scholarly journals СИБИРЬ ХУШ, СИБИРЬ ГАЦУУРЫН ТАРЬЦ УРГУУЛСАН СУДАЛГААНЫ ДҮН

2014 ◽  
Vol 52 (2) ◽  
pp. 53-61
Author(s):  
Ц. Дашзэвэг ◽  
С. Амартүвшин
Keyword(s):  
Pine Forests ◽  
Stream Line ◽  
Pinus Sibirica ◽  
Picea Obovata ◽  
Below Ground ◽  
Basic Characteristics ◽  
Academy Of Sciences ◽  
Siberian Pine ◽  
First Time ◽  
P 53

DOI: http://dx.doi.org/10.5564/pmas.v52i2.360 Proceedings of the Mongolian Academy of Sciences Vol.52(2) 2012 p.53-61SOME RESULTS OF EXPERIMENT TO RAISE SEEDLING OF PINUS SIBIRICA MAYR. AND PICEA OBOVATA LDB.Abstract: In Mongolia, Picea obovata Ldb. grows along the river basin and stream line in mixture with main species of trees. The area of forest dominated by Picea obovata Ldb. is 31.92 thousand hectare in total, which equals to 0.3% of total forest of the country (excluding Saxsaul forest).Experiment to raise Picea obovata seedling has been conducted in forest-vegetational zone of Western Khentii, first time in Mongolia. Experiment found that the most suitable period Picea obovata seeds are between 25 May and 5 June. This paper also presents agro-technique of raising Picea obovata Ldb. seedlings, linear parameters of above and below ground parts of seedling and biomass.Distribution of Siberian Pine forests (Pinus sibirica, Mayr.), basic characteristics, types and present status of Siberian Pine forests of Mongolia are been given in detail. Research of raising seedlings of Siberian Pine was conducted in Tunkhel area of Mandal soum, Selenge aimag, 2003 onwards, and the agrotechnique of raising seedlings of Siberian Pine is been determined.DOI: http://dx.doi.org/10.5564/pmas.v52i2.360 Proceedings of the Mongolian Academy of Sciences Vol.52(2) 2012 p.53-61

scholarly journals Geoactive Zones and the Structure of Plant Communities in Connection With New Discoveries in Space Geology

2021 ◽  
Vol 7 (1) ◽  
pp. 33-48
Author(s):  
M. Rogozin
Keyword(s):  
Pinus Sibirica ◽  
Comfort Zone ◽  
Space Images ◽  
Picea Obovata ◽  
Siberian Spruce ◽  
Large Trees ◽  
Ring Structures ◽  
Pinus Sibirica Du Tour ◽  
Siberian Pine ◽  
Geodynamic Activity

The purpose of the work is to find out how plants react to such zones and whether their phytoindication is possible. Two territories of the Perm territory were studied: the Vishersky Nature Reserve and forests near Perm. The research methodology included lineament and geostructurometric analysis of space images and special maps using ring structures discovered on the Earth’s surface by Yu. I. Fivenskii, as well as phyto- and bioindication of small geoactive zones. It was found that in the forests near Perm favorable zones of such zones occupy 1.44% of the territory and within their limits the safety of common pine (Pinus sylvestris L.) is 29–42 times higher. Phytoindication of small geoactive zones of 1.0 and 3.0 m by common pine was shown in the zones of influence of these zones: 0–18 cm — the radius of inhibition with the absence of trees; 19–29 cm — the depression zone with small trees; 30–48 cm — the comfort zone with medium and large trees. Two types of networks formed by zones of 1.0 and 8.0 m in size near Perm (on the plain) and in the reserve (in the mountains) were compared. In the mountains, with high geodynamic activity of territories, the networks are oriented in one direction, while on the plain their orientation is misaligned by 30°. In the reserve, large trees of Siberian spruce (Picea obovata Ledeb.) were located on small geoactive zones of 1.0 and 8.0 m, and trees of Siberian pine (Pinus sibirica Du Tour) — on zones 1.0 and 3.0 m in combination with zones 16, 32 and 55 m. In the subgolets zone, ring structures of perennial plants were also found on the first two types of zones. In addition, along the edges of the swamps, chains of trees were found whose direction coincides with ring faults, and the chains themselves are similar to the structure of small geoactive zones networks, and this fractality requires field verification. The hypothesis recharge of plants within geoactive zones is proposed, which also explains the successful growth of trees on rocks, where the amount of available soil is minimal.

scholarly journals Forest cover dynamics of the Bazoy Siberian pine (Pinus sibirica Du Tour) forest from 1915 to 2015

