scholarly journals INFLUENCE OF GROWTH-GENERATING SUBSTANCES ON INDICATORS OF SIMILARITY AND PHENOLOGICAL STATE PINE SEEDLING (PINUS SYLVESTRIS) AND SIBERIAN PINE (PINUS SIBIRICA)

2021 ◽  
pp. 27-32
Author(s):  
E.V. Konovalova ◽  
S.V. Kisova ◽  
D.Y. Stavnikov
Keyword(s):  
Pinus Sylvestris ◽  
Pinus Sibirica ◽  
Siberian Pine

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.

scholarly journals Accelerated formation of Siberian pine (Pinus sibirica Du Tour) stands: a case study from Siberia

2019 ◽  
Vol 65 (No. 8) ◽  
pp. 291-300
Author(s):  
Nikita Debkov
Keyword(s):  
Seed Production ◽  
Threshold Value ◽  
Pinus Sibirica ◽  
Natural Conditions ◽  
Normal Seed ◽  
Pine Trees ◽  
Pinus Sibirica Du Tour ◽  
Siberian Pine ◽  
Production Dynamics

Under natural conditions, Siberian pine Pinus sibirica begins to produce commercial cone yields of nuts relatively late (after more than 100 years). The aim of this study was to summarise the experience of the directed formation of Siberian pine forests in Siberia. Experimental objects included plots with traditional thinning of varying intensity and frequency as well as chemical treatment. We assessed the parameters of the stand and its seed production dynamics. Only stands with a minimum density (395–435 trees·ha–1) had a normal seed production energy (1.5 or more cones per shoot). Over-dense stands (830–930 trees·ha–1) were characterised by a low seed production energy (two times or more below the threshold value). In all plots, there were Siberian pine trees with absent or unacceptable seed production energy, which should be removed (DBH up to 28 cm). Seed production energy positively correlated with most tree parameters (age, height, diameter, volume, length and width of crown).

Seasonal shift in the climate responses of Pinus sibirica, Pinus sylvestris, and Larix sibirica trees from semi-arid, north-central Mongolia

2011 ◽  
Vol 41 (6) ◽  
pp. 1242-1255 ◽  
Author(s):  
Louis De Grandpré ◽  
Jacques C. Tardif ◽  
Amy Hessl ◽  
Neil Pederson ◽  
France Conciatori ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Tree Ring ◽  
Growing Season ◽  
Larix Sibirica ◽  
Pinus Sibirica ◽  
North Central ◽  
Central Mongolia ◽  
False Rings ◽  
Seasonal Shift ◽  
Semi Arid

In light of a significant increase in the warming trend observed in recent decades in semi-arid Mongolia, tree-ring attributes and anomalies were analysed to detect potential changes in the growth–climate relationship. In a moisture-limited environment, an increase in temperature could cause a shift in the seasonal response of trees to climate. Chronologies were developed for the dominant tree species (Larix sibirica Ledeb., Pinus sibirica Du Tour, and Pinus sylvestris L.) from north-central Mongolia. In addition to annual ring width, both earlywood and latewood width were measured, and tree-ring anomalies such as false rings and light rings were systematically identified. Earlywood width was mainly associated with precipitation in the year prior to ring formation and early growing season conditions. Temperature was associated with current year growth and mainly influenced latewood development. False rings were good indicators of early summer droughts, whereas light rings were mainly associated with a cold end of summer. A seasonal shift in the significance of monthly climate variables was observed in recent decades. This displacement presumably resulted from changes in the timing and duration of the growing season. Tree growth starts earlier in spring and is now affected by late summer to early autumn climate conditions.

scholarly journals VEGETATION FEATURES OF TUNDRINSKY KEDROVY BOR AND ADJACENT SITES (BY MATERIALS FROM THE «TSARSKY» PROFILE, UROCHISHCHE TUNDRINSKY MATERIK, SREDNEOBSKAYA LOWLAND)

2020 ◽  
Author(s):  
V.N. Tyurin ◽  
◽  
D.V. Bogdanova ◽  
G.M. Kukurichkin ◽  
◽  
...  
Keyword(s):  
Protected Area ◽  
Nature Reserve ◽  
Pinus Sibirica ◽  
Vegetation Map ◽  
Territorial Unit ◽  
Siberian Pine

The vegetation map of the Tundrinsky kedrovy bor for a perspective object as a nature reserve are presented. The conducted analysis of territory along the «Tsarsky» profile reflected a compact allocation of useful near-village forests with siberian pine (Pinus sibirica), allowing them using as an integral territorial unit for a perspective protected area.

