scholarly journals Scots Pine (Pinus sylvestrisL.) Undergrowth on the Dumps of the Chrysotile Asbestos Deposit

2021 ◽  
pp. 22-33
Author(s):  
Yuriy V. Zaripov ◽  
◽  
Sergey V. Zalesov ◽  
Evgeniia S. Zalesova ◽  
Artem S. Popov ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Silver Birch ◽  
Forest Steppe ◽  
West Siberian Plain ◽  
Forest Site ◽  
Chrysotile Asbestos ◽  
Clay Particles ◽  
Salix Caprea ◽  
Covered Area

The studies were carried out on the dumps of overburden rocks and tailings of poor ores of the chrysotile asbestos deposit. According to the scheme of forest site zoning, the studying area belongs to the pre-forest steppe district of pine and birch forests of the Zabaikal’ye plain province of the West Siberian plain forest site area. The survey sites were laid out on the terraces of the dump along the running lines. Undergrowth was counted at each survey site. It was classified by viability, size (small, medium, large), and life form (tree, bush, scrub). The provision with undergrowth of the indicated type of disturbed soils was defined and recommendations for measures aimed at accelerating the process of reforestation were given. Undergrowth on the dumps is represented by Scots pine (Pinus sylvestris L.), silver birch (Betula pendula Roth.), aspen (Populus tremula L.), and goat willow (Salix caprea L.). Scots pine and silver birch are the dominant species in the undergrowth composition. Large share of Scots pine of scrub and bush form is the specific feature of the developing young growth. These specimens were found among small- and medium-sized undergrowth. It is the undergrowth of these heights that becomes an annual attrition without passing into the large-sized category. The latter is the main reason for faster conversion of the dumps into forest-covered area, for increasing the share of clay particles in the upper 50 cm thick dump layer, or for coating the dump surface by non-traditional fertilizers, in particular sewage sludge. It was noted that silvicultural trend in the dump reclamation on the chrysotile asbestos deposit is the most preferable. Scots pine should be preferred as the primary species for reclamation planning. For citation: Zaripov Yu.V., Zalesov S.V., Zalesova E.S., Popov A.S., Platonov E.P., Starodubtseva N.I. Scots Pine (Pinus sylvestris L.) Undergrowth on the Dumps of the Chrysotile Asbestos Deposit. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 5, pp. 22–33. DOI: 10.37482/0536-1036-2021-5-22-33

Radial increment dynamics of Scots pine (Pinus sylvestris L.) as an indicator of hydrothermal regime of the Western Transbaikalia forest steppe

2017 ◽  
Vol 10 (5) ◽  
pp. 476-487 ◽  
Author(s):  
A. V. Demina ◽  
L. V. Belokopytova ◽  
S. G. Andreev ◽  
T. V. Kostyakova ◽  
E. A. Babushkina
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Forest Steppe ◽  
Radial Increment ◽  
Western Transbaikalia ◽  
Hydrothermal Regime

scholarly journals Highly Productive Pine Forests in a Changing Climate

2021 ◽  
pp. 9-23
Author(s):  
Nina F. Kuznetsova ◽  
◽  
Elena S. Klushevskaya ◽  
Elena Yu. Amineva
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Genetic Material ◽  
Weather Conditions ◽  
Test Site ◽  
Pine Forests ◽  
Soil Drought ◽  
Forest Steppe ◽  
Changing Climate ◽  
Vital State

Forest steppe of the Central Chernozem Region (CCR) of Russia belongs to the zone of highly productive pine forests. In 2015, for the first time a partial destabilization of Scots pine (Pinus sylvestris L.) was recorded within the territory of the CCR. It affected the population, organism and cellular levels of Scots pine (Pinus sylvestris L.). The destabilization was caused by the 8-year heatwave of 2007–2014 followed by a sharp drop in the water table and four severe droughts (2007, 2010, 2012, and 2014). The analysis was carried out on two sites of pine forest plantations growing in the environmentally sound region: the Stupino test site (Voronezh region, typical plantation for the CCR) and the Usman site (Lipetsk region, lands with elevated groundwater level). The results of morphological, cytogenetic and biochemical studies of model trees of the Stupino test site during the following periods are presented: 4 optimal years in terms of weather conditions, 2014 drought year and 2015 destabilization year. It was found that prolonged hydrothermal stress resulted in the transition of pine from the basic equilibrium state to a slightly nonequilibrium state. The trigger mechanism for changing their vital state was a severe autumn soil drought in 2014, after which the plants became weakened right before winter. A decrease in cone bioproductivity by the traits of seed fullness and the total number of seeds per cone, a change in population sampling structure, an increase in the number of mitosis pathologies, and an increase in proline content in needles were observed despite optimal weather conditions in 2015. The recovery of species was studied for three subsequent optimal years on the example of the Stupino and Usman populations. Experimental data indicate that the processes of vital state normalization involve profound changes in metabolism and require certain energy expenditures. It took the Stupino population longer to return to the regional norm, which indicates a different depth of destabilization of the tree genetic material of the studied populations. For citation: Kuznetsova N.F., Klushevskaya E.S, Amineva E.Yu. Highly Productive Pine Forests in a Changing Climate. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 6, pp. 9–23. DOI: 10.37482/0536-1036-2021-6-9-23