2020 ◽  
Vol 73 (1) ◽  
pp. 52-63
Author(s):  
Nikita Debkov ◽  
Victor Sidorenkov ◽  
Elena Sidorenkova ◽  
Vladimir Sedykh
Keyword(s):  
Forest Cover ◽  
Food Product ◽  
Pine Forests ◽  
West Siberian Plain ◽  
Pinus Sibirica ◽  
Human Economic Activity ◽  
Pine Stands ◽  
Siberian Pine ◽  
The Impact

Abstract The article considers the long-term (100 years) dynamics of the forest cover of the southernmost unit of Siberian pine forests on the West Siberian plain. A key feature of forest management is that Siberian pine seeds are a valuable food product and, when cutting forests, this tree species, as a rule, is preserved. The basis of the experimental data was the material of the national forest inventories of 1915, 1974 and 2015 for a total area of 1,420.41 ha. During the period from 1915 to 2015, the forested area changed slightly (96.2 and 94.0%), while the share of Siberian pine stands increased significantly from 48.4 to 58.7%. Grassy Siberian pine forests (32.1%) of optimal age (120–140 years), which are characterised by the best seed productivity and the largest share of Siberian pine in the community (77%), predominate. Basically, human economic activity results in an increase in the area of Siberian pine stands, when deciduous stands with Siberian pine undergrowth are used for fuel and as building material. A decrease in the area of Siberian pine forests occurs mainly under the impact of fires. In the conflagrations of 1915–1920, 7 to 38% of silver birch forests have no Siberian pine undergrowth and are considered long-term secondary communities. In the remaining area, the proportion of Siberian pine undergrowth is 20–30% with a density of 800–1200 seedlings ha−1, which is sufficient for the natural formation of Siberian pine forests.

Formation of Siberian Pine Forests by Improvement Felling on Former Agriculturаl Lands

2021 ◽  
pp. 9-19
Author(s):  
Sergey V. Zalesov ◽  
Keyword(s):  
Pine Forests ◽  
Pinus Sibirica ◽  
Single Shot ◽  
Agricultural Lands ◽  
Herbaceous Vegetation ◽  
Second Stage ◽  
Pine Trees ◽  
Pinus Sibirica Du Tour ◽  
Siberian Pine ◽  
Intensive Growth

On the base of the researches carried out on the permanent study area silvicultural effectiveness of improvement felling was analyzed in soft-leaved plantations formed on the former agricultural lands in Khanty-Mansi Autonomons Okrug – Yugra. It was experimentally found that among 25–30-year-old soft-leaved stands there is Siberian pine (Pinus sibirica Du Tour); besides this, nominal undergrowth of this species can be found under the canopy. Improvement felling can provide an increase in the share of Siberian pine in the composition of the forming plantations and even its dominance in stands. It is recommended to carry out improvement felling by the strip method. On the first-stage the felling of soft-leaved species in strips of 10 m wide is carried out, while leaving strips of similar width without care. On the second stage in 10 years soft-leaved trees are cut down in those strips where care was not taken. Felling of all the accompanying Siberian pine trees in a single shot is inadmissible, since it leads to intensive growth of herbaceous vegetation, sodding and exclusion of the Siberian pine undergrowth as well as dramatically increases the fire danger in spring and autumn. In addition, at the indicated intensity, the specimens of Siberian pine left for cultivation are affected by Pineus cembrae (Cholodovsky, 1988).

scholarly journals Photosynthetic Pigments in Siberian Pine and Fir under Climate Warming and Shift of the Timberline

Forests ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 63 ◽  
Author(s):  
Nina Pakharkova ◽  
Irina Borisova ◽  
Ruslan Sharafutdinov ◽  
Vladimir Gavrikov
Keyword(s):  
Climate Change ◽  
Climate Warming ◽  
Weather Conditions ◽  
Pinus Sibirica ◽  
Conifer Forest ◽  
Chlorophyll A And B ◽  
Sunny Weather ◽  
Pinus Sibirica Du Tour ◽  
Siberian Pine ◽  
First Time

Research Highlights: For the first time, the Pinus sibirica Du Tour and Abies sibirica L. conifer forest at the West Sayan ridge timberline has been explored to reveal which species is likely to react to climate change and a shift of the timberline. Such a shift may modify the ecological functions of the forests. Background and Objectives: Long-term climate change has become obvious in the mountains of southern Siberia. Specifically, a half-century rise in annual mean temperatures has been observed, while precipitation remains unchanged. Trees growing at the timberline are likely to strongly react to climate alterations. The objective was to estimate which of the two species sharing the same habitat would benefit from climate alteration and shifting of the timberline. Materials and Methods: At several altitudes (from 1413 to 1724 m a.s.l.), samples of P. sibirica and A. sibirica needles have been collected and contents of chlorophyll a and b as well as carotenoids were measured in June 2019. The temperature of needles of the two species was measured in both cloudy and sunny weather conditions. Results: The studied species have been shown to have different patterns of pigment variations with the growth of altitude. The decline of chlorophylls and carotenoids was more pronounced in P. sibirica (ratio at timberline ca. 2.2) than in A. sibirica (ratio ca. 3.1). Accordingly, the electron transport rate decreased more strongly in P. sibirica at the timberline (ca. 37.2 μmol of electrons/m−2 s−1) than in A. sibirica (56.9 μmol of electrons/m−2 s−1). The temperatures of needles in both cloudy and sunny weather were higher in A. sibirica (10.5 and 43.3 °C, respectively) than in P. sibirica (3.8 and 24.2 °C, respectively). Conclusions: The considered physiological and ecological traits show that P. sibirica is better protected from higher-altitude hazards (excess insolation, rise of temperature etc.) than A. sibirica. P. sibirica may be therefore a more likely winner than A. sibirica in the movement of the mountain timberline under climate warming in the area.

