scholarly journals White poplar (Populus alba L.) stands in Ukraine: the current state, growth specificities and prospects of using for forest plantations

2021 ◽  
Vol 48 (1) ◽  
pp. 63-72
Author(s):  
Natalia Vysotska ◽  
Maksym Rumiantsev ◽  
Oleksii Kobets
Keyword(s):  
Age Distribution ◽  
Forest Steppe ◽  
Forest Site ◽  
Productive Capacity ◽  
Plantation Forest ◽  
White Poplar ◽  
Forest Zone ◽  
Natural Zones ◽  
Current State ◽  
State Growth

Abstract The aim of the study was to assess the current state and evaluate the productivity of white poplar stands by natural zones within Ukraine and to define the prospects for their use for plantation forest cultivation. The objects of the study were white poplar stands in Ukrainian forests grown on the area of more than 7,600 hectares in various natural zones, namely Polissya (forest zone in Ukraine), Forest-Steppe, and Steppe. The study was carried out based on the analysis of forest inventory data (Ukrainian forest fund database) containing given stand characteristics such as origin, age, diameter, height, type of forest site conditions, etc. The characteristics were estimated by grouping the plots by age. The growth specificities (dynamics of the main mensuration characteristics) and the productive capacity of the white poplar stands were analyzed based on the developed tables. It was found that white poplar stands are mainly concentrated in Steppe and Forest-Steppe in Ukraine. The stands are of coppice or artificial origin; they grow in moist fairly fertile, fresh fairly fertile and moist fertile sites. The age distribution of the white poplar stands is severely imbalanced due to a significant predominance of stands aged over 40 years in all natural zones within Ukraine. More productive are the white poplar stands growing within Polissya and Forest-Steppe. The developed growth and productivity tables should be used when planning and prioritizing the relevant forestry interventions in white poplar stands.

scholarly journals USE OF FOREST SITE CAPACITY BY FORESTS OF UKRAINE

2018 ◽  
pp. 3-12 ◽  
Author(s):  
V. P. Tkach ◽  
O. V. Kobets ◽  
M. G. Rumiantsev
Keyword(s):  
Steppe Zone ◽  
Pine Forests ◽  
Management Systems ◽  
Forest Steppe ◽  
Forest Site ◽  
Left Bank ◽  
Forest Types ◽  
Natural Zones ◽  
The Right ◽  
Common Oak

The forest site capacity using was quantitatively assessed for the stands of the main forest-forming species of Ukraine, Scots pine and common oak, taking into account natural zones and forest types. The tables of productivity of modal and highly productive pine and oak stands have been developed. It has been found that the stands use an average of 50–75 % of the forest site capacity of lands. The average weighted value of the capacity used by pine forests was 68–76 % in the Polissya zone, 70–78 % and 68–73 % in the Right-bank and Left-bank Forest-Steppe zones respectively, and 54–78 % in the Steppe zone. For oak stands, the value was 71–75 % and 63–71 % for the Right-bank and Left-bank Forest-Steppe zones respectively and 65–75 % for the Steppe zone. The basis for increasing the productivity of forests was confirmed to be the differentiation of forest management systems and individual forestry activities on a zonal and typological basis.

scholarly journals Geochemical differentiation of atmospheric aerosols in natural zones of European Russia

2021 ◽  
Vol 906 (1) ◽  
pp. 012048
Author(s):  
Tatiana Kuderina ◽  
Otto Chkhetiani ◽  
Arseni Kudikov ◽  
Maria Artamonova
Keyword(s):  
Atmospheric Aerosols ◽  
Environmental Changes ◽  
Chemical Elements ◽  
Agricultural Landscapes ◽  
European Russia ◽  
Russian Plain ◽  
Forest Steppe ◽  
Anthropogenic Landscapes ◽  
Forest Zone ◽  
Natural Zones

