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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">esoil</journal-id><journal-title-group><journal-title xml:lang="ru">Бюллетень Почвенного института имени В.В. Докучаева</journal-title><trans-title-group xml:lang="en"><trans-title>Dokuchaev Soil Bulletin</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0136-1694</issn><issn pub-type="epub">2312-4202</issn><publisher><publisher-name>V.V. Dokuchaev Soil Science Institute</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.19047/0136-1694-2021-106-49-76</article-id><article-id custom-type="elpub" pub-id-type="custom">esoil-627</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Изменение гидрофобно-гидрофильных свойств органического вещества черноземов Каменной Степи</article-title><trans-title-group xml:lang="en"><trans-title>Changes in the hydrophobic-hydrophilic properties of the organic matter of the chernozems of the Kamennaya Steppe</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4335-3407</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Матвеева</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Matveeva</surname><given-names>N. V.</given-names></name></name-alternatives><email xlink:type="simple">Nataliy_Matveeva@list.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>Милановский</surname><given-names>Е. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Milanovsky</surname><given-names>E. Yu.</given-names></name></name-alternatives><email xlink:type="simple">milanovskiy@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рогова</surname><given-names>О. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Rogova</surname><given-names>O. B.</given-names></name></name-alternatives><email xlink:type="simple">olga_rogova@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФИЦ “Почвенный институт им. В.В. Докучаева”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal Research Centre “V.V. Dokuchaev Soil Science Institute”</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>МГУ им. М.В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>25</day><month>03</month><year>2021</year></pub-date><volume>0</volume><issue>106</issue><fpage>49</fpage><lpage>76</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Матвеева Н.В., Милановский Е.Ю., Рогова О.Б., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Матвеева Н.В., Милановский Е.Ю., Рогова О.Б.</copyright-holder><copyright-holder xml:lang="en">Matveeva N.V., Milanovsky E.Y., Rogova O.B.</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://bulletin.esoil.ru/jour/article/view/627">https://bulletin.esoil.ru/jour/article/view/627</self-uri><abstract><p>Исследовали образцы почв и выделенные из них физические гранулоденсиметрические фракции (илистую с размером частиц менее 1 мкм, легкую (ЛФ) с плотностью менее 2 г/см3 и фракцию остатка) чернозема обыкновенного трех контрастных вариантов опытных полей агроландшафта Каменная Степь Воронежской области: косимой степи, длительного бессменного черного пара и бессменной кукурузы, – основные отличия которых заключаются в обработке (пашня и ее отсутствие) и поступлении/отсутствию растительных остатков и корневых выделений. Содержание ЛФ изменяется в ряду: “косимая степь” &gt; “бессменная кукуруза” &gt; “бессменный черный пар”, – что соответствует направленности изменения содержания общего углерода почвы и снижению величины краевого угла смачивания (КУС) поверхности твердой фазы исследуемых черноземов. Определение содержания общего С и N выявило изменение качественного и количественного состава гранулоденсиметрических фракций при разных вариантах использования. Хроматографическое фракционирование щелочных экстракций гумусовых веществ (ГВ) образцов чернозема и выделенных гранулоденсиметрических фракций позволило выявить повышение степени гидрофильности ГВ при одновременном увеличении гидрофобности поверхности твердой фазы и содержания углерода в почве. ГВ ЛФ “косимой степи” оказались на 63% более гидрофильными по сравнению с ГВ ЛФ “бессменного черного пара” и на 47% – по сравнению с ГВ ЛФ “бессменной кукурузы”. В то время как гидрофильность ГВ ила отличалась на 16 и 27% соответственно. Гидрофильность ГВ исходной почвы на делянке “косимой степи” была на 41% выше гидрофильности ГВ в почве на делянке “бессменного черного пара” и на 24% выше, чем в почве делянки “бессменной кукурузы”. Изменения гидрофильности ГВ гранулоденсиметрических фракций проявляются интенсивнее, чем ГВ почвы. На этом основании изменение степени гидрофильности ГВ гранулоденсиметрических фракций можно считать индикатором деградации почв при различной агрогенной нагрузке. </p></abstract><trans-abstract xml:lang="en"><p>Soil samples and physical size-density fractions isolated from them (silt particle size less than 1 µm, light fraction (LF) with a density of less than 2 g/cm3 and a fraction of the residue) of ordinary chernozem were studied in three contrasting variants of the experimental fields of the Kamennaya Steppe agrolandscape of the Voronezh region: mowed steppe, long-term permanent bare fallow and permanent corn – the main differences of which are in tillage (cultivated and not cultivated lands) and in the supply/absence of plant residues and root secretions. The LF content changes in the series: “mowed steppe” &gt; “permanent corn” &gt; “permanent bare fallow”, which corresponds to the direction of changes in the total carbon content of the soil and a decrease in the value of the contact angle of wetting (CA) of the surface of the solid phase of the studied chernozems. The determination of the total C and N content revealed the change in the qualitative and quantitative composition of the size-density fractions for different land use cases. Chromatographic fractionation of alkaline extractions of humus substances (HS) of chernozem samples and size-density fractions revealed an increase in the degree of hydrophilicity of HS while simultaneously increasing the hydrophobicity of the solid phase surface and the carbon content in the soil. HS of LF of the “mowed steppe” turned out to be by 63% more hydrophilic than HS of LF of “permanent bare fallow” and by 47% more hydrophilic than HS of LF of “permanent corn”. While the hydrophilicity of the HS silt differed by 16 and 27%, respectively. The hydrophilicity of the HS of the original soil in the plot of the “mowed steppe” was by 41% higher than the hydrophilicity of the HS in the soil in the plot of “permanent bare fallow” and by 24% higher than in the soil of the plot of “permanent corn”. In addition, changes in the hydrophilicity of HS of size-density fractions are more intense than the HS of the soil, so the change in the degree of hydrophilicity of HS of size-density fractions is an indicator of soil degradation under different agrogenic pressue.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>жидкостная хроматография гидрофобного взаимодействия</kwd><kwd>гранулоденсиметрическое фракционирование почв</kwd><kwd>гидрофильность</kwd><kwd>гидрофобность</kwd><kwd>краевой угол смачивания</kwd></kwd-group><kwd-group xml:lang="en"><kwd>liquid chromatography of hydrophobic interaction</kwd><kwd>size-density fractionation of soils</kwd><kwd>hydrophilicity</kwd><kwd>hydrophobicity</kwd><kwd>contact angle of wetting</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Адерихин П.Г., Богатырева З.С. 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