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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">10.19047/0136-1694-2021-106-5-48</article-id><article-id custom-type="elpub" pub-id-type="custom">esoil-616</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>Распределение засоления орошаемых почв в районе Сарпинской ложбины Прикаспийской низменности</article-title><trans-title-group xml:lang="en"><trans-title>Distribution of salinity in irrigated soils in the area of the Sarpinskaya hollow in the Caspian lowland</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4609-5650</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кравченко</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kravchenko</surname><given-names>E. I.</given-names></name></name-alternatives><email xlink:type="simple">krav4enko_elena@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/0000-0001-5151-5109</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хитров</surname><given-names>Н. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Khitrov</surname><given-names>N. B.</given-names></name></name-alternatives><email xlink:type="simple">khitrovnb@gmail.com</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>Горохова</surname><given-names>И. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorokhova</surname><given-names>I. N.</given-names></name></name-alternatives><email xlink:type="simple">info@esoil.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><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>5</fpage><lpage>48</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кравченко Е.И., Хитров Н.Б., Горохова И.Н., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Кравченко Е.И., Хитров Н.Б., Горохова И.Н.</copyright-holder><copyright-holder xml:lang="en">Kravchenko E.I., Khitrov N.B., Gorokhova I.N.</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/616">https://bulletin.esoil.ru/jour/article/view/616</self-uri><abstract><p>Изучено современное состояние засоленности орошаемых почв в районе Сарпинской ложбины Прикаспийской низменности, на примере орошаемого участка Дубоовражный в Волгоградской области. На пике орошения в 85–90-х годах прошлого столетия на участке возделывали кормовые травы, полив осуществлялся дождеванием, уровень грунтовых вод оставался удовлетворительным, очаги вторичного засоления почв не отмечались. В настоящее время участок представляет собой частное фермерское хозяйство, где выращивают бахчевые и овощные культуры с использованием капельного орошения, уровень грунтовых вод остается удовлетворительным с локальным образованием верховодки при поливах. Для выявления особенностей процесса засоления орошаемых почв в Сарпинской ложбине по материалам полевых работ 2018–2019 гг. построена модель двумерного распределения (глубина, расстояние) активности ионов (Ca2+, Cl–, Na+) по нескольким профилям вдоль слабовыпуклых гряд и вытянутых понижений между ними и поперек волны мезорельефа. Выявлено, что на территории исследований преобладает естественное засоление почв преимущественно глубже 1 м, связанное с близким залеганием хвалынских шоколадных глин на грядах. Солончаковатые почвы приурочены к вытянутым понижениям между грядами, в которых происходит сосредоточение поверхностного и внутрипочвенного стока на фоне низкой естественной дренированности. Встречаются признаки остаточного вторичного засоления почв, выражающиеся в присутствии хлорида кальция в почвенном растворе. Максимум солей и обменного натрия сосредоточены в нижней части профиля. </p></abstract><trans-abstract xml:lang="en"><p>The current state of salinity of irrigated soils in the area of the Sarpinskaya hollow in the Caspian lowland has been studied, using the example of the Duboovrazhny irrigated plot in the Volgograd region. At the peak of irrigation in the 85-90s of the last century, forage grasses were cultivated on the plot, irrigation was carried out by sprinkler irrigation, the groundwater level remained satisfactory, and there were no foci of secondary soil salinization. Currently, the plot is a private farm, where melons and vegetables are grown using drip irrigation, the groundwater level remains satisfactory with local formation of temporal water saturated layer. To identify the features of the process of salinization in irrigated soils in the Sarpinskaya hollow based on the materials of the field work performed in 2018–2019, a model of two-dimensional distribution (depth, distance) of the activity of ions (Ca2+, Cl–, Na+) over several profiles along weakly concave low ranges and elongated hollows between them and across relief wave was created. It was revealed that natural soil salinization predominates in the study plot mainly deeper than 1 m, and results from shallow bedding of Khvalynian chocolate clays at ranges. Solonchakous soils occur in elongated hollows between ranges where surface and subsurface runoff water is accumulated and natural drainability is low. Residual traces of soil secondary salinization expressed in the presence of calcium chloride in the soil solution were found. The maximum values of salts and exchangeable sodium are concentrated in the deeper part of the soil profile. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>активность ионов натрия</kwd><kwd>сульфатно-хлоридное засоление</kwd><kwd>хлориды кальция</kwd><kwd>хвалынские шоколадные глины</kwd></kwd-group><kwd-group xml:lang="en"><kwd>activity of sodium ions</kwd><kwd>sulfate-chloride salinization</kwd><kwd>calcium chlorides</kwd><kwd>Khvalynian chocolate clays</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">Базилевич Н.И., Панкова Е.И. Опыт классификации почв по содержанию токсичных солей и ионов // Бюллетень Почвенного института имени В.В. Докучаева. 1972. Вып. 5. 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