scholarly journals On the Effect of Thinning on Tree Growth and Stand Structure of White Birch (Betula platyphylla Sukaczev) and Siberian Larch (Larix sibirica Ledeb.) in Mongolia

Forests ◽  
2017 ◽  
Vol 8 (4) ◽  
pp. 105 ◽  
Author(s):  
Alexander Gradel ◽  
Christian Ammer ◽  
Batsaikhan Ganbaatar ◽  
Ochirrragchaa Nadaldorj ◽  
Batdorj Dovdondemberel ◽  
...  
Keyword(s):  
Tree Growth ◽  
Stand Structure ◽  
Siberian Larch ◽  
Larix Sibirica ◽  
Betula Platyphylla ◽  
White Birch

scholarly journals THE INFLUENCE OF CLIMATIC FACTORS ON THE THERMAL VALUES OF BETULA TORTUOSA LEDEB. AND LARIX SIBIRICA LEDEB., GROWING IN THE ECOTONE OF THE ALPINE FOREST-TUNDRA OF THE KUZNETSK ALATAU

ÈKOBIOTEH ◽  
2020 ◽  
Vol 3 (3) ◽  
pp. 478-487
Author(s):  
E.A. Tyutkova ◽  
◽  
S.R. Loskutov ◽  
I.A. Petrov ◽  
◽  
...  
Keyword(s):  
Cell Walls ◽  
Climatic Factors ◽  
Thermal Structure ◽  
Siberian Larch ◽  
Weather Conditions ◽  
Component Composition ◽  
Larix Sibirica ◽  
White Birch ◽  
Alpine Forest ◽  
Summer Temperatures

The results of the study of the thermal structure of early and latewood in the annual rings formed in 1993-2002 in the trees of Arctic white birch (Betula tortuosa Ledeb) and Siberian larch (Larix sibirica Ledeb) grows in the alpine tundra ecotone of The Kuznetsky Alatau. An analysis of the correlation between thermodynamics and mean temperatures and precipitation showed that mainly the June-August weather conditions determine the component composition of early and late birch wood. Air temperature has a noticeable influence on the component composition during the synthesis of cell walls of early and latewood, precipitation - late. The component composition of the early and late foliage trachea was not as sensitive to changing weather conditions. The evaporation rate of the bound latewood water is only observed to be dependent on summer temperatures.

scholarly journals Spatial Variation and Temporal Instability in the Growth/Climate Relationship of White Birch (Betula platyphylla Suk) in the Changbai Mountain, China

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 589
Author(s):  
Yangao Jiang ◽  
Yuting Cao ◽  
Shijie Han ◽  
Junhui Zhang ◽  
Lin Hao
Keyword(s):  
Spatial Variation ◽  
Tree Growth ◽  
Radial Growth ◽  
Temporal Stability ◽  
Changbai Mountain ◽  
Betula Platyphylla ◽  
White Birch ◽  
Spring Precipitation ◽  
Temporal Instability ◽  
Relationship Of

Tree growth in mountain ecosystems is affected by complex environments, and its relationship with climatic and environmental factors varying with elevation. In order to examine the spatial variation and temporal stability of the growth/climate relationship of Betula platyphylla (BP), the dendrochronological method was used to analyze the radial growth/climate relationship between 1946 and 2016 of the BP trees along an altitudinal gradient in the Changbai Mountain of northeast China. Our results showed that the mean sensitivity of BP was higher than that of other species studied in Changbai Mountain. The growth/climate relationship of BP trees varies with altitude, and this conclusion has reached a consensus from the study of tree growth response to climate change. More specifically, at low altitudes (550–995 m a.s.l.), the radial growth of BP is mainly affected by spring precipitation and temperature in May and October of the current year. However, at high-altitude areas (1210–1425 m a.s.l.), it is mainly affected by the temperature in September of the previous year and May of the current year. Furthermore, the growth/climate relationship of BP trees showed temporal instability. After 1970, the rise in temperature inhibited the growth of BP at low altitudes and promoted the growth of BP trees at high altitudes. In the context of continued warming in the future, the white birch stands in Changbai Mountain will move to higher altitudes.

scholarly journals Assessments of the Growth Rate of Siberian larch (Larix sibirica Ledeb.) and its distribution in Mongolian Altai Mountain Range

2018 ◽  
pp. 57-67
Author(s):  
Battulga P ◽  
Tsogtbaatar J ◽  
Gerelbaatar S
Keyword(s):  
Growth Rate ◽  
Tree Growth ◽  
Siberian Larch ◽  
Larix Sibirica ◽  
Mountain Range ◽  
Altai Mountain ◽  
Mongolian Altai ◽  
Larch Forests ◽  
Forest Distribution ◽  
Slow Growing

The Mongolian Altai mountain range stretches from east to west for more than 800 kilometers, and its forest cover is considered the southwestern boundary of the distribution of Mongolian forests and is characterized by a unique combination of high-mountain and desert ecosystems. Siberian larch (Larix sibirica Ledeb.) is one of the main forest-forming tree species in the Mongolian Altai and covers 112.0 thousand ha of area and is distributed at an altitude of 2300 to 2700 m a.s.l. In this study, we attempted a comparative study of tree growth rates in larch forests, which are associated with four different altitudinal zones in the Mongolian Altai, aimed at determinining the lower and upper limits of forest distribution in this region. We used the natural quantitative indicators in this study. We carried out the diameter growth rate analyses on 15 model tree samples taken from the Mongolian Altai and 4 samples from Central Khangai regions. All the trees were divided into fast-growing and slow-growing. The results of the assessments showed that 60 percent of the studied forests belonged to slow-growing forests. Slowest growth rate was observed in the forests of Khan Taishir and Khar Azarga mountains, which are the southernmost tip of conifer forest distribution in Mongolia. For the first time in Mongolia we observed that the upper limit of larch forests reached up to 2700 m a.s.l. Such slow rate of tree growth in larch forests is the result of the existing harsh continental climate, aridity, and high altitudinal distribution in the Mongolian Altai. Our findings can become the scientific basis for the development of a sustainable forest management plan in the forests of the Mongol Altai, taking into account the different growth rate between stands.