Abstract Climate and environmental changes on Earth have become modern challenges to humanity. The main factor affecting the landscapes of Russia is an increase in air temperature and a decrease in precipitation. Because of these processes, the amount of aerosols in the near-ground atmosphere of the landscapes of the ETR (European territory of Russia) increases. The aim of the study is to determine the atmogeophysical and atmogeochemical indicators that reveal the interaction of the atmosphere and the diversity of natural landscapes in European Russia. Landscape-geochemical research methods make it possible to study geosystems with the participation of all landscape components and actual migration processes, especially the atmospheric migration of chemical elements. To determine the modern atmogeochemical existence, field comprehensive studies of the potential emission of matter in all natural zones of the ETR were carried out submeridionally - in the landscapes of the steppe, forest-steppe, forest and tundra zones of the ETR. The research results show that in the submeridional profile, the mass concentration of aerosols decreases regularly from south to north, the minimum concentrations of atmospheric aerosols are observed in the forest zone, in the tundra there was a slight increase due to anthropogenic landscapes and the influence of the sea. Analysis of the chemical composition of aerosols revealed that, among the elements of global importance, aluminosilicates naturally increase to the south of the ETR as elements of clay minerals that are widespread in the Russian Plain. The maximum phosphorus content occurs in the residential area with agricultural landscapes. Sulfur concentrations are confined to the semiarid zone of the ETR, then decrease in the forest zone and increase again in the technogenic regions and the tundra belt of the Kola Peninsula, surrounded by the sea. The concentrations of chemical elements of regional and local distribution in atmospheric aerosols are more differentiated on the ETR and depend on the natural and technogenic features of each region. Thus, heavy metals are more common in the Plain territories of the forest-steppe and forest zones of the ETR and are confined to the bedrock and technogenic sources. High concentrations of calcium and strontium are associated with areas of weathering of carbonate rocks. In general, increased concentrations of atmospheric aerosols with an increased content of anthropogenic elements are observed during the western and southern transport of air masses. At the same time, the amount of rainstorm precipitation increases when these aerosols act as condensation nuclei. To assess the current state of the atmosphere at the ETR, it is necessary to continue field measurements and organize European annual and seasonal geochemical monitoring at stationary observation points.

scholarly journals AN ANALYSIS OF FOREST GROWTH FEATURES OF LOW-PRODUCTIVE GREY FOREST SANDY SOILS OF UKRAINE WITH REGARD TO THEIR RELEVANCE FOR FOREST CULTIVATION

2019 ◽  
Vol 7 ◽  
pp. 943-948
Author(s):  
Peter Kijovský ◽  
Anatoliy Lisnyak ◽  
Kateryna Utkina ◽  
Alexey Kraynukov ◽  
Eva Michaeli
Keyword(s):  
Sandy Soils ◽  
General Characteristic ◽  
Forest Growth ◽  
Forest Steppe ◽  
Forest Site ◽  
Soil Quality Indicators ◽  
Physical Clay ◽  
Natural Zones ◽  
Physico Chemical ◽  
Growth Features

A comparative analysis of the forest growth features of low-productive grey forest sandy soils of the Polissia, the Forest-Steppe and the Northern Steppe of Ukraine was performed. Although grey forest soils from different natural zones are distinguished in the genesis of their soil rocks, as well as typical and zonal belongings, at the same time they are united by an important general characteristic, light texture, determining the similarity of physical, physico-chemical and agrochemical indicators and, in general, forest site capacity. A package of markers to assess the forest site capacity of sandy soils (pine habitats) with such soil quality indicators as the content of physical clay, the coarseness of the humified layer of soil profile and K2O content was revealed.

Influence of foliar fertilization of plants with humid preparations on the productivity of spring barley in the Eastern Forest-Steppe of Ukraine

2021 ◽  
Vol 2020 (1-2) ◽  
pp. 63-72
Author(s):  
V.Y. Bukhalo ◽  
G.I. Sukhova
Keyword(s):  
Grain Yield ◽  
Spring Barley ◽  
Field Research ◽  
Barley Grain ◽  
Forest Steppe ◽  
Barley Plant ◽  
Foliar Fertilization ◽  
Current State ◽  
Growth Stimulant ◽  
Plant Growth Stimulants

The article analyzes the current state and improvement of elements of the technology of growing valuable forage and food crops, spring barley in Ukraine. It is noted that in recent years the area under large crops and the yield of this crop have decreased significantly. It is emphasized that further improvement of technologies should be focused on the transition to more use of biological agents to increase yields. Researchers have shown that the effectiveness of the use of humid preparations GK-6M, GK-4MK, GK-MK - on crops of spring barley Dokuchaivsky 15, due to foliar feeding of plants in the tiller ring phase. The main justification of the article is the results of field research conducted in 2015–2019. Maximum indicators, namely: increase in leaf area by 46–38 %, stem height by 8,3 cm; the number of grains in the ear – 4,8 pieces; ear lengths – 1,9 cm; mass of grain in the ear – 0,33 g; masses of 1000 grains – at 12,0 %; nature of grain – 34,9 g – was obtained by treating plants with humid preparation GK-6M. Foliar feeding of plants in the tiller ring phase with the studied drugs provided the largest increase in the yield of spring barley grain – 1,08 t/ha, provided the use of growth stimulant GK-6M. A slightly smaller effect of foliar fertilization of plants on the yield of spring barley was observed from the growth stimulator GK-4MK – the increase in grain yield was 0,83 t/ha and from the growth stimulant GK-MK – the increase in grain yield – 0,66 t/ha. The obtained increments are significant, mathematically proven. Further improvement of agrotechnologies due to wider use of biological means of increase of productivity and quality of production is offered. Keywords: spring barley, plant growth stimulants, foliar feeding, yield.

