scholarly journals Comparison of Scots pine growth dynamics in Polissya and Steppe zone of Ukraine

2021 ◽  
Vol 67 (No. 11) ◽  
pp. 533-543
Author(s):  
Viktoriia Lovynska ◽  
Andriy Terentiev ◽  
Petro Lakyda ◽  
Svitlana Sytnyk ◽  
Olexander Bala ◽  
...  
Keyword(s):  
Scots Pine ◽  
Growth Models ◽  
Average Diameter ◽  
Steppe Zone ◽  
Site Index ◽  
Average Height ◽  
Regression Equations ◽  
Pine Stands ◽  
The Difference ◽  
Biometric Indices

The goal of the study was to compare the dynamic changes in individual biometric indices of Scots pine in different natural zones of Ukraine, Polissya and Steppe. Scots pine stands were mainly concentrated in the Polissya zone, and their area was 3.6 times larger than that of forests in the Steppe zone, and the total wood stock by 4.6 times. The regression equations for biometric indices of artificial modal stands were developed. A comparison of the average height, diameter, and wood stock for pine stands of site index І<sup>а</sup>, I, and II growing in Polissya and Steppe was made. It was found that the average differences in the average height (from 1.9 to 2.6 m) are observed at the age of 15–20 years. For the average diameter, the difference increases with age and the growth of the site index. The difference in the average stock is constantly increasing with age. At the age of 20 years this difference is 20–30 m<sup>3</sup>, and at the age of 120 years from 100 to 120 m<sup>3</sup> depending on the site index. The developed growth models can be used in planning and prioritizing appropriate forestry activities for pine stands growing in specific regional conditions.

scholarly journals The influence of different thinning methods on dominance coefficients of future crop trees in even-aged Scots pine stands

2014 ◽  
Vol 75 (1) ◽  
pp. 31-45
Author(s):  
Tadeusz Zachara
Keyword(s):  
Scots Pine ◽  
Average Diameter ◽  
Long Term Effect ◽  
Pine Stands ◽  
The Difference ◽  
1960S And 1970S ◽  
Poor Site ◽  
Thinning Effect ◽  
Scots Pine Stands

Abstract The research aim was to evaluate the influence of different thinning methods on future crop tree growth. Investigations were conducted on permanent Scots-pine experimental plots, established in 1960s and 1970s in Kozienice, Łąck, Parciaki and Janów Lubelski Forest Districts. To assess the response to thinning of future crop trees, their dominance coefficients were used. These are defined as quotients for each given future crop tree diameter and average stand diameter (WP1), the average dominant layer diameter (WP2) and the average diameter of 100 thickest trees per hectare (WP3). The difference between each coefficient value at the beginning and at the end of the measurement period was used as a measure of the thinning effect. On Kozienice, Łąck and Parciaki plots the differences between treatments were significant, especially in the period after first thinning. The increase of WP3 coefficient occurred in a case of strong thinning - TS1 and TS2. On plot Parciaki also the moderate thinning TU1 and TU2 had a significant influence on change of this coefficient. On plot Janów Lubelski the influence of treatment has not been stated in the first 5-year period but in the next one. Analyses of changes in the dominance coefficients confirmed the hypothesis that the WP3 coefficient is very useful as it is the most stable indicator of future crop-tree position in a stand. On Kozienice, Łąck and Parciaki plots the significant differences between treatments were stated, especially in the period after first thinning. The influence of thinning treatment on the plot Janów Lubelski was not considered for the first 5-year period but in the next one. All reactions to thinning were slower on this plot, possibly because of the relatively poor site conditions. This was a long-term effect. The results obtained suggest that very intense thinning of Scots pine stands should only be implemented under a restricted set of conditions - in healthy, not neglected, forest stands. Classical moderately-selective thinning is preferable to intense thinning and is the most convenient option for pine stands

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 Spatial distribution of losses in growth of trees caused by the feeding of pine shoot beetles Tomicus piniperda and T. minor (Col., Scolytidae) in Scots pine stands growing within range of the influence of a timber yard in southern Poland

2012 ◽  
Vol 52 (No. 3) ◽  
pp. 130-135 ◽  
Author(s):  
A. Borkowski
Keyword(s):  
Spatial Distribution ◽  
Scots Pine ◽  
Basal Area ◽  
Tomicus Piniperda ◽  
Pine Trees ◽  
Pine Stands ◽  
The Difference ◽  
High Level ◽  
Pine Shoot Beetles ◽  
Scots Pine Stands

