scholarly journals Effects of different phosphorus fertilisers on the nutrient status and growth of Scots pine stands on drained peatlands

Silva Fennica ◽  
1999 ◽  
Vol 33 (3) ◽  
Author(s):  
Klaus Silfverberg ◽  
Markus Hartman
Keyword(s):  
Scots Pine ◽  
Nutrient Status ◽  
Pine Stands ◽  
Scots Pine Stands

scholarly journals Complex study of foliage nutrient status in ash fertilized Scots pine stands in Lithuania

2008 ◽  
Vol 54 (No. 5) ◽  
pp. 195-206 ◽  
Author(s):  
I. Varnagirytė-Kabašinskienė
Keyword(s):  
Scots Pine ◽  
Nitrogen Fertilization ◽  
Nutrient Status ◽  
Wood Ash ◽  
Nutrient Composition ◽  
Nutrient Concentrations ◽  
Response Evaluation ◽  
Critical Levels ◽  
Pine Stands ◽  
Scots Pine Stands

In Lithuania, a typical Scots pine stand under the influence of wood ash and nitrogen fertilization, containing different treatments and the control, was analyzed. The study aim was to interpret the foliage and soil analyses, and to find possible indications in the soil-plant relation in the stand. The analyses of the foliage nutrient status in the Scots pine stand when wood ash with/without N was recycled to the forest showed that the significance analyses of changes in the nutrient composition in the soil and needles were the best initial tool for the response evaluation. The comparison of the nutrient concentrations with optimal amounts, critical levels of deficiency or target levels for ratios to N, and applied graphical analyses, could also provide possible indications in the soil-plant relation.

Effects of crown reduction on needle nutrient status of scleroderris-canker-diseased and green-pruned Scots pine

1993 ◽  
Vol 23 (6) ◽  
pp. 1169-1178 ◽  
Author(s):  
Heikki Nuorteva ◽  
Timo Kurkela
Keyword(s):  
Scots Pine ◽  
Elemental Concentration ◽  
Nutrient Status ◽  
The Other ◽  
Crown Length ◽  
Pine Stands ◽  
Nutritional Disturbances ◽  
Needle Loss ◽  
Scots Pine Needles ◽  
Scots Pine Stands

The effects of green crown reduction (needle loss) on the nutrient status of needles were studied in Scots pine (Pinussylvestris L.) in Finland. Trees were either diseased with scleroderris canker (Gremmeniellaabietina (Lagerb.) Morelet) or had been green pruned. The concentrations of 15 different elements were determined in needles collected in March 1987 from 120 trees in six young Scots pine stands. Four of the stands had suffered from scleroderris canker over the last 10 years, whereas the other two stands were healthy and had been pruned about 2 years before sampling. To eliminate the effects of soil and environmental factors, sample trees were chosen in pairs. Each pair contained one tree with a severely reduced crown (about a 50% reduction in crown length as a result of disease or pruning) and an adjacent tree (control) with an unaffected crown. Compared with the control trees, concentrations of foliar B, Ca, N, and S were significantly higher in both diseased and pruned trees, while Mn was higher only in diseased trees and Na and Cu, only in pruned trees. Foliar Fe and Mg concentrations were lower in diseased trees than in control trees. In many stands there was a significant correlation between needle element concentrations and severity of crown reduction, suggesting that differences in foliar elemental concentration in Scots pine needles depend on the extent of crown reduction. This phenomenon should be considered when interpreting foliar analyses of recently defoliated conifers, particularly before conclusions are made about the need for fertilization, nutritional disturbances, or the effects of air pollution.

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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