INFLUENCE OF CLIMATE CHANGES ON TREE-RING CHARACTERISTICS OF SCOTS PINE PROVENANCES IN SOUTHERN SIBERIA (FOREST-STEPPE)

IAWA Journal ◽  
2003 ◽  
Vol 24 (4) ◽  
pp. 371-383 ◽  
Author(s):  
Yu.V. Savva ◽  
F.H. Schweingruber ◽  
E.A. Vaganov ◽  
L.I. Milyutin
Keyword(s):  
Tree Ring ◽  
Scots Pine ◽  
Weather Conditions ◽  
Steppe Zone ◽  
The Other ◽  
Forest Steppe ◽  
Statistical Parameters ◽  
Southern Siberia ◽  
Growth Variability ◽  
Local Weather

Scots pine provenances from all over Russia planted in 1964 at the forest- steppe zone were analyzed. Eight tree-ring characteristics from 12 different provenances were measured densitometrically. The time span of tree-ring observation covers the period from 1969 to 1997. The sensitivity coefficient of latewood width, latewood and maximum densities and latewood percentage decreases in relation to the increasing latitude of the provenances. The growth of all studied provenances is dictated by the local weather and climate. The correlation coefficients of indices between the local provenance and the other provenances are not lower than 0.46–0.97, and the synchronicity coefficients are minimally 0.84. The Euclidean distances vary from 0.11 to 0.13 between the local provenance and the other provenances. All statistical parameters show that the interannual variability reflects the prevailing influence of the local weather conditions. Variability of weather conditions determines up to 87% of the growth variability in the forest-steppe of southern Siberia.

scholarly journals Response of Annual Ring Width and Latewood Content of Scots Pine to Weather Conditions in Provenance Trials

2020 ◽  
pp. 64-80
Author(s):  
S.R. Kuzmin ◽  
◽  
Keyword(s):  
Tree Ring ◽  
Scots Pine ◽  
Ring Width ◽  
Weather Conditions ◽  
Southern Taiga ◽  
Test Point ◽  
Forest Steppe ◽  
Tree Ring Width ◽  
Mean Values ◽  
Provenance Trials

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.

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 Influence of the growth regulator “Regoplant” and microfertilizer “Ultramag Kombi” on photosynthetic activity of potatoes in the forest-steppe zone Republic of North Ossetia-Alania

2021 ◽  
Vol 210 (07) ◽  
pp. 55-65
Author(s):  
Larisa Ikoeva ◽  
Oksana Haeva
Keyword(s):  
Growth Regulator ◽  
Field Experiments ◽  
Photosynthetic Activity ◽  
Low Cost ◽  
Weather Conditions ◽  
Steppe Zone ◽  
Practical Significance ◽  
Forest Steppe ◽  
Photosynthetic Productivity ◽  
North Ossetia

Abstract. The purpose of the work is to study the influence of the growth regulator “Regoplant” and microfertilizer “Ultramag Kombi” on the photosynthetic productivity of the potatoes of the Barna variety based on the results of field experiments in the forest-steppe zone Republic of North Ossetia-Alania. Methods. Studies on the tasks were carried out in 2018–2020. at the experimental site of the NCRIMFA branch of the VSC of RAS in the conditions of the forest-steppe zone Republic of North Ossetia-Alania according to generally accepted methods. The soil of the experimental plot is medium-power heavy loamy leached chernozem, lined with pebbles. Results. It is established, that biological products under identical soil and weather conditions assisted different progress of plants and approach of phases of vegetation. For all variants of the experiment, the number of stems increased by 0,3–0,7 pcs., the height of the stems of potato plants – by 3,8–4,9 cm in comparison with the control. An intense increase in the mass of tops occurred when using a tank mixture (growth regulator “Regoplant” (25 ml/ha) + microfertilizer “Ultramag Combi” (0,75 l/ha)) – by 74 g/bush, or 15.5 % compared with the control variant. During the growing season, the sum of the photosynthetic potential (FP) was 1,070 thousand m2 •days/ha in the control, and on average 1198–1406 thousand m2•days/ha in the experimental variants. The greatest accumulation of dry matter was noted when using a tank mixture – 917 g/m2. The maximum pure photosynthetic productivity was observed in experimental variant IV – 6,52 g/m2•day compared to the control option. Scientific novelty. For the first time in the forest-steppe zone Republic of North Ossetia-Alania the effect of the growth regulator “Regoplant” and microfertilizer “Ultramag Kombi” on photosynthetic activity of potatoes was studied. Practical significance. The studies carried out make it possible to recommend in potato production the use of a tank mixture of an effective growth regulator “Regoplant” at a dose of 25 ml/ha and microfertilizer “Ultramag Combi” at a dose of 0,75 l/ha, as an ecologically safe and low-cost agricultural method when processing vegetative plants, providing an increase in yield and quality of tubers.

