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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">isplta</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Санкт-Петербургской лесотехнической академии</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-4304</issn><issn pub-type="epub">2658-5871</issn><publisher><publisher-name>СПбГЛТУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21266/2079-4304.2022.240.25-46</article-id><article-id custom-type="elpub" pub-id-type="custom">isplta-157</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>ЛЕСНОЕ ХОЗЯЙСТВО</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>FORESTRY</subject></subj-group></article-categories><title-group><article-title>Таксационная структура и плотность древесины сосны и ели в смешанных искусственных насаждениях Ленинградской области</article-title><trans-title-group xml:lang="en"><trans-title>Taxation structure and wood density of pine and spruce in mixed artificial plantations of the Leningrad Region</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3275-5913</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Раупова</surname><given-names>Д. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Raupova</surname><given-names>D. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>РАУПОВА Диана Эдуардовна – аспирант</p><p>194021, Институтский переулок, д. 5, Санкт-Петербург</p><p>ResearcherID: ABN-5523-2022</p></bio><bio xml:lang="en"><p>RAUPOVA Diana E. – Postgraduate student</p><p>194021, Institutskiy lane, 5, St. Petersburg</p><p>ResearcherID: ABN-5523-2022</p></bio><email xlink:type="simple">diana.raupova@bk.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/0000-0002-7504-5743</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Данилов</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Danilov</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ДАНИЛОВ Дмитрий Александрович – профессор кафедры лесоводства, доктор сельскохозяйственных наук; Главный научный сотрудник</p><p>194021, Институтский пер., д. 5, Санкт-Петербург</p><p>188338, ул. Институтская, д. 1, д. Белогорка, п. Сиверский, Ленинградская обл.</p><p>ResearcherID: S-7007-2019</p><p>ScopusID: 57205402682</p></bio><bio xml:lang="en"><p>DANILOV Dmitry A. – DSc (Agriculture), Professor, Forestry Department; Chief researcher, Doctor of Agricultural Sciences</p><p>194021. Institutskiy lane. 5. St. Petersburg</p><p>1 Institutskaya St., Belogorka, Siversky village, Leningrad region</p><p>ResearcherID: S-7007-2019</p><p>ScopusID: 57205402682</p></bio><email xlink:type="simple">stown200@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный лесотехнический  университет им. С.М. Кирова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>St. Petersburg State Forest Engineering University named after S.M. Kirov</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный лесотехнический университет имени С.М. Кирова; Ленинградский научно-исследовательский институт сельского хозяйства «БЕЛОГОРКА» – филиал ФБГНУ «ФИЦ картофеля имени А.Г. Лорха»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>St.Petersburg State Forest Engineering University; Leningrad Research Institute of Agriculture «Belogorka» – a branch of the Lorch Research Center for Potato</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>25</day><month>02</month><year>2024</year></pub-date><volume>0</volume><issue>240</issue><fpage>25</fpage><lpage>46</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Раупова Д.Э., Данилов Д.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Раупова Д.Э., Данилов Д.А.</copyright-holder><copyright-holder xml:lang="en">Raupova D.E., Danilov D.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://izvestiya-lta.spbftu.ru/jour/article/view/157">https://izvestiya-lta.spbftu.ru/jour/article/view/157</self-uri><abstract><p>Выращивание смешанных насаждений сосны и ели позволяет оптимизировать качественные и количественные показатели выращиваемой древесины. Оценка таксационных показателей в насаждениях с различной густотой позволяет определить оптимальное соотношение пород. Исследование качественных характеристик древесины сосны и ели, в частности плотности древесины, позволяет определить показатели выращиваемого объема древесины сосны и ели. Целью исследования является сравнить таксационные характеристики насаждения с разной долей участия сосны и ели и плотности древесины различного состава. Исследования проводились в 50-летних смешанных искусственных насаждениях сосны и ели с одинаковой первичной густотой посадки, произрастающих на двучленных наносах – тип лесорастительных условий С2. Регион исследования – Ленинградская область, 23 квартал Орлинского участкового лесничества Гатчинского районного лесничества. В смешанных насаждениях были заложены три пробные площади по склоновому рельефу размером 50x50 м площадью 0,25 га каждая. Проведен сплошной перечёт деревьев с замером диаметров на высоте 1,3 м и высот деревьев. Для определения базисной плотности древесины методом максимальной влажности были отобраны керны древесины сосны и ели по всем рядам распределения деревьев по ступеням толщины 2 см на высоте 1,3 м. Исследование показало, что в насаждении составом 5Е5С формируется наиболее плотная древесина. Наибольший запас сформировался в насаждении 6Е4С, что свидетельствует о накоплении объема и оптимальном составе насаждения. Для ели увеличение абсолютной полноты её элемента приводит к снижению плотности её древесины. Для сосны увеличение или снижение плотности её древесины зависит также от показателей абсолютной полноты и густоты сопутствующего елового яруса.</p></abstract><trans-abstract xml:lang="en"><p>Cultivation of mixed plantations of pine and spruce allows us to optimize the qualitative and quantitative indicators of growing wood. Evaluation of taxation indicators in plantations with different densities allows us to determine the optimal ratio of species. The study of the qualitative characteristics of pine and spruce timber, in particular wood density, allows us to determine the indicators of the growing volume of pine and spruce timber. The aim of the study is to compare the taxation characteristics of stands with different shares of pine and spruce and wood density of different composition. The studies were conducted in 50-year mixed artificial plantations of pine and spruce with the same primary density of planting, growing on two-member sediments – type of forest site conditions C2. Region of the study Leningrad region, 23 quarter of Orlinsky district forestry Gatchina district forestry. In mixed plantations, three trial plots (TPs) were established along the slope topography, 50m x 50m in size, 0.25 ha each. A continuous count of trees with measuring diameters at the height of 1.3 m and tree heights was carried out. To determine basic wood density by maximum moisture method, pine and spruce wood cores were sampled in all rows of tree distribution in steps of 2 cm thickness at a height of 1.3 m. The study showed that the plantation composition 5E5C formed the most dense wood. The largest stock was formed in the plantation 6E4C, indicating the accumulation of volume and the optimal composition of the plantation. For spruce, an increase in the absolute completeness of its element leads to a decrease in the density of its wood. For pine, an increase or decrease in its wood density also depends on the absolute completeness and density of the accompanying spruce layer.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>сосна</kwd><kwd>ель</kwd><kwd>средняя высота</kwd><kwd>средний диаметр на высоте груди</kwd><kwd>плотность древесины</kwd><kwd>дисперсионный анализ</kwd><kwd>смешанные искусственные насаждения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>pine</kwd><kwd>spruce</kwd><kwd>average height</kwd><kwd>average diameter at breast height</kwd><kwd>wood density</kwd><kwd>analysis of variance</kwd><kwd>mixed stands</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">Беляева Н.В., Данилов Д.А. Закономерности функционирования сосновых и еловых фитоценозов на объектах рубок ухода и комплексного ухода за лесом. 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