Current state and resilience of three main tree species in southern Germany with regard to drier and hotter weather conditions over the past 50 years

2021 ◽  
Author(s):  
Annette Debel ◽  
Achim Bräuning
Keyword(s):  
Tree Species ◽  
Summer Precipitation ◽  
Weather Conditions ◽  
Deciduous Tree ◽  
Response Analysis ◽  
Climate Modelling ◽  
Forest Site ◽  
Southern Germany ◽  
The Past ◽  
Current State

<p>Latest drought events and their already visible damage to trees highlight the crucial need to assess the current state and resilience of forest ecosystems in southern Germany. However, commonly applied dendroclimatic approaches rarely take into account, how weather patterns affecting trees are modified by topographic conditions. For this purpose, three main tree species were studied at three low mountain ranges and three corresponding basins in the topographically complex province of Bavaria (southeast Germany). A response analysis between climate proxies and tree-ring widths was used to investigate climate-growth relationships over the past 50 years of both coniferous and deciduous tree species at each forest site. Temporal stability of tree responses to climate was compared for two 25-year periods to detect possible modifications in climate-growth correlations. A pointer year analysis was also conducted to analyze tree response to climatic extreme events. The results showed that Scots pine (<em>Pinus sylvestris</em>) was the most vulnerable and least drought-resistant of the investigated tree species. Although Norway spruce (<em>Picea abies</em>) and European beech (<em>Fagus sylvatica</em>) benefited from an extended growing season at high elevation sites, they showed higher drought sensitivity over the past 25 years. Beech responses were rather inhomogeneous and even differed in the optimal precipitation period. However, lower correlation coefficients for summer precipitation at the driest site may indicate the ability of beech to adapt to less summer precipitation. Nevertheless, increasing drought frequency, as predicted, poses a serious threat to all studied tree species, including even the colder and more humid sites. Hence, to more accurately estimate risk potentials under future weather conditions, we will combine dendroclimatological results with climate modelling scenarios, particularly expected future frequencies of critical weather types on the local scale.</p>

Organic Matter of Cultural Layers as a Material for Radiocarbon Dating

Radiocarbon ◽  
2017 ◽  
Vol 59 (6) ◽  
pp. 1931-1944 ◽  
Author(s):  
E Zazovskaya ◽  
V Shishkov ◽  
A Dolgikh ◽  
A Alexndrovskiy ◽  
V Skripkin ◽  
...  
Keyword(s):  
Organic Matter ◽  
Southern Taiga ◽  
Archaeological Sites ◽  
Forest Steppe ◽  
Human Occupation ◽  
Natural Zones ◽  
European Part Of Russia ◽  
Cultural Layers ◽  
Closed Systems ◽  
Physical Stabilization

ABSTRACTThis article focuses on radiocarbon (14C) dating of the organic matter (OM) of natural-anthropogenic objects—the cultural layers (CLs) of archaeological sites. Using examples from three ancient sites located within the European part of Russia, in southern taiga and forest-steppe natural zones, we demonstrate approaches to the interpretation of 14C dating of OM derived from the organomineral material of the CLs studied. We use the term “archaeological humus” as defined as the OM formed within the CL from “anthropogenic matter” (i.e., organic residues that were produced during the past human occupation of the site) without or with negligible contribution of OM inherited from pre-anthropogenic stages of pedogenesis. The archaeological humus is formed within closed or semi-closed systems by the processes of humification and physical stabilization of OM. The use of hierarchical (from macro- to submicro-) morphological investigations at one of the sites (Gnezdovo) combined with 14C dating allowed conclusions to be drawn about the age of formation of different OM components in CLs.

Contrasting current and potential productivity and the influence of fire and species composition in the boreal forest: a case study in eastern Canada

2015 ◽  
Vol 45 (5) ◽  
pp. 541-552 ◽  
Author(s):  
Rija Rapanoela ◽  
Frédéric Raulier ◽  
Sylvie Gauthier ◽  
Hakim Ouzennou ◽  
Jean-Pierre Saucier ◽  
...  
Keyword(s):  
Black Spruce ◽  
Relative Difference ◽  
Minimum Size ◽  
Forest Site ◽  
Productive Capacity ◽  
Large Area ◽  
Site Factors ◽  
Eastern Canada ◽  
Potential Productivity ◽  
Forest Management Planning

