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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">10.32634/0869-8155-2023-370-5-52-57</article-id><article-id custom-type="elpub" pub-id-type="custom">vetpress-2619</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 инертных жиров на процессы пищеварения и интенсивность раздоя высокопродуктивных коров</article-title><trans-title-group xml:lang="en"><trans-title>The influence of inert fats on the processes of digestion and intensity of milking of highly productive cows</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9853-1106</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Головин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Golovin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Витальевич Головин, доктор биологических наук, профессор,</p><p>пос. Дубровицы, 60, Московская обл., 142132</p></bio><bio xml:lang="en"><p>Alexander Vitalievich Golovin, Doctor of biological sciences, professor, </p><p>60 Dubrovitsy, Moscow region, 142132</p></bio><email xlink:type="simple">alexgol2010@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Царев</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsarev</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Евгений Александрович Царев, cоискатель,</p><p>пос. Дубровицы, 60, Московская обл., 142132</p></bio><bio xml:lang="en"><p>Evgeny Alexandrovich Tsarev, Degree Candidate,</p><p>60 Dubrovitsy, Moscow region, 142132</p></bio><email xlink:type="simple">odin1985@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 им. 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>05</day><month>06</month><year>2023</year></pub-date><volume>0</volume><issue>5</issue><fpage>52</fpage><lpage>57</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Головин А.В., Царев Е.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Головин А.В., Царев Е.А.</copyright-holder><copyright-holder xml:lang="en">Golovin A.V., Tsarev E.A.</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/2619">https://www.vetpress.ru/jour/article/view/2619</self-uri><abstract><sec><title>Актуальность</title><p>Актуальность. Известно, что высокопродуктивные коровы в первую треть лактации испытывают повышенную потребность в энергии. Одним из эффективных способов повышения энергетической насыщенности рационов является использование защищенных жиров в их кормлении.</p></sec><sec><title>Методы</title><p>Методы. Влияние гидрогенизированного и фракционированного жиров (ГК «ЭФКО», Россия) на процессы рубцового метаболизма, переваримость питательных веществ рационов и интенсивность раздоя молочных коров при скармливании жиров (с 21-го по 120-й день лактации) изучили в опыте, проведенном в экспериментальном хозяйстве «Кленово-Чегодаево» (Москва) на трех группах коров голштинизированной черно-пестрой породы с удоем 7000 кг молока за предыдущую лактацию по 10 голов в каждой.</p></sec><sec><title>Результаты</title><p>Результаты. В физиологических исследованиях установлено, что использование защищенных жиров не оказало отрицательного воздействия на процессы рубцового метаболизма и позитивно влияло на тенденцию лучшего переваривания питательных веществ рационов животными I и II опытных групп по сравнению с контролем при повышении переваримости сырого жира на 2,7–3,1 абс. % (р ≤ 0,05). Учет молочной продуктивности показал, что включения в состав рационов коров опытных групп испытуемых инертных жиров в количестве 300 г/гол/сут с целью повышения КОЭ с 10,7 до 11,0 МДж в 1 кг сухого вещества способствовали увеличению удоя молока 4%-ной жирности за 120 дней лактации на 8,1–9,4% (р ≤ 0,05) по сравнению с контролем, затраты кормов, выраженные в ЭКЕ, снизились на 5,3%, при этом в молоке коров, которым скармливали фракционированный жир, отмечалось увеличение массовой доли пальмитиновой кислоты на 2,29 абс. % (р ≤ 0,05) по сравнению с контролем. В целом за 305 дней лактации валовой удой молока 4%-ной жирности у коров опытных групп превышал контроль на 6,2–7,3% (р ≥ 0,05) при снижении затрат кормов (ЭКЕ) на 4,8%.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Relevance</title><p>Relevance. It is known that highly productive cows in the first third of lactation experience an increased need for energy. One of the effective ways to increase the energy saturation of diets is the use of protected fats in their feeding.</p></sec><sec><title>Methods</title><p>Methods. The effect of hydrogenated and fractionated fats (GC «EFKO», Russia) on the processes of rumen metabolism, the digestibility of dietary nutrients and the intensity of milking of highly productive cows, when used in the period from 21 to 120 days of lactation, was studied in an experiment conducted in an experimental farm «Klenovo-Chegodaevo» (Moscow) on three groups of dairy cows of the holsteinized black-and-white breed with a milk yield of 7000 kg of milk for the previous lactation, 10 animals each.</p></sec><sec><title>Results</title><p>Results. In physiological studies, it was found that the feeding of protected fats did not have a negative effect on the processes of rumen metabolism and had a positive effect on the trend of better digestion of dietary nutrients by animals of I and II experimental groups compared to the control, with an increase in the digestibility of crude fat by 2.7–3.1 abs. % (p &lt; 0.05). Accounting for milk productivity showed that the inclusion of inert fats in the diets of cows of the experimental groups in the amount of 300 g/head/day, in order to increase the concentration of metabolic energy from 10.7 to 11.0 MJ per 1 kg of dry matter, contributed to an increase in milk yield 4% fat content for 120 days of lactation by 8.1–9.4% (p &lt; 0.05), compared with the control, feed costs, expressed in ME, decreased by 5.3%. At the same time, in the milk of cows fed fractionated fat, an increase in the mass fraction of palmitic acid by 2.29 abs. % (p &lt; 0.05), compared with the control. In general, for 305 days of lactation, the gross milk yield of 4% fat in cows of the experimental groups exceeded the control by 6.2–7.3% (p ≥ 0.05), with a decrease in feed costs (ME) by 4.8%.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>кормление коров</kwd><kwd>концентрация обменной энергии</kwd><kwd>гидрогенизированный жир</kwd><kwd>фракционированный жир</kwd><kwd>рубцовый метаболизм</kwd><kwd>переваримость кормов</kwd><kwd>молочная продуктивность</kwd><kwd>жирнокислотный состав</kwd></kwd-group><kwd-group xml:lang="en"><kwd>feeding of cows</kwd><kwd>concentration of metabolic energy</kwd><kwd>hydrogenated fat</kwd><kwd>fractionated fat</kwd><kwd>rumen metabolism</kwd><kwd>milk production</kwd><kwd>fatty acid composition</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке фундаментальных научных исследований Минобрнауки РФ (№ государственного учета НИОКТР АААА-А18-118021590136-7).</funding-statement><funding-statement xml:lang="en">The work was supported by the Ministry of Education and Science of the Russian Federation for fundamental scientific research (state registration No. NIOKTR AAAA-A18-118021590136-7).</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">Головин А.В., Некрасов Р.В., Харитонов Е.Л. 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