scholarly journals Selected physical and mechanical properties of Scots pine (Pinus sylvestris L.) wood from stands of younger age classes as criteria for rational utilization of timber

2021 ◽  
Vol 27 (1) ◽  
Author(s):  
Przemysław Marcin Pikiński ◽  
Jaroslav Szaban ◽  
Gerda Šilingienė ◽  
Robert Korzeniewicz ◽  
Witold Pazdrowski
Keyword(s):  
Mechanical Properties ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Bending Strength ◽  
Physical And Mechanical Properties ◽  
Growth Conditions ◽  
Tree Age ◽  
Coniferous Forests ◽  
Forest Site ◽  
Quality Coefficient

The aim of this study was to assess the quality of Scots pine (Pinus sylvestris L.) wood depending on the age of trees, forest site conditions and social class of tree position in the stand. Analyses were based on the determination of specific density and static bending strength, as well as the strength quality coefficient. It was to determine changes in physical and mechanical properties of timber depending on tree age as well as growth conditions reflected in the forest site such as fresh mixed coniferous forests and fresh mixed broadleaved forests. Experimental plots were established in 6 localities with 30, 40 and 60-year-old trees. In each of the stands, a 1-hectare experimental plot was established. Based on the measured DBH and tree height, dimensions of three mean sample trees were calculated, while the classification of social class of tree position in the stand developed by Kraft (1884) was also applied. Analyses were conducted on wood samples with 12% moisture content. Strength tests on wood samples were performed on an Instron 33RH204 universal strength testing machine. A detailed analysis showed properties of pine wood are improved with an increase of tree age in both forest sites. Statistically significant differences were observed for wood density and static bending strength. More advantageous properties were observed for wood of pines from the less fertile forest site, i.e., fresh mixed coniferous forests. Density and static bending strength were markedly determined by tree age and growth conditions. The static bending strength quality coefficient from pines growing in the fresh mixed coniferous forests increased between 30 and 40 years, similarly as it was for the fresh mixed broadleaved forests, while between 40 and 60 years, it deteriorated for the fresh mixed coniferous forests. Wood density from the fresh mixed coniferous forests was by 3% to 7% greater than pines growing in fresh mixed broadleaved forests. In turn, static bending strength of wood from pines growing in fresh mixed coniferous forests was by 4% to 10% greater than trees from the fresh mixed broadleaved forests.  Keywords: Scots pine, wood properties, forest site, Poland

scholarly journals Forest site conditions and the threat for insect outbreaks in the Scots pine stands of Polissya

2020 ◽  
Vol 62 (4) ◽  
pp. 270-278
Author(s):  
Olena Andreieva ◽  
Anatoliy Goychuk
Keyword(s):  
Scots Pine ◽  
Forest Area ◽  
Pine Forests ◽  
Forest Site ◽  
Site Conditions ◽  
Covered Area ◽  
Scots Pine Forests ◽  
Pine Stands ◽  
Forest Enterprises ◽  
Scots Pine Stands