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 Diagnostics of genus Pinus representatives resistance to periodical temperature increases during winter-spring period

2019 ◽  
Author(s):  
Н.В. Пахарькова ◽  
Н.А. Кузьмина ◽  
Г.В. Кузнецова ◽  
C.Р. Кузьмин
Keyword(s):  
Abscisic Acid ◽  
Pinus Sylvestris ◽  
Plant Material ◽  
Photosynthetic Activity ◽  
Winter Period ◽  
Pinus Sibirica ◽  
Krasnoyarsk Krai ◽  
Winter Dormancy ◽  
Stone Pine ◽  
Spring Period

Работа посвящена изучению внутривидовых различий представителей рода Pinus (Pinus sylvestris, Pinus sibirica иPinuskoraiensis) по устойчивости к повышению температуры в зимневесенний период. В качестве объектов исследования были взяты искусственные насаждения деревьев этих видов различного происхождения. Для изучения перехода деревьев в состояние покоя и выхода из него был использован метод регистрации кривых термоиндуцированных изменений нулевого уровня флуоресценции, определено содержание хлорофиллов и абсцизовой кислоты в хвое. При рассмотрении внутривидовых отличий выявлено, что в географических культурах Красноярского края нарастание фотосинтетической активности в период выхода из состояния зимнего покоя у северных климатипов (по сравнению с южными) происходит быстрее. Выявлены достоверные различия между богучанским и балгазинским климатипами сосны обыкновенной (р0,001) ермаковским и шегарским сосны сибирской (р 0,01) облученским и чугуевским сосны корейской (р0,01). В хвое северных климатипов, эволюционно сформировавшихся в более холодных районах, в ранневесенний период содержание фотосинтетических пигментов выше, чем у растений южных климатипов, что в совокупности с меньшей глубиной покоя свидетельствует о более высокой потенциальной готовности северных растений к возобновлению фотосинтетической активности. Количество абсцизовой кислоты, как индикатора покоя в предзимний период, в хвое растений южных климатипов заметно преобладает над ее содержанием в северных климатипах у всех исследованных видов. Таким образом, можно констатировать, что представители южных климатипов всех трех видов рода Pinus имеют большую глубину зимнего покоя и большую устойчивость к периодическим повышениям температуры в зимневесенний период по сравнению с северными климатипами, и для целей лесоразведения в период существенного изменения климата в будущем целесообразно использовать посевной и посадочный материал южных климатипов, что позволит минимизировать потери посадочного материала в зимний период от физиологического иссушения. The research addresses intraspecific differences between some species of genus Pinus (Pinus sylvestris, Pinus sibirica and Рinus koraiensis) in resistance to temperature increase during winterspring period. The objects of the research are artificial plantations of these species of different origin. For the study of trees dormant period activation and breaking the method of curves registration of thermal induced changes of zero fluorescence level was used, also chlorophylls and abscisic acid percentage in needles was determined. After analysis of intraspecific differences, it was revealed that in the provenance trial of Krasnoyarsk krai northern climatypes (in comparison with southern) have higher speed of photosynthetic activity increase during winter dormancy breaking. Significant differences were revealed between Scots pine climatypes: boguchany and balgazyn (p0.001) Siberian stone pine climatypes: ermakovskoe and shegarsky (p0.01) and Korean stone pine climatypes: obluchye and chuguevka (p 0.01). In the needles of northern climatypes, which were evolutionary formed in colder regions, in early spring period the percentage of photosynthetic pigments is higher than in plants of southern climatypes. Along with smaller dormancy depth, it indicates high potential readiness of northern plants to renewal of photosynthetic activity. The amount of abscisic acid, as dormancy indicator in close to winter period, is clear higher in the needles of southern climatypes than in northern ones for all studied species. As a result it could be concluded, that representatives of southern climatypes of all three species of genus Pinus have bigger winter dormancy depth and higher resistance to periodical temperature increases. In future for forest cultivation in period of essential climate change, it could be advisable to use seed and plant material from southern climatypes for minimization of plant material losses during winter period from physiological dehydration.

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