DISTRIBUTION OF THE SMALL SPRUCE BARK BEETLE IPS AMITINUS (EICHHOFF, 1872) IN WESTERN SIBERIA

2021 ◽  
Vol 14 (4) ◽  
pp. 77-84
Author(s):  
I. A. Kerchev ◽  
S. A. Krivets ◽  
E. M. Bisirova ◽  
N. A. Smirnov
Keyword(s):  
Bark Beetle ◽  
Western Siberia ◽  
Pine Forests ◽  
Invasive Pest ◽  
Pinus Sibirica ◽  
Spruce Bark Beetle ◽  
Pine Nut ◽  
Spruce Bark ◽  
Pinus Sibirica Du Tour ◽  
Siberian Pine

The data on distribution of small spruce bark beetle Ips amitinus (Eichh.) (Coleoptera: Curculionidae: Scolytinae), a new invasive pest of European origin on the territory of Western Siberia are presented. Alien bark beetle species was recorded in the Siberian pine forests of the Tomsk, Kemerovo and Novosibirsk regions. According to the modern data the total invasion range is more than 30 thousand km² with a tendency to further expansion. The number outbreaks of I. amitinus in Siberian pine forests near settlements, in nature preservations and plantations of Pinus sibirica Du Tour cause significant harm to pine-nut harvesting and selective breeding.

scholarly journals Diversity of Pinus sibirica forest types in different bioclimatic sectors of Sayan Mountains

2019 ◽  
Vol 16 ◽  
pp. 00045
Author(s):  
Dilshad M. Danilina ◽  
Dina I. Nazimova ◽  
Maria E. Konovalova
Keyword(s):  
Renewal Process ◽  
Floristic Composition ◽  
Pine Forests ◽  
Pinus Sibirica ◽  
Forest Types ◽  
Age Dynamics ◽  
Restoration Age ◽  
Characteristic Features ◽  
Siberian Pine

The typological diversity of the three climatic facies of Siberian pine forests is considered in various bioclimatic sectors of the Prienisseysky Sayans. In each of the Sayan bioclimatic sectors, Siberian pine forests have a number of characteristic features of floristic composition and phytocenotic structure, restoration-age dynamics, productivity, and renewal process.

scholarly journals Результаты интродукции кедровых сосен в Магаданской области

2020 ◽  
pp. 62-69
Author(s):  
V. B. Dokuchaeva ◽  
◽  
N. E. Dokuchaev ◽  
Keyword(s):  
Climatic Changes ◽  
Pinus Sibirica ◽  
Magadan Oblast ◽  
The South ◽  
Local Conditions ◽  
Generative Phase ◽  
Pinus Sibirica Du Tour ◽  
Favorable Conditions ◽  
Siberian Pine ◽  
First Time

Data on introduction of Siberian (Pinus sibirica Du Tour) and Korean (P. koraiensis Siebold et Zucc.) cedar pines in the south of Magadan Oblast are given. In 2018, male microstrobiles and female cones were formed on the Siberian pine for the first time here. The entry of the tree into the generative phase of development indicates a successful acclimatization of this species to the local conditions. Climatic changes observed in recent decades have provided sufficiently favorable conditions for the growth of introduced species of straight standing cedar pines in the south of Magadan Oblast. The results obtained show that cedar pines can be cultivated and used as decorative plantations in the conditions of Northern Priokhotye.

