scholarly journals Simulations on the effects of timber harvesting and forest management on the nutrient cycle and productivity of Scots pine stands.

Silva Fennica ◽  
1987 ◽  
Vol 21 (2) ◽  
Author(s):  
Seppo Kellomäki ◽  
Matti Seppälä
Keyword(s):  
Forest Management ◽  
Scots Pine ◽  
Timber Harvesting ◽  
Nutrient Cycle ◽  
Pine Stands ◽  
Scots Pine Stands

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.

Typology of the natural regeneration in a middle-aged Scots pine forest

1988 ◽  
Vol 53 ◽  
Author(s):  
C. De Schepper
Keyword(s):  
Scots Pine ◽  
Natural Regeneration ◽  
Free Field ◽  
Sandy Soils ◽  
Structural Basis ◽  
Pedunculate Oak ◽  
Pine Stands ◽  
Scots Pine Forest ◽  
Forest Practice ◽  
Scots Pine Stands

The  study describes the natural regeneration state of a forest on coarse sandy  soils. The natural regeneration was studied in three different ecological  conditions: in 30 to 60 year old Scots pine stands, in a 62 year old mixed  stand of pedunculate oak and red oak, and on the free field.     The analysis of the regeneration groups revealed that the first settler  maintained a dominant social position during the following years after the  settlement. The structural basis is consequently laid out early. This means  that the forest practice has to consider the very first phase of the  regeneration as determining for the following evolution of the regeneration  groups.

An analysis of a spontaneous ingrowth of deciduous trees in 70 year old stands of Scots pine

1987 ◽  
Vol 52 ◽  
Author(s):  
N. Lust
Keyword(s):  
Scots Pine ◽  
Red Oak ◽  
Deciduous Trees ◽  
Pedunculate Oak ◽  
Black Cherry ◽  
Height Distribution ◽  
Stem Number ◽  
Pine Stands ◽  
Spontaneous Regeneration ◽  
Scots Pine Stands

In 70  years old homogeneous Scots pine stands, bordered by a hardwood belt, an  analysis was made about the spontaneous ingrowth of natural seedlings. The  analysis involved especially the following points: species and stem number,  influence of the hardwood belts, diameter and height distribution, age,  growth and structure. From the age of 30 years, a spontaneous regeneration of  hardwoods established in Scots pine stands. There are on average 7,000 plants  per ha, 80 % of which are black cherry and another fair number are red oak  and pedunculate oak. The regeneration has an average age of 25 to 30 years,  it is uneven aged, contains several diameter and height classes and has  already partially penetrated the upper stratum.     The spontaneous ingrowth allows to convert in a simple way the homogeneous  coniferous stands into mixed hardwood stands.

scholarly journals Bayesian calibration, comparison and averaging of six forest models, using data from Scots pine stands across Europe

2013 ◽  
Vol 289 ◽  
pp. 255-268 ◽  
Author(s):  
M. van Oijen ◽  
C. Reyer ◽  
F.J. Bohn ◽  
D.R. Cameron ◽  
G. Deckmyn ◽  
...  
Keyword(s):  
Scots Pine ◽  
Bayesian Calibration ◽  
Forest Models ◽  
Pine Stands ◽  
Using Data ◽  
Scots Pine Stands

scholarly journals Belowground biomass models for young oligotrophic Scots pine stands in Latvia

2018 ◽  
Vol 11 (2) ◽  
pp. 206-211 ◽  
Author(s):  
L Kenina ◽  
A Bardulis ◽  
R Matisons ◽  
R Kapostins ◽  
A Jansons
Keyword(s):  
Scots Pine ◽  
Belowground Biomass ◽  
Biomass Models ◽  
Pine Stands ◽  
Scots Pine Stands

scholarly journals Parameters of Pinus sylvestris health condition and Ips acuminatus population in pure and mixed stands of Sumy region

2020 ◽  
pp. 131-140
Author(s):  
Valentyna Meshkova ◽  
Ivan Bobrov
Keyword(s):  
Scots Pine ◽  
Bark Beetles ◽  
Forest Health ◽  
Health Condition ◽  
State Enterprise ◽  
Forest Steppe ◽  
Population Parameters ◽  
Mixed Stands ◽  
Pine Stands ◽  
Scots Pine Stands

Outbreaks of bark beetles have increased in recent years in various regions. Pine engraver beetle (Ips acuminatus (Gyllenhal, 1827); Coleoptera: Curculionidae: Scolytinae) is most common in the pine forests of many European countries. Research on its biology and spread carried out in different natural conditions, phases of pest outbreak and considered various parameters to characterize the population of the pest and forest health condition. The aim of the research was to compare the health condition of Scots pine stands and population parameters of I. acuminatus in its two generations in pure and mixed stands in Polissya and Forest-steppe parts of Sumy region. Research was carried out in 2017 in the pure Scots pine stands and mixed stands with Scots pine and other forest species in Polissya (State Enterprise "Seredyno-Budsky Agroforest Economy"; State Enterprise "Seredyno-Budsky Forest Economy") and Forest-steppe parts (State Enterprise "Velykopysarivske Agroforest Economy"; State Enterprise "Okhtyrske Forest Economy") of Sumy region at 26 sample plots. In sample plots, parameters of forest health condition and bark beetle population were assessed in June and in September, after completion of development of spring and summer generation of I. acuminatus.  By most of the parameters assessed, significant differences between sample plots in Forest-Steppe and Polissya parts of Sumy region were not found. In pure Scots pine stands the mean area of bark beetles’ foci and bark beetles’ production were larger in Forest-steppe in June, and the density of Ips acuminatus nuptial chambers in June and September. In pure Scots pine stands the area of I. acuminatus focus, the number of colonized trees, the proportion of recently died trees, health condition indices, the density of egg galleries and nuptial chambers as well as young beetle’s production increased from June to September. In mixed stands the focus area, the number of colonized trees and health condition index increased insignificantly, and population parameters of I. acuminatus decreased from June to September. Pure Scots pine stands changed the health condition from "severely weakened" to "drying up" in three months, and mixed ones remained in the "weakened" category. In pure pine stands, the density of egg galleries and beetles of the young generation increased for three months from the lower limit of a moderate level to a high level, the density of nuptial chambers – from low to a high level. In mixed stands, all population parameters of I. acuminatus correspond to a low population level. The parameters characterizing the investigated foci of I. acuminatus in the Sumy region significantly correlated with the participation of pine in the stand composition, and in September the correlation is closer than in June. The data obtained indicate the feasibility of creating predominantly mixed pine stands.

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