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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">hbz</journal-id><journal-title-group><journal-title xml:lang="ru">Хвойные бореальной зоны</journal-title><trans-title-group xml:lang="en"><trans-title>Conifers of the boreal area</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1993-0135</issn><publisher><publisher-name>СибГУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.53374/1993-0135-2024-4-11-16</article-id><article-id custom-type="elpub" pub-id-type="custom">hbz-67</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>БИОЛОГИЯ И ЭКОЛОГИЯ, ЛЕСНОЕ ХОЗЯЙСТВО</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOLOGY AND ECOLOGY, FORESTRY</subject></subj-group></article-categories><title-group><article-title>Видовые особенности изменения  базисной плотности древесины и коры вдоль по стволу дерева</article-title><trans-title-group xml:lang="en"><trans-title>Species features of changes  in the basic density of wood and bark along the stem of a tree</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Плюха</surname><given-names>Н. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Plyukha</surname><given-names>N. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>620100, Екатеринбург, Сибирский тракт, 37 </p></bio><bio xml:lang="en"><p>19, Mira str., Yekaterinburg, 620002</p></bio><email xlink:type="simple">nikcskript@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>Усольцев</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Usoltsev</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>620100, Екатеринбург, Сибирский тракт, 37 </p><p>620144, Екатеринбург, ул. 8 марта, 202а </p></bio><bio xml:lang="en"><p>19, Mira str., Yekaterinburg, 620002</p><p>202а, 8 Marta Str., Yekaterinburg, 620144</p></bio><email xlink:type="simple">Usoltsev50@mail.ru</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>Ангальт</surname><given-names>Е. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Anhalt</surname><given-names>E. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>460014, г. Оренбург, ул. Челюскинцев, 18 </p></bio><bio xml:lang="en"><p>18, Chelyuskintsev str., Orenburg, 460014</p></bio><email xlink:type="simple">elenaangalt@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Уральский государственный лесотехнический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ural Federal University named after the first President of Russia B. N. Yeltsin</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Уральский государственный лесотехнический университет; Ботанический сад Уральского отделения РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ural Federal University named after the first President of Russia B. N. Yeltsin; Botanical Garden, Ural Branch of RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Оренбургский государственный аграрный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Orenburg State Agrarian University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2025</year></pub-date><volume>42</volume><issue>4</issue><fpage>11</fpage><lpage>16</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Плюха Н.И., Усольцев В.А., Ангальт Е.М., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Плюха Н.И., Усольцев В.А., Ангальт Е.М.</copyright-holder><copyright-holder xml:lang="en">Plyukha N.I., Usoltsev V.A., Anhalt E.M.</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://hbz.elpub.ru/jour/article/view/67">https://hbz.elpub.ru/jour/article/view/67</self-uri><abstract><p>В исследованиях биологической продуктивности и углерод депонирующей способности насаждений важное значение имеют квалиметрические характеристики биомассы, в частности, влажность и базисная плотность (БП) древесины и коры ствола. БП как отношение массы абсолютно сухой древесины к ее объему  в свежем состоянии является одной из важнейших квалиметрических характеристик древесного сырья. Она вносит существенный вклад в объяснение изменчивости биомассы ствола и надземной. Известно, что БП видоспецифична, однако данные о распределении БП древесины, и особенно коры, вдоль по стволу довольно редки. Цель нашего исследования состояла в анализе видовых особенностей изменения базисной плотности древесины и коры вдоль по стволу дерева. По данным 3849 дисков, взятых по относительным высотам ствола шести лесообразующих видов вдоль по уральскому меридиану, рассчитаны регрессионные модели смешанного типа, включающие в качестве независимых переменных возраст дерева и диаметр ствола, а также положение диска вдоль по стволу. Видовая принадлежность БП учтена вводом в модель фиктивных переменных.  Установлено, что БП древесины у всех видов монотонно снижается в направлении от основания ствола к вершине, а БП коры монотонно возрастает в том же направлении. Наибольшая БП древесины присуща лиственнице и березе и наименьшая – пихте. Наибольшей БП коры обладает кедр сибирский и наименьшей – сосна обыкновенная.</p></abstract><trans-abstract xml:lang="en"><p>In studies of biological productivity and carbon deposition capacity of forests, the qualimetric characteristics of biomass, in particular, moisture and basic density (BD) of wood and bark of stems, are important. BD, as the ratio of the mass of dry matter of stems to their volume in a fresh state, is one of the most important qualimetric characteristics of wood raw materials. It makes a significant contribution to explaining the variability of stem and aboveground biomass. It is known that BD is species-specific, but data on the distribution of BD of wood, and especially of bark, along the stem are quite rare. The purpose of our study was to analyze the specific features of changes in the basic density of wood and bark along the stem of the tree. According to the data of 3849 disks taken from the relative heights of stems for six forest-forming species along the Ural meridian, regression models of a mixed type were calculated, including as independent variables the age of the tree and the diameter of the stem, as well as the position of the  disk along the stem. The species identity of the BD is taken into account by entering dummy variables into the model. It was found that the BF of wood in all species decreases monotonously in the direction from the base of the stem to the top, and the BD of the bark increases monotonously in the same direction. The largest BD of wood is inherent in larch and birch and the smallest one in fir. Siberian cedar has the highest bark density and Scots pine has the smallest one. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>базисная плотность вдоль по стволу</kwd><kwd>древесина и кора ствола</kwd><kwd>сосна обыкновенная</kwd><kwd>сосна кедровая</kwd><kwd>ель сибирская</kwd><kwd>пихта сибирская</kwd><kwd>береза повислая</kwd><kwd>регрессионные модели</kwd></kwd-group><kwd-group xml:lang="en"><kwd>basic density along the stem</kwd><kwd>wood and bark of the stem</kwd><kwd>Scots pine</kwd><kwd>Siberian cedar pine</kwd><kwd>Siberian spruce</kwd><kwd>Siberian fir</kwd><kwd>silver birch</kwd><kwd>regression models</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена согласно государственному заданию Ботанического сада УрО РАН.</funding-statement><funding-statement xml:lang="en">The publication was prepared based on the results of the research carried out within the framework of the state task of the Botanical Garden, Ural Branch of RAS</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">Исаева Л. 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