Template-Type: ReDIF-Article 1.0
Author-Name: R. Podlaski
Author-Workplace-Name: Cwiêtokrzyski National Park, Scientific and Research Laboratory, Bodzentyn, Poland
Title: Relationship between crown characteristics and the radial increment of beech (Fagus sylvatica L.) in the Świętokrzyski National Park (Poland)
Abstract: The objectives of this study are to determine the relationship between crown characteristics and the radial increment of beech (Fagus sylvatica L.) and to specify the characteristics of beech trees with the radial increment above the average in the Świętokrzyski National Park. The following relationships have been found: the radial increment of beech increases as the degree of the freedom of the light part of the crown from neighbouring trees increases, and the increase in the relative crown length causes a significant increase in the radial increment. Most of the best growing beech trees are characterized by the light part of the crown confined in an area of up to about 55%, and the relative crown length spanning the range of 55% (trees 61 to 80 years of age at b.h.) to 76% (trees 21 to 40 years of age at b.h).
Keywords: Fagus sylvatica, type of top, crown deformation, crown freedom, defoliation, relative crown length, radial increment, thinning, Świętokrzyski National Park
Journal: Journal of Forest Science
Pages: 93-99
Volume: 48
Issue: 3
Year: 2002
DOI: 10.17221/11860-JFS
File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11860-JFS.html
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Handle: RePEc:caa:jnljfs:v:48:y:2002:i:3:id:11860-JFS

Template-Type: ReDIF-Article 1.0
Author-Name: I. Štefančík
Author-Workplace-Name: Forest Research Institute, Zvolen, Slovak Republic
Author-Name: L. Štefančík
Author-Workplace-Name: Forest Research Institute, Zvolen, Slovak Republic
Title: Assessment of long-term tending in mixed stands of spruce, fir and beech on research plot Korytnica
Abstract: The paper deals with problems of thinnings in a mixed stand (spruce-fir-beech) situated in the sixth altitudinal forest zone. Three of the five investigated plots were tended by free crown thinning for a long time, and two were left without any planned silvicultural treatments as control. Dynamic changes in tree species composition, stand structure, qualitative and quantitative production were evaluated for a period of 30 years. The changes were compared with respect to differences between the plot with long-term silvicultural treatments and the control plots (without treatments).
Keywords: mountain forests, thinnings, mixed stands, spruce - fir - beech
Journal: Journal of Forest Science
Pages: 100-114
Volume: 48
Issue: 3
Year: 2002
DOI: 10.17221/11862-JFS
File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11862-JFS.html
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Handle: RePEc:caa:jnljfs:v:48:y:2002:i:3:id:11862-JFS

Template-Type: ReDIF-Article 1.0
Author-Name: V. Benetka
Author-Workplace-Name: Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Prùhonice, Czech Republic
Author-Name: K. Vacková
Author-Workplace-Name: Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Prùhonice, Czech Republic
Author-Name: I. Bartáková
Author-Workplace-Name: Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Prùhonice, Czech Republic
Author-Name: M. Pospíšková
Author-Workplace-Name: Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Prùhonice, Czech Republic
Author-Name: M. Rasl
Author-Workplace-Name: Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Prùhonice, Czech Republic
Title: Introgression in black poplar (Populus nigra L. ssp. nigra) and its transmission
Abstract: : Introgression was studied in the offspring of P. nigra and P. × canadensis female trees using 3 enzymatic patterns (6-PGD, LAP and GPI). Our investigations were aimed at the offspring from open pollination and controlled pollination by the pollen mixture from 3 clones of P. nigra and 3 clones of P. × canadensis. The rate of introgression in P. nigra offspring from open pollination was 0.67%. Introgression in 3 offsprings of P. nigra from controlled pollination was 7.14%. In P. × canadensis the heterozygous: homozygous phenotype ratio in 2 offsprings from open pollination was 1:1; it documents prevailing fertilization by P. nigra pollen. After fertilization by the pollen mixture this segregation ratio was 1:1 (6-PGD; GPI) or 3:1 (LAP). The offspring of P. × canadensis maternal components are assumed to have a major share in introgression.
Keywords: introgression, open pollination, controlled crossing, Populus nigra L. ssp. nigra, Populus × canadensis Moench
Journal: Journal of Forest Science
Pages: 115-120
Volume: 48
Issue: 3
Year: 2002
DOI: 10.17221/11863-JFS
File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11863-JFS.html
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Handle: RePEc:caa:jnljfs:v:48:y:2002:i:3:id:11863-JFS

