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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vetpress</journal-id><journal-title-group><journal-title xml:lang="ru">Аграрная наука</journal-title><trans-title-group xml:lang="en"><trans-title>Agrarian science</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0869-8155</issn><issn pub-type="epub">2686-701X</issn><publisher><publisher-name>Редакция журнала "Аграрная наука"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32634/0869-8155-2023-369-4-87-93</article-id><article-id custom-type="elpub" pub-id-type="custom">vetpress-2583</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ЗООТЕХНИЯ И ВЕТЕРИНАРИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ZOOTECHNICS AND VETERINARY MEDICINE</subject></subj-group></article-categories><title-group><article-title>Влияние различных соединений селена на продуктивность, обменные процессы молодняка крупного рогатого скота</article-title><trans-title-group xml:lang="en"><trans-title>Influence different form of selenium to production and metatabolic process of young cattle</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Клементьев</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Klementiev</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Марат Иванович Клементьев, кандидат сельскохозяйственных наук, докторант</p><p>п. Дубровицы, 60, Московская обл., 142132</p></bio><bio xml:lang="en"><p>Marat Ivanovich Klementiev, Candidate of Agricultural Sciences, doctoral student</p><p>60 Dubrovitsy, Moscow region, 142132</p></bio><email xlink:type="simple">mklementev84@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1889-6063</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чабаев</surname><given-names>М. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Chabaev</surname><given-names>M. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Магомед Газиевич Чабаев, доктор сельскохозяйственных наук</p><p>п. Дубровицы, 60, Московская обл., 142132</p></bio><bio xml:lang="en"><p>Magomed Gazievich Chabaev, Doctor of Agricultural Sciences</p><p>60 Dubrovitsy, Moscow region, 142132</p></bio><email xlink:type="simple">chabaev.m.g-1@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1988-1189</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Цис</surname><given-names>Е. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsis</surname><given-names>E. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Елена Юрьевна Цис, кандидат сельскохозяйственных наук</p><p>п. Дубровицы, 60, Московская обл., 142132</p></bio><bio xml:lang="en"><p>Elena Yurievna Tsis, Candidate of Agricultural Sciences</p><p>60 Dubrovitsy, Moscow region, 142132</p></bio><email xlink:type="simple">tsis-elen@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4242-2239</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Некрасов</surname><given-names>Р. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nekrasov</surname><given-names>R. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Роман Владимирович Некрасов, доктор сельскохозяйственных наук, профессор РАН</p><p>п. Дубровицы, 60, Московская обл., 142132</p><p> </p></bio><bio xml:lang="en"><p>Roman Vladimirovich Nekrasov, Doctor of Agricultural Sciences, professor </p><p>60 Dubrovitsy, Moscow region, 142132</p></bio><email xlink:type="simple">nek_roman@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральный исследовательский центр животноводства — ВИЖ им. академика Л.К. Эрнста</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal Research Center for Animal Husbandry named after Academy Member L.K. Ernst</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>11</day><month>05</month><year>2023</year></pub-date><volume>0</volume><issue>4</issue><fpage>87</fpage><lpage>93</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Клементьев М.И., Чабаев М.Г., Цис Е.Ю., Некрасов Р.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Клементьев М.И., Чабаев М.Г., Цис Е.Ю., Некрасов Р.В.</copyright-holder><copyright-holder xml:lang="en">Klementiev M.I., Chabaev M.G., Tsis E.Y., Nekrasov R.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.vetpress.ru/jour/article/view/2583">https://www.vetpress.ru/jour/article/view/2583</self-uri><abstract><sec><title>Актуальность</title><p>Актуальность. В современных условиях интенсивного ведения животноводства первостепенное значение придается скармливанию хелатных форм микроэлементов, в частности селену (Sе). Цель исследований заключалась в разработке норм скармливания органического Se для телят молочного и послемолочного периодов выращивания.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Научно-хозяйственный и балансовый опыт в АО «Молоди» Чеховского района Московской области на 55 головах молодняка крупного рогатого скота черно-пестрой голштинизированной породы. При проведении исследований телятам 1-й контрольной группы (С-) скармливали корма основного рациона (ОР) без каких-либо добавок Se, тогда как телятам 2-й опытной группы (С+) скармливали ОР и Se в количестве 0,30 мг/кг сухого вещества (СВ) рациона (дополнительно задавался премикс, содержащий селенит натрия), животным 3-й опытной группы (Е100) скармливали дополнительно к ОР Se в органической форме плюс 0,30 мг/кг СВ рациона (в молочный и послемолочный периоды, аналогам из 4-й опытной группы (Е75) скармливали ОР плюс 0,22 мг/кг СВ рациона Se (в органической форме), телятам 5-й опытной группы (Е50) скармливали в составе ОР 0,15 мг/кг Se (в органической форме).</p></sec><sec><title>Результат</title><p>Результат. В среднем за период проведения эксперимента общий среднесуточный прирост живой массы телят опытных групп составил, соответственно, 719 г, 736 г, 781 г, 710 г (или на 6,8%, 9,4%, 16%, 5,5%) и на 8,6% больше по сравнению с контролем и телятами 2-й опытной группы, получавшими неорганическую форму Se согласно нормам потребностей молочного скота.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Relevance</title><p>Relevance. In modern conditions of intensive animal husbandry, primary importance is attached to the feeding of chelated forms of trace elements, in particular selenium. The purpose of the research was to develop norms for feeding organic selenium for calves in the dairy and post-dairy growing periods.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. Scientific, economic and balance experience in JSC «Molodi» of the Chekhov district of the Moscow region on 55 heads of young cattle of a black-and-white Holstein breed. During the studies, the calves of the 1st control group (C-) were fed the feed of the main diet (OR) without any Se additives, while the calves of the 2nd experimental group (C+) were fed OR and Se in an amount of 0.30 mg/kg of dry matter (CB) of the diet (additionally, a premix was set, containing sodium selenite), animals of the 3rd experimental group (E100) were fed in addition to OR Se in organic form plus 0.30 mg/kg of the ration (in the dairy and post-dairy periods, analogues from the 4th experimental group (E75) were fed OR plus 0.22 mg/kg of the Se ration (in organic form), calves of the 5th experimental group (E50) were fed as a part of OR 0.15 mg/kg Se (in organic form).</p></sec><sec><title>Results</title><p>Results. On average, over the period of the experiment, the total average daily increase in live weight of calves of the experimental groups was, respectively, 719 g, 736 g, 781 g, 710 g (or by 6,8%, 9,4%, 16%, 5,5%) and by 8.6% more compared to the control and calves of the 2nd an experimental group that received an inorganic form of selenium according to the norms of the needs of dairy cattle.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>телята молочные</kwd><kwd>откорм</kwd><kwd>органический Se</kwd><kwd>прирост</kwd><kwd>переваримость</kwd><kwd>морфологические показатели крови</kwd><kwd>биохимические показатели крови</kwd></kwd-group><kwd-group xml:lang="en"><kwd>dairy calves</kwd><kwd>organic selenium</kwd><kwd>fattening</kwd><kwd>growth</kwd><kwd>digestibility</kwd><kwd>morphological and biochemical parameters of blood</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания при финансовой поддержке фундаментальных научных исследований Минобрнауки РФ № 121052600314-1.</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of the state task with the financial support of fundamental scientific research of the Ministry of Education and Science of the Russian Federation No. 121052600314-1.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Алиев А.А., Джамбулатов З.М., Гаджиев Б.М. 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