scholarly journals About phytopathological and histological aspects of Norway spruce dieback in the Orlické hory Mts.

2012 ◽  
Vol 51 (No. 8) ◽  
pp. 348-358 ◽  
Author(s):  
M. Čermák ◽  
M. Martinková ◽  
D. Palovčíková ◽  
L. Jankovský
Keyword(s):  
Air Pollution ◽  
Risk Factor ◽  
Norway Spruce ◽  
Mineral Nutrition ◽  
Meteorological Factors ◽  
Winter Period ◽  
Pathogenic Species ◽  
Spruce Stands ◽  
Pathogenic Agents ◽  
Increased Susceptibility

The condition was evaluated of tissues of declining young spruce stands in selected localities of the Orlick&eacute; hory Mts. It refers to stands occurring in top parts affected by an air pollution disaster in the last century. Several types of damage of a different symptomatic character were distinguished. A high NO<sub>x</sub>&nbsp;input appears to be the risk factor of spruce dieback in the Orlick&eacute; hory Mts. One of the main causes in the complex of factors is the unbalanced cause of meteorological factors during the year and unbalance in mineral nutrition. The result is decrease in lignification, immaturity of tissues before the winter period and increased susceptibility of damaged tissues to parasites. Several potentially pathogenic species of micromycetes have been identified which can be considered to be significant pathogenic agents in case of declining spruce in the Orlick&eacute; hory Mts., however, not a main cause. &nbsp;

scholarly journals The effect of liming on the mineral nutrition of the mountain Norway spruce (Picea abies L.) forest

2009 ◽  
Vol 55 (No. 1) ◽  
pp. 1-8 ◽  
Author(s):  
J. Kulhavý ◽  
I. Marková ◽  
I. Drápelová ◽  
S. Truparová
Keyword(s):  
Norway Spruce ◽  
Mineral Nutrition ◽  
Anthropogenic Activities ◽  
Natural Conditions ◽  
Healthy Development ◽  
Al Content ◽  
The Past ◽  
Spruce Stands ◽  
Calcium Magnesium ◽  
Uptake Of Nutrients

Mineral nutrition represents the uptake, transport, metabolism and utilization of nutrients by the forest stand. These processes influence all physiological functions of trees. A specific minimum amount of all nutrients is necessary for the healthy development and growth of forest trees. The uptake of nutrients is influenced not only by natural conditions but also by anthropogenic activities. During the period of 2000–2005 the mineral nutrition of mountain Norway spruce stands was studied at the study site Bílý Kříž (Moravian-Silesian Beskids Mts., Czech Republic). Research was carried out in a spruce stand that was limed in the past years (in 1983, 1985 and 1987) and in a spruce stand that was not limed in order to compare the liming effect on the mineral nutrition of spruce stands. A positive liming effect was detected in the calcium, magnesium and phosphorus nutrition because their contents in current needles were higher on the limed plots. No liming effect was determined in the nitrogen, potassium and microelement (Fe, Mn, Cu, Zn, Al) content in current needles. Sufficient nutrition of spruce stands only with calcium was recorded on all studied plots.

scholarly journals Current possibilities of using Norway spruce (Picea abies [L.] Karst.) in forest regeneration in the air-polluted region of the northeastern Krušné hory Mts.

2009 ◽  
Vol 55 (No. 8) ◽  
pp. 376-386
Author(s):  
P. Kubík ◽  
O. Mauer
Keyword(s):  
Air Pollution ◽  
Picea Abies ◽  
Norway Spruce ◽  
Damage Zone ◽  
White Birch ◽  
Large Area ◽  
Pollution Damage ◽  
Spruce Stands ◽  
Acidic Sites ◽  
Air Pollution Damage

The paper analyses possibilities of repeated use of Norway spruce (<I>Picea abies</I> [L.] Karst.) in the regeneration of existing Norway spruce stands, in the regeneration of large-area clearcuts, and in the reconstruction of the stands of substitute tree species (European white birch [<I>Betula verrucosa</I> Ehrh.]) after a change in the emission situation in the northeastern Krušné hory Mts., comparing the prosperity of these plantations with plantations in the unpolluted Bohemian-Moravian Upland. The survey included 26 research plots aged 1–12 years, situated predominantly on acidic sites in Forest Altitudinal Vegetation Zones (FAVZ) 6 and 7 in the northeastern Krušné hory Mts. (air pollution damage zones A and B) and 6 control plots aged 4–11 years on acidic sites of FAVZ 6 in the Bohemian-Moravian Upland (air pollution damage zone C). Total number of parameters and traits assessed in each tree was up to 14. Research results indicate that the current pollution and climatic situation in the Krušné hory Mts. allow a switch to the classical spruce management system of higher elevations. The best method of regeneration is seen in small-size regeneration elements – clearcuts of up to 1 ha. The spruce can also be used on large-area clearcuts, but it suffers from a long transplanting shock and frost injuries there. All plantations must be protected against game damage.