AbstractScots pine (Pinus sylvestris L.) is the most spread forest tree species in Polissya and the most damaged by foliage browsing and stem insects. The aim of this study was to reveal the changes in the distribution of different forest site conditions for 2010–2019 in Scots pine forests of the selected forestry enterprises of Polissya and possible consequences for the spread of foliage browsing insects. Database of Production Association ‘Ukrderzhlisproekt’ (by 2010 and 2019) was analysed for five State Forest Enterprises (FE) that are located in the Central (Zhytomyr Region) and Western (Rivne and Volyn Regions) Polissya, where the large scale outbreaks of stem pests were registered last decade.The types of forest site conditions were designated in accordance with the Ukrainian typology. Distribution of the forest area by trophotops and hygrotops was evaluated for the forest-covered area, for Scots pine stands, and for pure Scots pine stands in 2010 and in 2019.For 2010–2019, the area of all Scots pine forests and its proportion in the forest-covered area has significantly decreased in the most of analysed forest enterprises. The change for 2010–2019 in the distribution both by the tropho-tops and by hygrotops of the entire forest-covered area, the area of all Scots pine forests and pure pine forests is not statistically significant. However, in assessment year 2019, the proportion of stands in the moist types of forest site conditions slightly increased. It may be the result of the stands’ mortality in the driest sites after an outbreak of bark beetles. A greater decrease in the proportion of Scots pine forest area in the dry poor, fresh poor, and dry relatively poor forest site conditions was found in the western direction. Therefore, the noted decrease in the foci areas of foliage browsing insects in Polissya in 2010–2012 compared to the 2000–2002 could be associated with a decrease in the most preferred stands, namely the poorest and driest types of forest site conditions.

scholarly journals Ecological features and species diversity of epiphytic myxomycetes (Myxomycetes) on an ordinary pine (Pinus sylvestris L.) in the forest-steppe and steppe zones of the southeast of Western Siberia

2017 ◽  
Vol 6 (4) ◽  
pp. 23-27
Author(s):  
Anastasiya Vladimirovna Vlasenko ◽  
Vyacheslav Alexandrovich Vlasenko
Keyword(s):  
Species Diversity ◽  
Pinus Sylvestris ◽  
Classical Method ◽  
Petri Dish ◽  
Pine Bark ◽  
Forest Steppe ◽  
West Siberian Plain ◽  
Taxonomic Structure ◽  
Ecological Features ◽  
Favorable Conditions

The species diversity and taxonomic structure of myxomycetes of the epiphytic-corticoid complex has been studied in pine forests on the Pinus sylvestris . The study area is located in the Asian part of Russia, in the southeast of the West Siberian Plain. Species diversity has been revealed using the classical method of moist-chambers, based on the presence in the life cycle of mucus staggering stages - microcysts and sclerotia, from which, under certain favorable conditions, plasmodium and, later, fruit bodies - sporocarpas may appear in the Petri dish. We selected 720 packages for the installation of moist-chambers between 2008 and 2016 in the study area. The experiments with moist-chambers were performed between 2008 and 2017. We received 361 samples of the myxomycetes. A sample is a colony of sporocarpas derived from a single plasmodium. As a result of taxonomic identification we received 28 species of Myxomycetes belonging to 5 orders, 7 families, and 13 genera on the pine bark. It is noted that 6 species of Myxomycetes develop on the pine bark, absent in the area of the study on the bark of other tree species - Echinostelium fragile, Paradiacheopsis rigida, Physarum auriscalpium, Ph. mutabile, Stemonaria nannengae, Willkommlangea reticulata.

Models of 3D crown structure for Scots pine (Pinus sylvestris) and silver birch (Betula pendula) grown in mixed forest

2011 ◽  
Vol 41 (9) ◽  
pp. 1779-1794 ◽  
Author(s):  
Anna Lintunen ◽  
Risto Sievänen ◽  
Pekka Kaitaniemi ◽  
Jari Perttunen
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Betula Pendula ◽  
Mixed Forest ◽  
Silver Birch ◽  
Tree Level ◽  
Plant Structure ◽  
Tree Model ◽  
Mixed Stands ◽  
Crown Structure

The interplay between plant structure and functioning determines vital plant characteristics, such as the efficiency of light capture by the foliage, and thus continuous efforts have attempted to include plant architecture in plant growth models. We constructed two crown structure models enabling the generation of 3D trees using simple tree measurements as input for Scots pine ( Pinus sylvestris L.) and silver birch ( Betula pendula Roth.), boreal species growing in mixed stands. The data for the models were obtained from sample-based digitizing of 3D crown architecture accompanied by characterizations of stem, branch, and foliage volumes and biomass. A set of equations was used to predict local crown characteristics on the basis of local predictors and tree-level input variables such as tree height, crown height, diameter at breast height, and the degree of competition. The 3D tree model was realized within the LIGNUM tree modelling framework. Comparison with data showed that the model adequately predicts the distribution of biomass into different crown components as well as the distribution of foliage within the tree crowns. The applicability of the simulations is at its best when examining Scots pine and silver birch trees growing on medium fertile mixed stands in Finland.

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