Báo cáo lâm nghiệp: "Variability in density of spruce (Picea abies [L.] Karst.) wood with the presence of reaction wood" potx
Báo cáo lâm nghiệp: "Changes in the mycorrhizal status of some mountain spruce forests" potx
... 82–88 in Růžová hora the average decrease was 0.70 g, in Sněžka 0.81 g (Fig. 5).Changes in the parameters within the years 2004–2006Data on mycorrhizal status of roots obtained from spring ... approximately in the same distance (about 1 m) from the stem of five selected trees. e cylinder of the soil probe used for this purpose had the inner diameter of 6 cm and the height (depth of space ... indicate the stabilized mycorrhizal state. Positive changes in the total increase of macromycetes diversity as well as the apparent increase of percentage of macromyce-tes can be seen in the studied...
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Báo cáo lâm nghiệp: "Multivariate statistical approach to comparison of the nutrient status of Norway spruce (Picea abies [L.] Karst.) and top-soil properties in differently managed forest stands" potx
... 526/03/H036.Multivariate statistical approach to comparison of the nutrient status of Norway spruce (Picea abies [L.] Karst.) and top-soil properties in differently managed forest standsP. S1, ... 1992). Norway spruce (Picea abies [L.] Karst.) is the main edificator and stand-forming tree species in mountain spruces stands of Central Europe. e timberline is running quite near the Praděd ... analysis of variance (MANOVA) was applied. CLU and MANOVA were used to evaluate the close-ness of the nutrient status of the spruce stands and to assess the closeness of chemical properties of the...
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Báo cáo lâm nghiệp: "Variability in density of spruce (Picea abies [L.] Karst.) wood with the presence of reaction wood" potx
... remarkable increase in wood density along the stem radius in all the models. In the CW zone, the increase is more distinct in the first 40 years of growth, then the wood density stagnates. In the other ... trend when density increases with the increasing percentage of compression wood in the sample. When there is 10% of compression wood in the total area of the sample front, the wood density is ... expand the know- ledge of the properties of Norway spruce (Picea abies [L.] Karst.) wood with the presence of reac-tion wood. J. FOR. SCI., 53, 2007 (3): 129–137 133e in uence of the radius...
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Báo cáo lâm nghiệp: "Changes in air quality in different phases of forest management process in a sub-mountain beech ecosystem (West Carpathian Mts.)" pdf
... 2/0045/08, and by the Slovak Research and Development Agency, Contract No. APVV-0102-06.Changes in air quality in different phases of forest management process in a sub-mountain beech ecosystem (West ... ecosystem (West Carpathian Mts.)D. KInstitute of Forest Ecology, Slovak Academy of Sciences, Zvolen, SlovakiaABSTRACT: We studied air quality in a sub-mountain beech ecosystem in the Kremnické ... intervention was evident on all plots – indicating the absence of connection with the individual phases of forest management process, but at the same time indicating the presence of climate change. In...
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Báo cáo lâm nghiệp: "Current possibilities of using Norway spruce (Picea abies [L.] Karst.) in forest regeneration in the air-polluted region of the northeastern Krušné hory Mts" doc
... possibilities of using Norway spruce (Picea abies [L.] Karst.) in forest regeneration in the air-polluted region of the northeastern Krušné hory Mts.P. K, O. MFaculty of Forestry and ... parts of the stands) than in the Krušné hory Mts. (with underplanting realized inside the stands) was also a reason for the relative failure of underplanting in the existing spruce stands in the ... Results show that the growth of Norway spruce in the Krušné hory Mts. on these groups of forest types is identical to that on GFT 7K in the Krušné hory Mts. or on GFT 6K in the Bohemian-Mora-vian...
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Báo cáo lâm nghiệp: "Variability of spruce (Picea abies [L.] Karst.) compression strength with present reaction wood" pdf
... Variability of spruce (Picea abies [L.] Karst.) compression strength with present reaction woodV. G, H. VFaculty of Forestry and Wood Technology, Mendel University of Agriculture ... the compression strength of fresh spruce is (44%) higher than that of normal wood.e objectives of this paper are to find out the lim-its of compression strength parallel to grain of spruce ... corresponds to the data for the compression wood of spruce (Picea abies) with 12% of moisture content published by G (2002) and H et al. (2003). e higher strength of compression wood is caused...
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Báo cáo lâm nghiệp: "Merocoenoses of cambioxylophagous insect fauna of Norway spruce (Picea abies [L.] Karst.) with focus on bark beetles (Coleoptera: Scolytidae) and types of tree damage in different gradation conditions" ppsx
... Norway spruce (Picea abies [L.] Karst.) with focus on bark beetles (Coleoptera: Scolytidae) and types of tree damage in diff erent gradation conditionsE. K1, W. Z21Faculty of Forestry ... merocoenosis of cambioxylophagous insect fauna associated with stems of standing spruce trees attacked by bark beetles, in the merocoeno-sis of trees aff ected by fungal tree pathogens, light-ning and ... diversity of cambioxylophagous and wood-inhabiting insects (33), but only 18 species were more abundant. Considering the frequency of occurrence of cambioxylophagous insects in standing trees...