scholarly journals Imitated Whole Tree Harvesting Show Negligible Effect on Economic Value of Spruce Stands

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 841
Author(s):  
Iveta Desaine ◽  
Annija Kārkliņa ◽  
Roberts Matisons ◽  
Anna Pastare ◽  
Andis Adamovičs ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Economic Value ◽  
Forest Types ◽  
Spruce Stands ◽  
The Difference ◽  
Growing Conditions ◽  
Whole Tree Harvesting ◽  
Whole Tree ◽  
Tree Harvesting

The increased removal of forest-derived biomass with whole-tree harvesting (WTH) has raised concerns about the long-term productivity and sustainability of forest ecosystems. If true, this effect needs to be factored in the assessment of long-term feasibility to implement such a drastic forest management measure. Therefore, the economic performance of five experimental plantations in three different forest types, where in 1971 simulated WTH event occurred, was compared with pure, planted and conventionally managed (CH) Norway spruce stands of similar age and growing conditions. Potential incomes of CH and WTH stands were based on timber prices for period 2014–2020. However, regarding the economics of root and stump biomass utilization, they were not included in the estimates. In any given price level, the difference of internal rate of return between the forest types and selected managements were from 2.5% to 6.2%. Therefore, Norway spruce stands demonstrate good potential of independence regardless of stump removal at the previous rotation.

scholarly journals A Novel Approach to Evaluate the Effect of Neighboring Trees and the Orientation of Tree Social Area on Stem Radial Increment of Norway Spruce Trees

Forests ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 163
Author(s):  
Jan Světlík ◽  
Jan Krejza ◽  
Pavel Bednář
Keyword(s):  
Norway Spruce ◽  
Tree Growth ◽  
Growth Models ◽  
Explanatory Power ◽  
Radial Increment ◽  
Important Indicator ◽  
The Czech Republic ◽  
Novel Approach ◽  
Spruce Stands ◽  
Social Area

Tree growth depends on many factors such as microsite conditions, vitality, and variations in climate and genetics. It is generally accepted that higher growth indicates both an economic benefit and better vitality of any tree. Here we use a modified approach of evaluating tree social area to study mutual tree competition based on the orientation and shape of trees social area. The investigation was performed in nine Norway spruce stands in the Czech Republic. The objective of this study performed from 2008 to 2012 was to quantify relative tree radial increments with respect to the lowest and highest competition found in specific sectors of tree social area (AS). Specific groups of trees (tree classes) were evaluated according to their classes (dominant, co-dominant and sub-dominant) and their composition status in ninety-degree sectors of AS using established classifying rules. The results showed that a spatially-available area (AA) is an inappropriate parameter for predicting tree growth, whereas AS provided robust explanatory power to predict relative radial growth. Tree size was observed as an important indicator of relative radial increments. A significantly positive correlation was found for a radial increment of sub-dominant trees with the lowest competition from western directions; whereas a negative correlation was observed when the lowest competition was observed from eastern directions. For dominant trees, there was an evident growth reaction only when more than 50% of the AS was oriented towards one of the cardinal points. Individual differences in the orientation of tree AS may be important parameters with regard to competition and its spatial variability within an area surrounding a particular tree and deserve more detailed attention in tree growth models and practice.

scholarly journals Air Quality Assessment in the State of Kuwait during 2012 to 2017

Atmosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 678
Author(s):  
Adeeba Al-Hurban ◽  
Sawsan Khader ◽  
Ahmad Alsaber ◽  
Jiazhu Pan
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Meteorological Factors ◽  
Ambient Air ◽  
The State ◽  
Ambient Air Pollution ◽  
Northeast Monsoon ◽  
Residential Areas ◽  
Industrial Areas ◽  
The State Of Kuwait

This study aimed to examine the trend of ambient air pollution (i.e., ozone (O3), nitrogen monoxide (NO), nitrogen dioxide (NO2), nitrogen oxides (NOx), sulfur dioxide (SO2), carbon monoxide (CO), benzene (C6H6) and particulate matter with an aerodynamic diameter smaller than 10 microns (PM10), and non-methane hydrocarbons (NMHCs) at 10 monitoring stations located in the main residential and industrial areas in the State of Kuwait over 6 years (2012–2017). We found that the SO2 level in industrial areas (0.065 ppm) exceeded the allowable range of SO2 in residential areas (0.030 ppm). Air pollution variables were defined by the Environmental Public Authority of Kuwait (K-EPA). In this study, integrated statistical analysis was performed to compare an established air pollution database to Kuwait Ambient Air Quality Guidelines and to determine the association between pollutants and meteorological factors. All pollutants were positively correlated, with the exception of most pollutants and PM10 and O3. Meteorological factors, i.e., the ambient temperature, wind speed and humidity, were also significantly associated with the above pollutants. Spatial distribution mapping indicated that the PM10 level remained high during the southwest monsoon (the hot and dry season), while the CO level was high during the northeast monsoon (the wet season). The NO2 and O3 levels were high during the first intermonsoon season.

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