This study deals with the assessment of increment losses in Scots pine trees caused by the maturation feeding of pine shoot beetles Tomicus piniperda (L.) and T. minor (Hart.) (Col., Scolytidae) in even-aged stands growing during their entire life span within range of the influence of a sawmill and its timber yard. In spring 2004, on three sample plots, 0.2 ha in size, situated 60, 200, and 500 m from the yard, height and dbh of all trees were measured and increment cores were taken from randomly selected sample trees. An agreement between the spatial distribution of losses in tree increments and the distribution of damage to crowns of investigated stands indicated that the losses resulted from the maturation feeding of pine shoot beetles migrating from the sawmill timber yard. Divergence of growth in the about 25-years-old stand indicated the beginning of intensive feeding of beetles in pine shoots with a high level of probability. In comparison with the control stand the basal area losses in stands growing 60 and 200 m from the beetle source amounted to 57% and 46%, respectively. The difference in the height of trees was as large as almost 100%.

scholarly journals Health condition of the Scots pine (Pinus sylvestris) in Kampinos National Park – preliminary studies

2016 ◽  
Vol 58 (4) ◽  
pp. 240-245
Author(s):  
Łukasz Tyburski ◽  
Paweł Przybylski
Keyword(s):  
Scots Pine ◽  
National Park ◽  
Average Diameter ◽  
Good Health ◽  
Health Condition ◽  
Forest Monitoring ◽  
Average Height ◽  
Crown Condition ◽  
Tree Crowns ◽  
Pine Trees

Abstract In 2015 in Kampinos National Park (KNP), monitoring of tree crown condition was conducted in specimens of the Scots pine, which is the dominant tree species in the park (73.3%). The monitoring was aimed at providing information about the health of pine trees in the national park area. The monitoring was conducted on 26 plots throughout the park. The stands where the pine is not a dominant species were omitted. On each plot, 20 trees were subjected to assessment. In total, 520 pine trees were examined. The monitoring was conducted by the assessment of tree crowns based on the adapted forest monitoring methodology conducted as part of National Environmental Monitoring. On the basis of the monitoring, it was found that 75.4% of the trees are characterised by slight defoliation and 94.4% of the specimens were not found to have discoloration of the assimilation apparatus. No differences were found between areas situated closer and further from the administrative borders of Warsaw. On the basis of the monitoring, it was found that the pine trees in KNP are in a good health condition. Dendrometric measurements show that the average diameter at breast height (DBH) of the analysed trees is 26.6 cm. The average height of the trees is 20.4 m. The average age of the examined tree stands is 84. The monitoring will be continued in subsequent years in order to record the changes taking place in tree crowns.

scholarly journals The influence of soil texture on the site index of Scots pine stands in south-west Poland

2011 ◽  
Vol 72 (4) ◽  
pp. 311-319
Author(s):  
Piotr Sewerniak
Keyword(s):  
Scots Pine ◽  
Soil Texture ◽  
Site Index ◽  
South West ◽  
Pine Stands ◽  
Scots Pine Stands

Wpływ uziarnienia gleby na bonitację drzewostanów sosnowych w południowo-zachodniej Polsce

Regional Height Growth Models for Scots Pine in Poland

2020 ◽  
Author(s):  
Jarosław Socha ◽  
Luiza Tymińska-Czabańska ◽  
Stanisław Zięba ◽  
Dominika Cywicka ◽  
Paweł Hawryło
Keyword(s):  
Scots Pine ◽  
Growth Models ◽  
Site Index ◽  
Height Growth ◽  
Growth Patterns ◽  
Natural Forest ◽  
Growth Trajectories ◽  
Regional Models ◽  
Site Productivity ◽  
Forest Regions

Abstract Background: Site productivity remains a fundamental concern in forestry as a significant driver of resource availability. The site index (SI) reflects the overall impact of all environmental parameters that determine tree height growth and is the most commonly used indirect proxy for forest site productivity estimated using stand age and height. One of the most critical challenges in the site index (SI) concept are local variations in climate, soil, and genotype-environmental interactions that lead to variable height growth patterns among ecoregions and cause inappropriate estimation of site productivity. Developing regional models can solve this problem and allow us to determine forest growth and SI appropriately.Results: Therefore, the purpose of this study was to develop regional height growth models (RMs) for the Scots pine in Poland. For height growth modelling, we used the growth trajectory data of 855 sample trees, representing the entire range of geographic locations and site conditions of the Scots pine in Poland. Collected growth trajectories were used for the development of the global height growth model (GM) for Poland and RMs for six natural forest regions, which were adopted as the spatial unit for the model regionalisation. Height prediction errors by the global model were found to be significantly larger than those obtained with regional models in all regions. The results showed significant differences between growth trajectories in natural forest regions I, II, and III located in northern Poland compared to stands in natural forest regions IV, V, and VI in southern Poland.Conclusions: The presented study showed differences in height growth patterns of Scots pines in Poland and revealed that the use of local models could improve the growth prediction and quality of the SI estimation. Developed RMs show better fit statistics and predictive validity than the GM developed for the countrywide scale. Differences in climate and soil conditions which distinguish natural forest regions affect height growth patterns of Scots pine. Therefore, extending this research to models which directly describe the interactions of height growth with site variables, such as climate, soil properties, and topography, can provide additional valuable forest management information.