Template-Type: ReDIF-Article 1.0
Author-Name: L. Musil
Author-Workplace-Name: Czech Agricultural University, Faculty of Forestry, Prague, Czech Republic
Author-Name: V. Pavlíček
Author-Workplace-Name: Czech Agricultural University, Faculty of Forestry, Prague, Czech Republic
Title: Liming of forest soils: effectiveness of particle-size fractions
Abstract: The paper studies the effect of a single use of a textural fraction of dolomitic limestone (5.1 t per ha) on soil reaction (pH/KCl and pH/H2O) and the content of exchangeable Ca and Mg (in the soil layer of 0-30 cm or in F, H and A horizons) during a 6-year experiment under a mature Norway spruce stand and a 4-year experiment on a clear-felled area. The increase in pH culminated in the 3rd or in the 3rd-6th year of the experiment. Maximum effects were achieved applying the fine fraction of a particle size £ 1 mm. The coarse fraction of a particle size > 1 mm showed virtually negligible effects. The increase in Ca and Mg content culminated in the last 6th year of the experiment. Maximum effects were achieved applying fine fractions again. The effect of the coarse fraction was also virtually negligible. After 6 years, ma-ximum increase in all values under study occurred in the upper narrow F horizon while the increase rapidly dropped downwards.
Keywords: forest liming, dolomitic limestone, particle-size fractions, acidity, nutrients
Journal: Journal of Forest Science
Pages: 121-129
Volume: 48
Issue: 3
Year: 2002
DOI: 10.17221/11864-JFS
File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11864-JFS.html
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Handle: RePEc:caa:jnljfs:v:48:y:2002:i:3:id:11864-JFS

Template-Type: ReDIF-Article 1.0
Author-Name: K. Střelcová
Author-Workplace-Name: Technical University, Forestry Faculty, Department of Natural Environment, Zvolen, Slovak Republic
Author-Name: F. Matejka
Author-Workplace-Name: Technical University, Forestry Faculty, Department of Natural Environment, Zvolen, Slovak Republic
Author-Name: J. Minďáš
Author-Workplace-Name: Technical University, Forestry Faculty, Department of Natural Environment, Zvolen, Slovak Republic
Title: Estimation of beech tree transpiration in relation to their social status in forest stand
Abstract: The results of sap flow continuous measurements by a tree-trunk heat balance method (THB) on beech model trees are analysed in this paper. Experimental research works were carried out in a mature mixed fir-spruce-beech stand in the research area Poľana - Hukavský grúň (j= 48o39´, l = 19o29´, H = 850 m a.s.l.) in UNESCO Biosphere Reserve on two co-dominant and one sub-dominant beech trees. A mathematical model of daily transpiration dynamics was proposed for a quantitative analysis of the daily course of sap flow intensity. The model works on a one-tree level and enables to consider the influence of the tree social position in the stand on the sap flow intensity of model beech trees and to express the dependence of sap flow intensity on the tree height and crown projection.
Keywords: Fagus sylvatica (L.), heat balance method, mathematical model SVAT, micrometeorological conditions, dendrometric parameters of trees
Journal: Journal of Forest Science
Pages: 130-140
Volume: 48
Issue: 3
Year: 2002
DOI: 10.17221/11865-JFS
File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11865-JFS.html
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Handle: RePEc:caa:jnljfs:v:48:y:2002:i:3:id:11865-JFS