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Báo cáo lâm nghiệp: "Red deer density in the air-polluted area of forest ecosystems in the Krušné hory" pdf
... in the research area, mean values of the estimate of the red deer population density were deter-mined in the Jelení hora hunting district in 2007 and 2008 using the FSC method, viz 24 ± 23 individuals·km–2 ... (2): 59–63 59JOURNAL OF FOREST SCIENCE, 57, 2011 (2): 59–63Red deer density in the air-polluted area of forest ecosystems in the Krušné hory Mts.– Klášterec nad Ohří Forest DistrictZ. V, ... EDepartment of Forest Protection and Wildlife Management, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech RepublicABSTRACT: The density of red deer in the area of forest...
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Báo cáo lâm nghiệp: "Extended length rotation to integrate timber and pine nut production with the conservation of structural diversity in a Pinus pinea (L.) forest" pdf
... rotation to integrate timber and pine nut production with the conservation of structural diversity in a Pinus pinea (L.) forestFernando M a *,MaríaJ.H´b, Rafael C a ,IsabelC˜ a aCIFOR-INIA, ... lag cen-tred at d ,andz(u a )andz(u a +d) are the values that the variablez takes at samplesu a and u a + d. The experimental variogram and fitted model for the site index and age of the stand ... likely of the four rot risk classes as a function, for each fixed basalarea, of the age and the dominant height of the stand, obtainingfor each value of basal area a graphic similar to the one...
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Báo cáo lâm nghiệp: "Variability of cutting regimes in small private woodlots of south-western France" pot
... edge of P-1).The regeneration of the stands is always natural (shoot +seedling); no planting was identified in the woodlots studied.Clearing, thinning of seedlings, early thinning and pruningwere ... particu-larly concerning the density of the maintained standards, butwere often in the framework of a cordial relationship. Cutting regimes in small forest 927[20] Giudici F., Zingg A., Sprouting ability ... bequalified as being “less sustainable”. Indeed the site’s nativespecies are maintained and varied species of standards are in general left at the time of each cutting operation, which main-tains a balance...
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Báo cáo lâm nghiệp: "Variability in Populus leaf anatomy and morphology in relation to canopy position, biomass production, and varietal taxon" docx
... 10.1051/forest:2007029Original articleVariability in Populus leaf anatomy and morphology in relation to canopy position, biomass production, and varietal taxonNajwa AL Aa,NicolasMa,b, Reinhart Ca*aUniversity ... determines leaf display, leaf distribu-tion and canopy density, and therefore in uences light inter-ception [27]. It has been demonstrated that the main factorgiving rise to the high leaf area index ... 32,53]. Twoof the main factors limiting productivity during the growingseason are the time necessary to reach maximal leaf area and the ability to maintain leaf area [39]. According to Ridge et al.[57]...
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Báo cáo lâm nghiệp: "Nodulation in vitro et étapes précoces de l’infection rhizobienne chez Acacia albida (syn Faidherbia albida)" ppt
... Oxford. Article originalNodulation in vitro et étapes précoces de l’infection rhizobienne chez Acacia albida (Del) (syn Faidherbia albida) YK Gassama/DiaDépartement de biologie végétale, ... l’étude des stades précoces de l’infection rhizobienne, des prélèvements de racines infectées ont été effectués 10 puis 15 japrès l’inoculation, sur de jeunes plants d Acacia albida ... de 2 semaines environ) et des nodulesmatures (4 semaines et au-delà).RÉSULTATSEffet de la date de l’inoculationCinétique de la nodulationEn suivant la cinétique de...
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Báo cáo khoa học: "The growth of spruce (Picea abies (L) Karst) in the Krkonoše-(Giant) Mountains as indicated by ring width and wood density" docx
... Original article The growth of spruce (Picea abies (L) Karst) in the Krkonoše-(Giant) Mountains as indicated by ring width and wood densityC SanderD EcksteinJ ... reveal any grouping of the sites,slope chronologies for tree -ring width and latewood density were built. In table I, the statistics of both the ring width and the den-sity ... summarized.Tree -ring width The mean ring width of all trees investigatedwas 1.42 mm on the southern slope and 1.57 mm on the northern slope. Up to the 1960s, the trees on...
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Báo cáo lâm nghiệp: "Variability of initial growth, water-use efficiency and carbon isotope discrimination in seedlings of Faidherbia albida (Del.) A. Chev., a multipurpose tree of semi-arid Africa. Provenance and drought effect" doc
... to semi-arid regions [37]. Mature trees of Faidherbia albida are famous for their [19] Ismail A. M., Hall A. E., Inheritance of car-bon isotope discrimination and water-use ... A. , LoustauD. and Ferhi A. , Genetic and environmentaldeterminants of water-use efficiency and car-bon isotope discrimination in forest trees, in: Sandermann H., Bonnet-Masimbert ... Lemane I., Gambo S., Trial of nine Acacia albida provenances in Dosso,Niger, in: Vandenbeldt R.J. (Ed.), Faidherbia albida in the West African Semi-Arid Trop-ics: Proceedings...
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Báo cáo lâm nghiệp: "Variability of stomatal conductance in the crown of a maritime pine (Pinus pinaster Ait.)" pps
... of the day. Variation in vapor deficitand irradiance explained only 33% of the variation of gs. No stratification could beshown in the crown at any time of the day.Soil ... In the pre-drought period, the stomatal response to air water vapor deficit andirradiance explains 52% of the total gsvariation; gs decreases as D increases,and increases ... features explained 75% of the total variation of g,.During the drought period, the meanand variance of gs were much lower andshowed only a slight decrease during the course...
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