The capacity of a forest stand to produce timber is related to the interactions that exist between its regeneration capacity, physical site characteristics (climate, surficial deposit, drainage), and disturbances. Minimally, to be sustainably managed, a forest needs to be sufficiently productive and able to regenerate after a disturbance so that its productive capacity is maintained or enhanced. To this effect, we evaluated timber productivity over a large area (175 000 km2) covering the latitudinal extent of closed-canopy black spruce (Picea mariana (Mill.) B.S.P) forest. Site index and relative density index were used to identify stands that cannot reach a minimum volume of trees of minimum size over one rotation. A nonparametric method was used to estimate their values for all stands within the study area. This imputation used either physical site attributes alone to assess potential productivity independent of stand history or physical and vegetation site attributes to assess current productivity. The proportion of productive stands was then estimated at the scale of landscapes ranging from 39 to 2491 km2. Physical site factors alone explain 84% of the variability in the percentage of potentially productive stands (78% for currently productive stands); their combination resulted in an abrupt transition in productivity over the study area. However, burn rate alone also explains 63% of variation in the proportion of currently productive stands and 41% of the relative difference between percentages of potentially or currently productive stands. These results have implications for strategic forest management planning at land classification stage, as timber production area is assumed to remain stable through time, whereas it is apparently related to the disturbance rate.

Long-Term Soil Productivity: genesis of the concept and principles behind the program

2006 ◽  
Vol 36 (3) ◽  
pp. 519-528 ◽  
Author(s):  
Robert F Powers
Keyword(s):  
United States ◽  
Monitoring Program ◽  
The United States ◽  
Research Network ◽  
Professional Judgment ◽  
Soil Productivity ◽  
Forest Site ◽  
Productive Capacity ◽  
Potential Productivity

The capacity of a forest site to capture carbon and convert it into biomass defines fundamental site productivity. In the United States, the National Forest Management Act (NFMA) of 1976 mandates that this capacity must be protected on federally managed lands. Responding to NFMA, the USDA Forest Service began a soil-based monitoring program for its managed forests. Lacking an extensive research base, soil-based standards were predicated largely on professional judgment. To provide a stronger foundation, a national program of Long-Term Soil Productivity (LTSP) research was established. The LTSP program addresses both short- and long-term consequences of site and soil disturbance on fundamental forest productivity. Research centers on two key properties affecting a site's long-term productive capacity, site organic matter and soil porosity, each of which is readily influenced by management. A coordinated research network of more than 100 field installations in the United States and Canada is examining how pulse changes in these properties affect soil processes supporting vegetative growth and potential productivity. Results from installations with ≥5 years of response were presented on the 10th anniversary of LTSP, and the latest findings are assembled here. This paper describes the evolution of the study and the characteristics of the oldest field installations.

scholarly journals Zonal and Zoogeographic Characteristic of the Ant Fauna (Hymenoptera, Formicidae) of Ukraine

2011 ◽  
Vol 45 (6) ◽  
pp. e-30-e-39 ◽  
Author(s):  
A. Radchenko
Keyword(s):  
Steppe Zone ◽  
Forest Steppe ◽  
Forest Zone ◽  
Geographical Regions ◽  
Essential Heterogeneity

Zonal and Zoogeographic Characteristic of the Ant Fauna (Hymenoptera, Formicidae) of UkraineOne hundred fourty ant species belonging to 38 genera of 5 subfamilies are known to occur in Ukraine nowadays. All the species are attributed to 16 zoogeographic complexes that are grouped into three faunogenetic classes. Comparative zonal and zoogeographical analysis of the fauna of different geographical regions of Ukraine has revealed their essential heterogeneity. The ant fauna of the Forest-Steppe zone is not original. At the same time, it is not transitive between the faunae of the Forest and Steppe zones. Ant fauna of the Forest-Steppe is related to those not the Steppe but the Forests zones, and the Forest-Steppe can be included in the southern subzone of a Forest zone of t Europe.

scholarly journals Incidence of ash dieback in the Left-Bank Forest-Steppe depending on stand characteristics

2020 ◽  
pp. 157-164
Author(s):  
V. L. Meshkova ◽  
V. L. Borysova
Keyword(s):  
Stocking Density ◽  
Site Index ◽  
Stand Age ◽  
Forest Steppe ◽  
Forest Site ◽  
Left Bank ◽  
Site Conditions ◽  
Ash Dieback ◽  
European Ash ◽  
Stand Characteristics

The incidence of ash dieback in the forest-steppe part of Sumy and Kharkiv Regions was analysed taking into account the type of forest site conditions, the stand age, relative stocking density, site index class and the proportion of European ash in the stand composition. Ash dieback is quite widespread in inspected stands of the Left-Bank Forest-Steppe of Sumy and Kharkiv Regions. The disease spreads similarly in natural and artificial stands. It was more often revealed in the fresh fertile forest site conditions, however, such forest site conditions are the most spread and the most favourable for European ash. It was found that ash dieback incidence tends to grow with a stand aging and lasts up to the stand’s age of 80. It can be explained by the development of stem and collar rots which occur later. Ash dieback incidence is the highest in the stands with 40–70 % of ash in their composition, at a relative density of stocking over 0.5 in the stands of different site index classes.

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