Estimate of annual carbon balance of a young Siberian larch (Larix sibirica) plantation in Iceland

Tellus B ◽  
2007 ◽  
Vol 59 (5) ◽  
Author(s):  
Brynhildur Bjarnadottir ◽  
Bjarni D. Sigurdsson ◽  
Anders Lindroth
Keyword(s):  
Carbon Balance ◽  
Siberian Larch ◽  
Larix Sibirica ◽  
Annual Carbon ◽  
Annual Carbon Balance

Study of the properties larch and larch wood construction materials

2016 ◽  
Author(s):  
М.А. Чубинский ◽  
К.В. Чаузов
Keyword(s):  
Weight Loss ◽  
Urea Formaldehyde ◽  
Construction Materials ◽  
Siberian Larch ◽  
Larix Sibirica ◽  
Average Weight ◽  
Biological Stability ◽  
Laminated Beam ◽  
Coniophora Puteana ◽  
Larch Wood

Несмотря на огромные запасы, древесина лиственницы до сего времени в незначительных объемах используется в строительной индустрии, других отраслях экономики, что связано как с технологическими сложностями ее переработки, так и недостаточной изученностью ее свойств. Одним из уникальных свойств древесины лиственницы сибирской (Larix sibirica) является ее повышенная естественная биостойкость, наряду с максимально высокой среди отечественных хвойных пород прочностью. Стойкость древесины лиственницы (Larix sibirica) к воздействию дереворазрушающих грибов Coniofora puteana значительно превышает стойкость сосны. В среднем потеря массы ядровой древесины лиственницы сибирской под воздействием дереворазрушающего гриба Coniophora puteana составляет 14,84%, снижаясь с увеличением возраста дерева, а контрольные образцы из ядровой древесины сосны в возрасте 90 лет имели потерю массы 57,8%. Возраст дерева является одним из наиболее значимых факторов, влияющих на степень биостойкости древесины. По мере его увеличения значительно повышается устойчивость деструктивному воздействию дереворазрушающих грибов Coniophora puteana. Положение образцов также влияет на степень биостойкости древесины, однако эта зависимость слабо выражена по сравнению с влиянием возраста и плотности древесины. Исследования кинетики разложения древесины лиственницы сибирской и роли экстрактивных веществ в развитии дереворазрушающих грибов позволяют утверждать наличие связи биостойкости и содержания в древесине экстрактивных веществ. Для изготовления клееного бруса из древесины лиственницы предложена клеевая композиция, включающая карбамидомеламиноформальдегидный клей и карбамидоформальдегидную смолу, модифицированную шунгитами. Ее применение позволяет получать клеевые соединения, не уступающие по прочности при скалывании массивной древесине, как по сухому образцу, так и после его вымачивания. Таким образом, клееный брус из древесины лиственницы сибирской характеризуется высокими показателями биостойкости, прочности и водостойкости. Despite vast reserves, larch wood so far in small volumes used in the construction industry and other sectors of the economy, which is connected as the technological difficulties of its treatment, as well as insufficient knowledge of its properties. One of the unique properties of the wood of Siberian larch (Larix sibirica) is its increased natural biological stability (decay resistant), along with the highest among the domestic softwood strength. Resistance Larch (Larix sibirica) to the effects of wood-destroying fungi Coniofora puteana is much higher than pine. The average weight loss of Siberian larch heartwood exposed wood-destroying fungi Coniophora puteana is 14.84%, decreasing with increasing age of the tree, and control samples of heartwood pine at age 90 had a weight loss of 57.8%. Age of a tree is one of the most significant factors affecting the degree of biological stability of wood. With the increase it significantly increases the stability of the destructive effects of wood-destroying fungi and Coniophora puteana. The position of the sample in tree also affects the degree of biological stability of wood, but this dependence is poorly developed in comparison with the influence of age and wood density. Studies of the kinetics of decomposition of Siberian larch wood and the role of extractives in the development of wood-destroying fungi suggest a link, and the decay resistant of the content in the wood extractives. For the manufacture of larch glued laminated beam proposed adhesive composition comprising urea and melamine-formaldehyde glue and urea-formaldehyde resins, modified shungites. Its use allows to obtain the bonds are not inferior in strength at shearing solid wood as dry sample, and after soaking. Thus, glued laminated beam from Siberian larch wood is characterized by high decay resistant, strength and water resistance.

scholarly journals Bending properties of dimension lumber produced from Siberian larch (Larix sibirica) in Mongolia

2020 ◽  
Vol 66 (1) ◽  
Author(s):  
Bayasaa Tumenjargal ◽  
Futoshi Ishiguri ◽  
Yusuke Takahashi ◽  
Ikumi Nezu ◽  
Bayartsetseg Baasan ◽  
...  
Keyword(s):  
Siberian Larch ◽  
Larix Sibirica ◽  
Bending Properties ◽  
Dimension Lumber

Complexation of carboxyarabinogalactan of Siberian larch (Larix Sibirica L.) with Kanamycin

2010 ◽  
Vol 83 (3) ◽  
pp. 497-500 ◽  
Author(s):  
R. Kh. Mudarisova ◽  
L. A. Badykova ◽  
E. I. Koptyaeva ◽  
A. A. Fatykhov ◽  
Yu. B. Monakov
Keyword(s):  
Siberian Larch ◽  
Larix Sibirica
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