Изучена ширина годичного кольца и доля поздней древесины у деревьев шести контрастных по месту происхождения климатических экотопов (климатипов) сосны обыкновенной, выращиваемых в географических культурах в южной тайге Средней Сибири (Богучанское лесничество) и лесостепи Западной Сибири (Сузунское лесничество) для оценки реакции древесины на условия произрастания. Проведен сравнительный дисперсионный анализ средних значений исследуемых признаков между климатипами в пределах каждого пункта испытания и между пунктами. Исследована динамика элементов древесины и их реакция на погодные условия за многолетний период с помощью корреляционного анализа. Выявлено, что в условиях лесостепи у климатипов в среднем максимальные радиальные приросты отмечаются в возрасте9 лет, в южной тайге - позднее, в 12-16 лет. У климатипов с юга ареала в условиях лесостепи ширина годичного кольца имеет достоверно меньшие значения, чем у представителей северного происхождения. Для климатипов, перемещенных из более теплого климата в южную тайгу, характерны достоверно бóльшие значения ширины годичного кольца, чем у самого северного из исследуемых. Доля поздней древесины у всех изученных климатипов сосны в южной тайге уменьшается по сравнению с лесостепью.Значимая связь доли поздней древесины у климатипов в лесостепи отмечается не только со среднемесячными погодными условиями второй половины вегетационного периода, но и первой, что свидетельствует о более высокой чувствительности структуры ихдревесины к комплексу климатических и экологических условий географических культур по сравнению с южной тайгой. Результаты исследования показывают, что по средним значениям ширины годичного кольца и доле поздней древесины в лесостепи и южной тайге генетически стабильным является богучанский климатип. Благодарность: Автор выражает благодарность Р.В. Роговцеву (начальнику отдела Новосибирской лесосеменной станции Центра защиты леса Новосибирской области, филиала Российского центра защиты леса в г. Новосибирске) за помощь в полевых исследованиях.
Tree-ring width and latewood content were studied to assess the response of wood to growing conditions. Samples were taken from the trees of six Scots pine climatypes with contrast origin, grown in the conditions of provenance trials in southern taiga of Central Siberia (Boguchany forestry) and forest-steppe of Western Siberia (Suzun forestry). A comparative analysis of variance of mean values of the studied features between the climatypes within each test point and between the points is carried out. Correlation analysis was used to analyze the dynamics of the studied traits and as their response to weather conditions over a long period. It was revealed that in the forest-steppe conditions maximal radial increments for all climatypes were observed on average at the age of 9 and in southern taiga at the age of 12-16. Tree-ring width of the climatypes from the south is significantly lower in the foreststeppe conditions than that of of the representatives of northern origin. Climatypes transferred from a warmer climate to southern taiga are characterized by significantly larger values of tree-ring width than in the northernmost of the studied ones. The latewood content decreases in all studied climatypes of pine in southern taiga in comparison with foreststeppe. Significant response of the latewood content of climatypes in forest-steppe is observed not only with average monthly weather conditions of the second part of vegetation period but also with the first. It indicates a higher sensitivity of their wood structure to the complex of climatic and ecological conditions in the provenance trials of forest-steppe compared with southern taiga. The research results show that the Boguchany climatype is genetically stable in terms of the average values of tree-ring width and latewood content in foreststeppe and southern taiga. Acknowledgements: The author is grateful to R.V. Rogovtsev (Head of the Novosibirsk Forest Seed Department of the Centre of Forest Health of Novosibirsk Region - Branch of Russian the Centre of Forest Health) for his assistance in the field work.
Tree-ring width and latewood content were studied to assess the response of wood to growing conditions. Samples were taken from the trees of six Scots pine climatypes with contrast origin, grown in the conditions of provenance trials in southern taiga of Central Siberia (Boguchany forestry) and forest-steppe of Western Siberia (Suzun forestry). A comparative analysis of variance of mean values of the studied features between the climatypes within each test point and between the points is carried out. Correlation analysis was used to analyze the dynamics of the studied traits and as their response to weather conditions over a long period. It was revealed that in the forest-steppe conditions maximal radial increments for all climatypes were observed on average at the age of 9 and in southern taiga at the age of 12-16. Tree-ring width of the climatypes from the south is significantly lower in the forest-steppe conditions than that of of the representatives of northern origin. Climatypes transferred from a warmer climate to southern taiga are characterized by significantly larger values of tree-ring width than in the northernmost of the studied ones. The latewood content decreases in all studied climatypes of pine in southern taiga in comparison with forest-steppe. Significant response of the latewood content of climatypes in forest-steppe is observed not only with average monthly weather conditions of the second part of vegetation period but also with the first. It indicates a higher sensitivity of their wood structure to the complex of climatic and ecological conditions in the provenance trials of forest-steppe compared with southern taiga. The research results show that the Boguchany climatype is genetically stable in terms of the average values of tree-ring width and latewood content in forest-steppe and southern taiga.