scholarly journals Successions of microbiotic communities of sandy soils in pine stands of different ages in the forest-steppe zone

2021 ◽  
Vol 6 (48) ◽  
pp. 15-15
Author(s):  
Nikolay Nevedrov ◽  
Ekaterina Kuznetsova ◽  
Elena Baidak ◽  
Galina Popova
Keyword(s):  
Scots Pine ◽  
Sandy Soils ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Microbiological Activity ◽  
Hydrothermal Conditions ◽  
Innovative Methods ◽  
Turf Soils ◽  
Response Increase ◽  
Transformation Processes

Peculiarities of transformation processes in soils should be taken into account when developing strategies for their rational use and optimization of their functions. The purpose of the work is to study the successions of soil microbiotic coenosis of azonal Al-Fe-humus sandy soils in pine forest stands of different age in the cities of the Kursk region. Traditional and innovative methods of studying the microbiological activity of soils are used in the work. Al-Fe-humus sandy soils of the forest-steppe covered with 100-year-old stands of Scots pine emit 2.1-2.3 times more CO2 than Al-Fe-humus sandy soils under 25 - and 70-year-old stands of pine and 1.5 times more than similar soils under herbaceous phytocenoses. It has been established that stands of Scots pine during 100 years of vegetation lead to significant changes in the basic properties of soils, changes in response, increase in podzolic process, changes in hydrothermal conditions, as well as increase in the biomass of the main groups of soil microorganisms (up to 38.1 times). Keywords: MICROMYCETES, ACTINOMYCETES, SANDY PODZOLS, GRAY HUMUS (TURF) SOILS, CO2 EMISSION, MICROBIOLOGICAL ACTIVITY OF SOILS

scholarly journals CLIMATE AS CLIMAX IN ‘KING LEAR’

2018 ◽  
Vol 28 (7) ◽  
pp. 2349-2353
Author(s):  
Fatbardha Doko
Keyword(s):  
Weather Conditions ◽  
King Lear ◽  
The Other ◽  
Literary Works ◽  
Weather And Climate ◽  
Points Of View ◽  
Local Weather ◽  
Harsh Reality ◽  
Structured Play ◽  
The Way

Shakespeare’s tragedies are among the most analyzed and discussed literary works. In his tragedies Shakespeare follows the Aristotelian pattern of drama, so it is easy to notice there all the elements of a tragedy presented in Aristotle’s Poetics. In this paper I will define what climax in literature is and explore the climax of one of the four great tragedies of Shakespeare, that of King Lear. As a masterfully structured play, the central part of the play is the climax itself. But what is the climax of this play, how is it presented, does it have any impact on the characters, how does it change the course of events, etc? Answers to these questions will be given here. As an example of the interactions between men and weather conditions in Shakespeare’s drama, I will explore climate as climax. The climactic moment of the play is the storm, in the 3rd act, when we see the psychological rage of King Lear. Unsurprisingly, Shakespeare exposes the issue of how the local weather durably affects the nature of men as well as by the way their humours are temporarily changed by climate and environment. Yet, I will argue that this issue actually prompts him to reverse traditional points of view in order to show that things also work the other way round. Indeed, in some of his plays, the playwright insists on men’s unfortunate capacities to provoke violent climactic disorders and to generate chaos on earth. So, it is not only the weather and climate that affect the behaviour and humour of people, but the way people feel and behave. The case with King Lear is a perfect example of this problem. The storm that Lear finds himself is actually reflected in his inner state, in his psychological rage due to his disappointment with his two daughters, and facing with the harsh reality for a father, but mostly for being unjust to his younger daughter, Cordelia.

scholarly journals Hylobius species (Coleoptera: Curculionidae) from Siberia and the distribution patterns of adults feeding in Scots pine stands

2000 ◽  
Vol 11 (1) ◽  
pp. 57-66
Author(s):  
Andrei Gourov
Keyword(s):  
Scots Pine ◽  
Distribution Patterns ◽  
Steppe Zone ◽  
Southern Taiga ◽  
Forest Steppe ◽  
Taiga Zone ◽  
Mature Trees ◽  
Additional Food ◽  
Pine Stands ◽  
Scots Pine Stands

Seven Hylobius species are known from Siberia, while the occurrence of three of them is doubtful. Information available about the supplementary feeding of adult weevils is reviewed. It is likely that H. abietis and H. albosparsus are the only species of economic significance in this territory. In the northern forest-steppe zone, adult weevils usually prefer to feed separately on isolated or border young trees under the canopy of light Scots pine stands, but avoid the undercanopy regeneration in the dense stands. In the southern taiga zone, adults are abundant on cutover areas where they feed in clumps of young regeneration. In fresh clearcuts, up to 100% of juvenile trees may be damaged by the feeding of weevils, whereas the damage intensity declines sharply with the distance to the clearcut. An edge effect in the distribution of adult weevils needs verification and, probably, is time-dependent. Inside the stands, the crowns of mature trees may constitute an additional food niche for adults if the usual sources and preferred environmental conditions are not available.

