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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">19800</article-id><article-id pub-id-type="doi">10.22363/2312-797X-2022-17-3-315-330</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Soil science and agrochemistry</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Почвоведение и агрохимия</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">Influence of water erosion on the structure and content of labile humic substances in the structural-aggregate fractions of leached chernozems of the Central Chernozem region</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние водной эрозии на структуру и содержание лабильных гумусовых веществ в структурно-агрегатных фракциях черноземов выщелоченных Центрально-Черноземного региона</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9127-9569</contrib-id><name-alternatives><name xml:lang="en"><surname>Vasenev</surname><given-names>Ivan I.</given-names></name><name xml:lang="ru"><surname>Васенев</surname><given-names>Иван Иванович</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Biological Sciences, Professor, Head of Department of Ecology</p></bio><bio xml:lang="ru"><p>доктор биологических наук профессор, заведующий кафедрой экологии</p></bio><email>vasenev@rgau-msha.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7986-8106</contrib-id><name-alternatives><name xml:lang="en"><surname>Gorbunova</surname><given-names>Nadezhda S.</given-names></name><name xml:lang="ru"><surname>Горбунова</surname><given-names>Надежда Сергеевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Biological Sciences, Associate Professor, Department of Ecology and Land Resources</p></bio><bio xml:lang="ru"><p>кандидат биологических наук, доцент кафедры экологии и земельных ресурсов</p></bio><email>vilian@list.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2340-6404</contrib-id><name-alternatives><name xml:lang="en"><surname>Gromovik</surname><given-names>Arkady I.</given-names></name><name xml:lang="ru"><surname>Громовик</surname><given-names>Аркадий Игоревич</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Biological Sciences, Associate Professor, Department of Ecology and Land Resources</p></bio><bio xml:lang="ru"><p>кандидат биологических наук, доцент кафедры экологии и земельных ресурсов</p></bio><email>agrom.ps@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4756-9005</contrib-id><name-alternatives><name xml:lang="en"><surname>Devyatova</surname><given-names>Tatyana A.</given-names></name><name xml:lang="ru"><surname>Девятова</surname><given-names>Татьяна Анатольевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Biological Sciences, Professor, Head. Department of Ecology and Land Resources</p></bio><bio xml:lang="ru"><p>доктор биологических наук, профессор, заведующая кафедрой экологии и земельных ресурсов</p></bio><email>devyatova.eco@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Russian State Agrarian University - Moscow Timiryazev Agricultural Academy</institution></aff><aff><institution xml:lang="ru">РГАУ - МСХА им. К.А. Тимирязева</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Voronezh State University</institution></aff><aff><institution xml:lang="ru">Воронежский государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-09-26" publication-format="electronic"><day>26</day><month>09</month><year>2022</year></pub-date><volume>17</volume><issue>3</issue><issue-title xml:lang="en">VOL 17, NO3 (2022)</issue-title><issue-title xml:lang="ru">ТОМ 17, №3 (2022)</issue-title><fpage>315</fpage><lpage>330</lpage><history><date date-type="received" iso-8601-date="2022-09-26"><day>26</day><month>09</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Vasenev I.I., Gorbunova N.S., Gromovik A.I., Devyatova T.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Васенев И.И., Горбунова Н.С., Громовик А.И., Девятова Т.А.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Vasenev I.I., Gorbunova N.S., Gromovik A.I., Devyatova T.A.</copyright-holder><copyright-holder xml:lang="ru">Васенев И.И., Горбунова Н.С., Громовик А.И., Девятова Т.А.</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/19800">https://agrojournal.rudn.ru/agronomy/article/view/19800</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The structural-aggregate composition of leached chernozems (Voronic Chernozems Pachic according to WRB-2014), the distribution of organic compounds C<sub>org</sub> and labile humic substances (LHS) in the structural-aggregate fractions of carbon in the conditions of a slope type of terrain during the development of erosion were studied. The work was carried out in the northern part of the Voronezh region on the catena, which included a section of the watershed, smoothly turning into a southwestern slope about 1500 m long and 5˚ steep. The soils of the following sections of the catena were studied: 1) the watershed part; 2) the upper part of the slope; 3) the middle part of the slope. It was shown that degradation of the structural-aggregate state occurs in eroded chernozems, accompanied by a deterioration in microstructurality, a decrease in the number of mesoaggregates and a structural coefficient, as well as a loss of a water-resistant structure. According to the results, LHS play a very important role in maintaining the water-stable structure of chernozems. The most significant contribution to the content of C<sub>org</sub> contribute mesoaggregates 5-1 mm in size, which are actively lost during the development of erosion.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Исследованы структурно-агрегатный состав черноземов выщелоченных (Voronic Chernozems Pachic по WRB-2014), распределение в структурно-агрегатных фракциях углерода органических соединений С<sub>орг</sub> и лабильных гумусовых веществ (ЛГВ) в условиях склонового типа местности при развитии эрозии. Работы проводились в северной части Воронежской области на катене, которая включала в себя участок водораздела, плавно переходящий в склон юго-западной экспозиции длинной около 1500 м и крутизной 5º. Исследованы почвы следующих участков катены: 1) водораздельная часть; 2) верхняя часть склона; 3) средняя часть склона. Показано, что в эродированных черноземах происходит деградация структурно-агрегатного состояния, сопровождающаяся ухудшением микроструктурности, снижением количества мезоагрегатов и коэффициента структурности, а также утратой водопрочной структуры. Показано, что ЛГВ играют существенную роль в сохранении водопрочной структуры черноземов. Наиболее весомый вклад в содержание С<sub>орг</sub> вносят мезоагрегаты размером 5-1 мм, которые активно утрачиваются при развитии эрозии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>degradation of chernozems</kwd><kwd>washout</kwd><kwd>microaggregate composition</kwd><kwd>granulometric composition</kwd><kwd>structural coefficient</kwd><kwd>carbon of organic compounds</kwd><kwd>carbon of labile humic substances</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>деградация черноземов</kwd><kwd>смыв</kwd><kwd>микроагрегатный состав</kwd><kwd>гранулометрический состав</kwd><kwd>коэффициент структурности</kwd><kwd>углерод органических соединений</kwd><kwd>углерод лабильных гумусовых веществ</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Gusarov AV, Golosov VN, Sharifullin AG, Gafurov AM. 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