scholarly journals Utjecaj intenziteta prorjeda na rast azijske bukve (Fagus orientalis Lipsky) u plantažama u Trabzonu na sjeveroistoku Turske

2019 ◽  
Vol 143 (5-6) ◽  
pp. 231-240
Author(s):  
Ayhan Usta ◽  
Ibrahim Turna ◽  
Esengül Genc ◽  
Yavuz Okunur Kocamanoglu ◽  
Selvinaz Yilmaz ◽  
...  
Keyword(s):  
Basal Area ◽  
Average Diameter ◽  
Average Height ◽  
Sample Plot ◽  
Fagus Orientalis ◽  
Thinning Intensity ◽  
Diameter Increment ◽  
Oriental Beech ◽  
Fagus Orientalis Lipsky ◽  
Area And Volume

In this study, the effects of first thinnings having different intensities in oriental beech (Fagus orientalis Lipsky) plantation areas were investigated in terms of diameter and height growth of trees. Sample plots were chosen from oriental beech plantation areas which are within the boundaries of Maçka–Yeşiltepe and Vakfıkebir districts of Trabzon province, Turkey. With removing of 0%, 10%, 25% and 40% of basal area in a hectare of stands which are in sapling stage, sample plots were established by applying thinnings which are in four different intensities (control, light, moderate, strong). After the thinning applications, basal areas were calculated by measuring diameters and heights of trees in established sample plots in order to reveal stand growth. The effects of thinnings were revealed related to some stand characteristics (average diameter, basal area, average height, relative diameter increment, etc.) and determined chosen trees. The effect of thinning intensity on average diameter, basal area, and volume values is statistically important in every two plantations. 2-year results showed that thinning increased the diameter increment significantly, and the increase in diameter increment was positively correlated with the thinning intensity in both experiments. Moreover, increments of diameter, height, basal area, and volume were higher in Maçka-Yeşiltepe experiment than in Vakfıkebir experiment. But, the values of moderate and strong thinning intensities applied in Vakfıkebir were close to each other. When all the results are evaluated, application of strong thinning intensity for Yeşiltepe sample plot, the moderate thinning intensity for Vakfıkebir sample plot is seen appropriate by us in terms of both stand development.

scholarly journals Effects of heavy thinnings on the increment and selection of trees for tending in Norway spruce monoculture in natural hazard conditions

2017 ◽  
pp. 31-54
Author(s):  
Martin Bobinac ◽  
Sinisa Andrasev ◽  
Andrijana Bauer-Zivkovic ◽  
Nikola Susic
Keyword(s):  
Norway Spruce ◽  
Growth Stage ◽  
Natural Hazard ◽  
Basal Area ◽  
Growth Potential ◽  
Stand Age ◽  
Diameter Increment ◽  
Volume Increment ◽  
Selection Of ◽  
Area And Volume

The paper studies the effects of two heavy selection thinnings on the increment of Norway spruce trees exposed to ice and snow breaks in eastern Serbia. In a thinning that was carried out at 32 years of age, 556 candidates per hectare were selected for tending, and at the age of 40, of the initial candidates, 311 trees per hectare (55.9%) were selected as future trees. In all trees at 41-50 age period, diameter increment was higher by 31%, basal area increment by 64% and volume increment by 67% compared to 32-40 age period. The collective of indifferent trees is significantly falling behind compared to future trees in terms of increment values in both observed periods. However, the value of diameter, basal area and volume increments, of the collective of "comparable" indifferent trees are lower in comparison to the values of increments of future trees by 10-15% in the 32-40 age period, and by 15-21% in the 41-50 age period and there are no significant differences. The results show that heavy selective thinnings, initially directed at a larger number of candidates for tending at stand age that does not differ much from the period of carrying out first "commercial" thinnings, improve the growth potential of future and indifferent trees, where it is rational to do the tree replacement for the final crop in "susceptible" growth stage to snow and ice breaks.

Natural regeneration of oriental beech (Fagus orientalis Lipsky) trees in canopy gaps and under closed canopy in a forest in northern Iran

2017 ◽  
Vol 29 (4) ◽  
pp. 1075-1081 ◽  
Author(s):  
Nasrin Nasiri ◽  
Mohammad R. Marvie Mohadjer ◽  
Vahid Etemad ◽  
Kiomars Sefidi ◽  
Leila Mohammadi ◽  
...  
Keyword(s):  
Natural Regeneration ◽  
Canopy Gaps ◽  
Northern Iran ◽  
Fagus Orientalis ◽  
Oriental Beech ◽  
Fagus Orientalis Lipsky ◽  
Closed Canopy

Pit and mound influence on soil features in an Oriental Beech (Fagus orientalis Lipsky) forest

2013 ◽  
Vol 133 (2) ◽  
pp. 347-354 ◽  
Author(s):  
Yahya Kooch ◽  
Claudio Zaccone ◽  
Norbert P. Lamersdorf ◽  
Giustino Tonon
Keyword(s):  
Fagus Orientalis ◽  
Oriental Beech ◽  
Soil Features ◽  
Fagus Orientalis Lipsky

Forest Edge Effects on Seedlings in Mixed Oriental Beech (Fagus orientalis Lipsky) - Scots Pine (Pinus sylvestris L.) Stands

2018 ◽  
Author(s):  
Osman Topaçoğlu ◽  
Emre Genç
Keyword(s):  
Scots Pine ◽  
Basal Area ◽  
Forest Edge ◽  
Height Growth ◽  
Forest Edges ◽  
Seedling Density ◽  
Oriental Beech ◽  
Pine Seedlings ◽  
Fagus Orientalis Lipsky ◽  
Stand Basal Area

Forest edges created by silvicultural treatment influence micro-climatic conditions and available light in forest stands. Studies regarding the impacts of forest edges on regeneration is limited in mixed Oriental beech (Fagus orientalis Lipsky)-Scots pine (Pinus sylvestris L.) stands. In this study, the influences of forest edges on height growth, root-collar diameter (RCD) growth and density of seedlings in an adjacent stand of Oriental beech-Scots pine were observed. In addition, the effects of stand basal area and height-to-crown base (HCB) on height growth, RCD growth and seedlings density were monitored. The study was conducted within Samatlar Forest Planning Directorate, in Kastamonu city, Turkey. In the selected Oriental beech-Scots pine stand, twenty-five transects were installed perpendicular to the forest edge, and all the measurements were taken within these transects. There were statistically significant relationships between the distance from the forest edge and the growth of Scots pine seedlings (p<0.05), while the stand edge did not have any effect on the growth of Oriental beech seedlings. Density of Scots pine seedlings decreased, while Oriental beech seedling density increased from the edge into the intact stand (p<0.05). Stand basal area and HCB did not significantly change from the edge into the intact stand (p>0.05). The differences in seedling growth and seedling density between the two species can be associated with their dissimilar tolerance to shade. The initial results obtained in this study point out the importance of forest edges on the regeneration of Oriental beech and Scots pine seedlings. Data suggest that regeneration of mixed Oriental beech-Scots pine should be successful using group methods rather than traditional shelterwood method within entire stand.

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