Effect of long-term fertilization on the biomass production and nutrient status of Scots pine stands

1991 ◽  
Vol 27 (1) ◽  
pp. 113-127 ◽  
Author(s):  
E. M�lk�nen ◽  
M. Kukkola
Keyword(s):  
Biomass Production ◽  
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.

Below- and above-ground biomass, production and nitrogen use in Scots pine stands in eastern Finland

2002 ◽  
Vol 165 (1-3) ◽  
pp. 317-326 ◽  
Author(s):  
Heljä-Sisko Helmisaari ◽  
Kirsi Makkonen ◽  
Seppo Kellomäki ◽  
Esko Valtonen ◽  
Eino Mälkönen
Keyword(s):  
Biomass Production ◽  
Scots Pine ◽  
Above Ground Biomass ◽  
Nitrogen Use ◽  
Ground Biomass ◽  
Pine Stands ◽  
Scots Pine Stands ◽  
Eastern Finland

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.

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

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.

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