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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">10.32634/0869-8155-2025-391-02-73-79</article-id><article-id custom-type="elpub" pub-id-type="custom">vetpress-3448</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</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ZOOTECHNICS</subject></subj-group></article-categories><title-group><article-title>Исследование влияния гормонального статуса на продуктивные качества бычков герефордской породы КРС</article-title><trans-title-group xml:lang="en"><trans-title>Research of influence of hormonal status on productive qualities of bulls of Hereford cattle breed</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5948-9563</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Миронова</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mironova</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ирина Валерьевна Миронова - доктор биологических наук, профессор, заведующая кафедрой технологии и химии мясных и молочных продуктов; старший научный сотрудник отдела животноводства.</p><p>Ул. 50-летия Октября, 34, Уфа, 450001; ул. 9 Января, 29, Оренбург, 460000</p></bio><bio xml:lang="en"><p>Irina Valeryevna Mironova - Doctor of Biological Sciences; Professor, Head of the Department of Meat and Dairy Products Technology and Chemistry; Senior Researcher at the Livestock.</p><p>34 50-letiya Oktyabrya Str., Ufa, 450001; 29 January 9th Str., Orenburg, 460000</p></bio><email xlink:type="simple">mironova_irina-v@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/0000-0003-2033-3956</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Завьялов</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zavyalov</surname><given-names>О. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Олег Александрович Завьялов - доктор биологических наук, ведущий научный сотрудник.</p><p>Ул. 9 Января, 29, Оренбург, 460000</p></bio><bio xml:lang="en"><p>Oleg Alexandrovich Zavyalov - Doctor of Biological Sciences, Leading Researcher.</p><p>29 January 9th Str., Orenburg, 460000</p></bio><email xlink:type="simple">oleg-zavyalov83@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4525-2554</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фролов</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Frolov</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Николаевич Фролов - доктор биологических наук.</p><p>Ул. 9 Января, 29, Оренбург, 460000</p></bio><bio xml:lang="en"><p>Alexey Nikolaevich Frolov - Doctor of Biological Sciences.</p><p>29 January 9th Str., Orenburg, 460000</p></bio><email xlink:type="simple">forleh@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-1717-3177</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Слинкин</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Slinkin</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Артём Андреевич Слинкин - кандидат биологических наук, доцент кафедры.</p><p>Ул. 50-летия Октября, 34, Уфа, 450001</p></bio><bio xml:lang="en"><p>Artyom Andreevich Slinkin - Candidate of Biological Sciences; Associate Professor of the Department.</p><p>34 50-letiya Oktyabrya Str., Ufa, 450001</p></bio><email xlink:type="simple">s-artemk@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Башкирский государственный аграрный университет; Федеральный научный центр биологических систем и агротехнологий Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Bashkir State Agrarian University; Federal Research Centre of Biological Systems and Agrotechnologies RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Федеральный научный центр биологических систем и агротехнологий Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal Research Centre of Biological Systems and Agrotechnologies RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Башкирский государственный аграрный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Bashkir State Agrarian University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>17</day><month>02</month><year>2025</year></pub-date><volume>0</volume><issue>2</issue><fpage>73</fpage><lpage>79</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Миронова И.В., Завьялов О.А., Фролов А.Н., Слинкин А.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Миронова И.В., Завьялов О.А., Фролов А.Н., Слинкин А.А.</copyright-holder><copyright-holder xml:lang="en">Mironova I.V., Zavyalov О.A., Frolov A.N., Slinkin A.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/3448">https://www.vetpress.ru/jour/article/view/3448</self-uri><abstract><p>Повышение продуктивных качеств мясного скота является важным направлением развития животноводства в Российской Федерации. Гормональный статус сельскохозяйственных животных играет немаловажную роль в развитии их продуктивных и воспроизводительных качеств.</p><p>В настоящем исследовании приведены данные о продуктивных качествах бычков герефордской породы КРС в зависимости от их гормонального статуса. Для оценки гормонального статуса животных можно использовать их волосы. Содержание эстрадиола в волосах позволило разделить животных на группы, различные по концентрации данного гормона, и дать оценку продуктивным качествам бычков в разрезе такого деления. Каждая группа животных находилась под пристальным наблюдением. Контролировались живая масса и ее среднесуточный прирост. Установлено, что скорость роста живой массы бычков была выше у групп с высокими референтными значениями содержания гормона в волосах. После убоя были определены морфологический и химический состав туш подопытных животных. На основании многофакторного анализа определена информативность выщипа шерсти в качестве биосубстрата для оценки гормонального статуса мясных бычков.</p></abstract><trans-abstract xml:lang="en"><p>Improvement of productive qualities of beef cattle is an important direction of livestock breeding development in the Russian Federation. The hormonal status of farm animals plays an important role in the development of their productive and reproductive qualities.</p><p>The present study provides data on productive qualities of Hereford cattle steers depending on their hormonal status. To assess the hormonal status of animals, their hair can be used. The content of estradiol in hair allowed to divide animals into groups, different in concentration of this hormone and to give an estimation of productive qualities of bulls in the context of such division. Each group of animals was closely monitored. Live weight and its average daily gain were controlled. It was found that the growth rate of live weight of steers was higher in groups with high reference values of hormone content in hair. After slaughtering the morphological and chemical composition of carcasses of experimental animals was determined. On the basis of multivariate analysis the informativeness of hair as a biosubstrate for estimation of hormonal status of beef steers was determined.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>гормональный статус</kwd><kwd>бычки герефодской породы</kwd><kwd>эстрадиол</kwd><kwd>продуктивные качества</kwd></kwd-group><kwd-group xml:lang="en"><kwd>hormonal status</kwd><kwd>Gerefod bulls</kwd><kwd>estradiol</kwd><kwd>productive qualities</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследования проведены при финансовой поддержке Российского научного фонда по проекту № 24-16-00093. https://rscf.ru/project/24-16-00093/</funding-statement><funding-statement xml:lang="en">This research was funded by Russian Science Foundation under Project No. 24-16-00093. https://rscf.ru/project/24-16-00093/</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">Miroshnikov S.et al. 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