ABEL PRIZE AS THE FLAGSHIP OF WORLD MATH ADVANCES

2020 ◽  
pp. 57-71
Author(s):  
Nataliya V. Grishina ◽  
Keyword(s):  
Great Britain ◽  
Nobel Prize ◽  
Historical Background ◽  
Famous Scientist ◽  
International Authority ◽  
Academy Of Sciences ◽  
First Time

The annual prize, awarded by the Norwegian Academy of Sciences, bears the name of the famous scientist Niels-Henrik Abel and has a reputation as a Nobel Prize for mathematicians, with its size in terms of money of about $1 million. Since Alfred Nobel, in his will, determined the range of scientific areas for the payment of bonuses that did not include mathematics, the Norwegian mathematician Sofus Lee at the end of his life devoted all his efforts and his international authority to create a foundation for awarding prizes to mathematicians. He wanted to give the award the name of Niels Henrik Abel, also a Norwegian mathematician. The article presents a historical background for the formation of the Abel Prize. The winners of the main mathematical prize for all the years of its existence and their major achievements are shown. Among laureates of the Abel Prize there are outstanding scientists from 11 countries: France, Great Britain, Lebanon, USA, Hungary, Sweden, India, Belgium, Russia, Canada and Israel. Three times the prize was at once awarded to two scientists. And in 2019, for the first time ever the woman – Karen Keskalla Uhlenbeck – professor, American mathematician, became the winner of the prestigious mathematics award.

Root with Alternation of -ravn-/-rovn- (From Materials of the Academic Description of Russian Spelling)

2020 ◽  
Vol 81 (6) ◽  
pp. 90-96
Author(s):  
E. V. Arutiunova ◽  
E. V. Beshenkova ◽  
O. E. Ivanova
Keyword(s):  
Russian Language ◽  
Study Guides ◽  
Russian Academy Of Sciences ◽  
Academy Of Sciences ◽  
The Given ◽  
First Time ◽  
The Russian Language

The study investigates the rule of spelling the root -ravn-/-rovn- and is considered to be a fragment of the academic description of Russian spelling, which is currently being under investigation at the Russian Language Institute of the Russian Academy of Sciences. The authors clarify the meanings that determine the spelling of the unstressed root, supplement the lists of exceptions, denote words with meanings not corresponding to the given values-criteria, and, for the first time in linguistics, investigate the words that can be correlated with different values-criteria, that is, they have double motivation. The rule codifies the spelling of words that have double motivation and fluctuate in usus, dictionaries, study guides and reference books. Spelling recommendations for these words correspond to the current linguistic norm and were approved by the Spelling Commission of the Russian Academy of Sciences in 2019. The linguistic commentary to the rule contains the most significant etymological facts concerning the root -ravn-/-rovn- and summarises the scientific and methodological attempts to figure out the distribution of vocabulary with root -ravn-/-rovn- based on the meanings selected in the spelling rules. In the paper it is shown that the instability in spelling of various verbs with the root -ravn-/-rovn- in modern writing and dictionaries is determined by the double motivation of words, as well as contradictory recommendations and gaps in the rules.

scholarly journals Preliminary evaluation for quality of dimension lumber in four common softwoods in Mongolia

2020 ◽  
Vol 66 (1) ◽  
Author(s):  
Murzabyek Sarkhad ◽  
Futoshi Ishiguri ◽  
Ikumi Nezu ◽  
Bayasaa Tumenjargal ◽  
Yusuke Takahashi ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Modulus Of Rupture ◽  
Preliminary Evaluation ◽  
Pinus Sibirica ◽  
Bending Properties ◽  
Picea Obovata ◽  
Dimension Lumber ◽  
Commercial Species ◽  
Characteristic Values

Abstract The quality of dimension lumber (2 by 4 lumber) was preliminarily investigated in four common Mongolian softwoods: Pinus sylvestris L., Pinus sibirica Du Tour, Picea obovata Ledeb., and Larix sibirica Ledeb. to produce high quality dimension lumber for structural use. In total 61, 39, 67, and 37 pieces of lumber were prepared for Pinus sylvestris, Pinus sibirica, Picea obovata, and L. sibirica, respectively. The lumber was visually graded and then tested in static bending to obtain the 5% lower tolerance limits at 75% confidence level (f0.05) of the modulus of elasticity (MOE) and the modulus of rupture (MOR). In addition, the effects of sawing patterns on bending properties were also analyzed. The f0.05 of the MOE and MOR were 4.75 GPa and 15.6 MPa, 3.39 GPa and 11.0 MPa, 3.78 GPa and 11.7 MPa, and 6.07 GPa and 22.3 MPa for Pinus sylvestris, Pinus sibirica, Picea obovata, and L. sibirica, respectively. These results suggested that with a few exceptions, characteristic values of MOR in the four common Mongolian softwoods resembled those in similar commercial species already used. In visual grading, over 80% of total lumber was assigned to select structural and No. 1 grades in Pinus sylvestris and Pinus sibirica, whereas approximately 40% of total lumber in L. sibirica was No. 3 and out of grades. Sawing patterns affected bending properties in Pinus sylvestris and L. sibirica, but did not affect Pinus sibirica and Picea obovata. Dynamic Young's modulus was significantly correlated with bending properties of dimension lumber for the four species. Based on the results, it was concluded that dimension lumber for structural use can be produced from the four common Mongolian softwoods.

Sign in / Sign up

Export Citation Format

Share Document