scholarly journals Impact of weather conditions during the growing season on winter barley yield in the Forest-Steppe zone of Ukraine

2016 ◽  
Vol 0 (4(33)) ◽  
pp. 39-44
Author(s):  
О. А. Демидов ◽  
В. М. Гудзенко ◽  
С. П. Васильківський
Keyword(s):  
Weather Conditions ◽  
Growing Season ◽  
Steppe Zone ◽  
Winter Barley ◽  
Forest Steppe

scholarly journals On the Quality of Bare-Grained Oats and Influence of its Cultivation Technology Elements on the Yie

2021 ◽  
Vol 14 (4) ◽  
pp. 1754-1759
Author(s):  
Elena Anatolyevna Yegushova
Keyword(s):  
Quality Indicators ◽  
Early Period ◽  
Weather Conditions ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Seeding Rate ◽  
Sowing Time ◽  
Northern Forest ◽  
Pure Steam ◽  
Sowing Period

The research was carried out with the aim to establish the formation regularity of both yield and its elements, as well as to formulate technological and quality indicators of bare-grained oats under the influence of different sowing periods. The studies were carried out in the conditions of the northern forest-steppe zone of the Kemerovo region (Russia) on the territory belonging to the Kemerovo Research Institute of Agriculture, a branch of the SFNCA RAS in 2018-2019. The soil of the site is leached chernozem, heavy loamy in granulometric composition, of medium thickness. The object of research was the mid-season variety of bare-grained oats Bare-grained. The predecessor is pure steam. Sowing was carried out in three periods: early – on May 4 (when the soil was physically ripe, subsequent ones with an interval of 8-10 days, depending on the prevailing weather conditions), medium - on May 12 and 14, late - on May 20 and 24. Against the background of each sowing period, the seeding rates of 4.0 were studied; 4.5; 5.0; 5.5; 6.0 million crops/ha. It has been established that the optimal sowing time for obtaining high quantitative indicators (yield, number of grains, grain size) of bare-grained oats in the northern forest-steppe of the Kemerovo region is an early period (first decade of May); while a later period (third decade of May) is more promising for such high-quality indicators as protein content, fat in grain, essential and nonessential amino acids, etc. The optimal seeding rate for bare-grained oats at early sowing period is 4.0-4.5 million/ha. At a later period, it is advisable to increase the seeding rate to 5.0-5.5 million/ha.

scholarly journals Trypsin inhibitor activity in representatives of the genus Hedysarum (Fabaceae): the polyvariance of seasonal dynamics in Southern Siberia

2020 ◽  
Vol 181 (3) ◽  
pp. 25-31
Author(s):  
E. V. Zhmud ◽  
N. S. Zinner ◽  
O. V. Dorogina
Keyword(s):  
Seasonal Dynamics ◽  
Western Siberia ◽  
Steppe Zone ◽  
Seasonal Development ◽  
Forest Steppe ◽  
Trypsin Inhibitor Activity ◽  
Altai Republic ◽  
Forest Zone ◽  
Practical Utilization ◽  
Southern Siberia

Background. Trypsin-inhibiting activity (TIA) is one of the factors of plant immunity. This factor provides the presence of general non-specific systemic resistance. Representatives of the genus Hedysarum L. are promising medicinal and high-protein fodder plants with high TIA in the leaves. High TIA values in the aboveground part of plants lead to a decrease in protein assimilation by animals. Therefore, identifying the differentiation in the features of TIA seasonal dynamics will make it possible to use the potential of these species most effectively under the conditions of Southern Siberia.Materials and methods. TIA in the leaves of mature generative plants of Hedysarum theinum Krasnob. and H. flavescens Regel & Schmalh. was analyzed. H. theinum is a rare species for Siberia; H. flavescens is a settled one in the forest-steppe zone of Western Siberia. The studies were conducted with H. theinum in 2010 under natural conditions (Altai Republic) and in cultivation (forest zone of Western Siberia). In 2017, H. theinum and H. flavescens were studied under cultivation in the forest-steppe zone of Western Siberia. The research method was based on the spectrophotometric measurement of the optical density in protein substrate (BAPA) decomposition products under the effect of trypsin (at 405 nm). Bovine trypsin manufactured by ISNBiomedical (USA) was used. BAPA (Na -benzoyl-DL-argininep-nitroanilide) served as a substrate.Conclusions. The TIA values in the flowering phase of seasonal plant development reached their maximum only under favorable conditions: in Altai Republic for the leaves of H. theinum, and in the foreststeppe zone of Western Siberia for H. flavescens. TIA values in H. theinum did not increase during flowering in the forest zone of Western Siberia and significantly decreased in the forest steppe. In view of these findings, these two species may be recommended for practical utilization in this phase of seasonal development. 

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