickens from the age of 15 days.</p></abstract><trans-abstract xml:lang="ru"><p>Поиск альтернативных подходов к выращиванию птицы, направленных на повышение качества мяса и укрепление здоровья без применения антибиотиков - актуальная задача современного птицеводства. К перспективным направлениям относится использование в качестве альтернативы антибиотикам комплексных многофункциональных кормовых добавок на основе пребиотиков, органических кислот и минеральных компонентов, способствующих формированию здоровой микрофлоры кишечника, повышающих неспецифическую резистентность птицы, а также качество мяса и продуктивность. Исследование направлено на изучение влияния новой органоминеральной кормовой добавки (ОМКД), имеющей в составе пребиотик (лактулоза), ультрадисперсные частицы диоксида кремния, органическую и аминокислоту, на переваримость питательных веществ, элементный и аминокислотный состав мяса цыплят-бройлеров. Включение в рацион 4-компонентной ОМКД с 7- и с 15-суточного возраста положительно влияет на усвоение питательных веществ. Отмечено увеличение переваримости сырого протеина, сырого жира и безазотистых экстрактивных веществ. Ранний срок скармливания снижает переваримость сырой клетчатки. Применение ОМКД приводит к повышению концентрации некоторых макро- и микроэлементов в тканях цыплят-бройлеров, что положительно отражается на качестве мяса. Включение ОМКД в рацион является эффективным способом оптимизации белкового и жирового обмена, способствующей увеличению мышечной массы и снижению процента жира в организме. Ингредиенты кормовой добавки повышают уровень аминокислот, что благоприятно сказывается на свойствах и питательной ценности мяса бройлеров. При выборе состава добавки и сроков скармливания (с 7- и 15-суточного возраста) рекомендовано использовать четырехкомпонентную ОМКД для цыплят-бройлеров с 15 суток.</p></trans-abstract><kwd-group xml:lang="en"><kwd>poultry</kwd><kwd>nutrient digestibility</kwd><kwd>mineral composition</kwd><kwd>organo-mineral complex</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>сельскохозяйственная птица</kwd><kwd>усвояемость питательных веществ</kwd><kwd>минеральный состав</kwd><kwd>органоминеральный комплекс</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Статья опубликована в рамках выполнения государственного задания № FNWZ –2024–0002</institution></institution-wrap><institution-wrap><institution xml:lang="en">The article was published as part of the state task № FNWZ‑2024–0002.</institution></institution-wrap></funding-source></award-group></funding-group></article-meta><fn-group/></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Cai K, Shao W, Chen X, Campbell YL, Nair MN, Suman SP, et al. 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