scholarly journals Actualization of growth parameters of vegetative origin Oak stands of the Ukrainian forest-steppe zone

2020 ◽  
Vol 11 (2) ◽  
pp. 53-65
Author(s):  
Y. Yu. Khan ◽  
О. P. Bala
Keyword(s):  
Growth Parameters ◽  
Growth Models ◽  
Objective Assessment ◽  
Steppe Zone ◽  
Forest Growth ◽  
Forest Steppe ◽  
Growth Modelling ◽  
Study Results ◽  
Biometric Indices ◽  
Vegetative Origin

Sustainable forest management, which based on the balance of ecological, economic and social aspects, requires a continuous updating and developing tools of objective assessment of the current state and further prediction changes of all elements of the forest ecosystem. Currently, questions related to the forecasting in the forestry is very important for actualization the databases in cases when using the continuous forest inventory. Vegetative origin oak stands play an important role in forming natural ecosystems in the Ukrainian forest-steppe zone. They represent 26 percent of all oak stands area, and, therefore, the question related to the growth modelling of biometric indices will be important in the future. The purpose of this research was to develop the growth models based on yield tables for the main biometric indices, such as: mean height, mean diameter, cross-sectional area per 1 ha and growing stock per 1 ha. Growth models for forecasting all specified biometric indices was based on the ratio of biometric index for the year ahead to the same index now taken from the forest growth tables for modal vegetative origin oak stands across dynamical site classes and the geographical location. The description of the obtained results was based on the lognormal density distribution function. The main parameters of mathematical models for the forecasting biometric indices were set using the nonlinear regression function via the IBM SPSS statistics software. Graphical and analytical methods were used for comparing the study results and analysing the obtained data. As a result of the study, the coefficients of the equation were obtained, which with sufficient accuracy describe the studied relations and forecasting the growth of stands according to the main biometric indices in the different age intervals. The deviation of growth modelling results for the main biometric indices, exhibit acceptable levels when compared to yield tables for vegetative origin Oak stands of the Ukrainian forest-steppe zone during all forecasting period and in percentage values are less than 1%, but for forecasting the stock per 1 ha for young forests the deviation can approach 4%. The forecasting period should preferably not exceed 10-15 years.

Growth and yield of modal scots pine stands in the Chornobyl exclusion zone

2020 ◽  
Vol 11 (4) ◽  
Author(s):  
R. D. Vasylyshyn ◽  
O. A. Slyva
Keyword(s):  
Forest Management ◽  
Mathematical Models ◽  
Scots Pine ◽  
Forest Ecosystems ◽  
Exclusion Zone ◽  
Study Region ◽  
Pine Stands ◽  
Forest Typology ◽  
Biometric Indices ◽  
Scots Pine Stands

In the Chornobyl Exclusion Zone, Scots pine stands, which cover an area of over 80,000 hectares, perform an important environmental function, in particular, they serve as a significant natural factor influencing the regional carbon balance of the region’s forest ecosystems. The efficiency of production of this function significantly depends on the balance of management decisions regarding forest management and rational use of forest resources within radiation-contaminated areas. The information base for ensuring sustainable forest management, including monitoring of radionuclide migration in forest ecosystems of the Exclusion zone, is represented by a set of reference and information support, an important component of which are yield tables for modal stands. In order to supplement this complex with information on the peculiarities of Scots pine stands growth, mathematical models of dynamics of biometric indices are proposed and forest typology-based yield tables of modal pine stands of Chernobyl Exclusion Zone are developed within this work. The information basis of the research is presented by information from the database of IA “Ukrderzhlisproekt”, which contains the biometric assessment characteristics of Scots pine stands in the study region, as well as data from 18 temporary sample plots. In course of modelling, power and exponential growth functions were used. As a result, mathematical models of mean height, mean diameter, sum of basal area, growing stock and total productivity of pine stands of the studied region are proposed. These mathematical dependences serve as a basis for the development of forest typology-based yield tables for modal Scots pine stands. In particular, yield tables for modal pine stands growing in dry infertile pine sites, fresh infertile pine sites, fresh fairly infertile pine-oak sites, moist fairly infertile pine-oak sites and moist fairly fertile hornbeam-oak-pine sites are proposed. The developed mathematical models describe the dynamics of biometric indices for more than 90 % of the area of Scots pine stands in the study region.

Sign in / Sign up

Export Citation Format

Share Document