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Báo cáo lâm nghiệp: "Effects of selective thinning on growth and development of beech (Fagus sylvatica L ) forest stands in south-eastern Slovenia" docx

Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Effects of selective thinning on growth and development of beech (Fagus sylvatica L.) forest stands in south-eastern Slovenia" docx

... types of selective thinning have been studied, such as group selective thinning [22], and the consequences of early and late thinning [18, 23].Classical selective thinning according to Schädelin ... smaller number of crop (selected) trees in the first thinning and thinning intensities, taking account of economical factors [46, 51]. In Slovenia, selective thinning is the main type of thin-ning ... types of thinning used in forest tending are low (frombelow) and high (from above) thinning. In low thinning, onlysuppressed trees are removed, whereas high thinning removesdominant and co-dominant...
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Báo cáo lâm nghiệp: "Effects of microsite variation on growth and adaptive traits in a beech provenance trial." pps

... spa-tial arrangement of blocks used was very ineffi cient in handling the microenvironmental variation with- in the trial site. All blocks are clearly heterogeneous with respect to all environmental ... variation within populations and/ or environmental variation on very small scales.Analysis of covariance confi rmed the expected signifi cant provenance eff ect on all traits (Table 2). Generally, ... discoloration was scored on 6 dates, again dispersed over the whole season, using a 5-stage scale (1 – green leaves, 2 – beginning of autumn colouring of individual leaves, 3 – beginning of...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Effects of drought and heat on forest insect populations in relation to the 2003 drought in Western Europe" ppt

... region did notmaterialize. Conversely, exceptionally high population levels of the beech woolly aphid, Phyllaphis fagi L. were observed in 2004 (Fig. 2) following a period of latency of several ... level or population increase; (+ +) = important but local damages or no changes in population level; ( +) = local damages with low population level; ( ) = populationdecrease; (n) = no data available; ... nutritional quality of plants,positively by increasing the level of foliar nitrogen which may, in turn, stimulate insect feeding [60,97], or negatively throughlow leaf water content and increased...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Effects of the clear-cutting of a Douglas-fir plantation (Pseudotsuga menziesii F.) on the chemical composition of soil solutions and on the leaching of DOC and ions in drainage waters" pps

... Effects of clear-cutting on soil solutions and ecosystem functioning In the soil upper layers, ZTL and TL solutions changed in different ways: the concentration of elements in ZTL solutionsstrongly ... collected: (i) gravitational solutionsusing zero-tension plate lysimeters (ZTL) made up of polyethylenebecause they are the solutions really drained out of the soil, and, (ii) capillary solutions ... Evolution of Mg2+concentration (in µmolc L −1 ) for gravitational solutions collected under the forest- floor,before and after clear-cutting (vertical line).Figure 3. Evolution of NO3−(in...
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Báo cáo lâm nghiệp: "Effects of soil mechanical treatments combined with bramble and bracken control on the restoration of degraded understory in an ancient beech forest" pptx

... Soil Till. Res. 53 (199 9) 41−47.[2] Aura E., Effects of shallow tillage on physical properties of clay soil and growth of spring cereals in dry and moist summers in southernFinland, Soil Till. ... conventional and zero tillage in two soils of the Rolling Pampa of Argentina, Soil Till. Res. 49(199 8) 57−63.[61] Ter Braak C.J.F., Gremmen N.J.M., Ecological amplitudes of plantspecies and ... silty claysoils, the soil water content was higher after shallow tillage(6 cm) than after conventional tillage (25 cm) [2]. Similarly,the study of Azooz et al. [3], conducted on a silt loam...
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Báo cáo lâm nghiệp: "Effects of resource availability on condensed tannins and nitrogen in two Quercus species differing in leaf life span" doc

... effects of light, nutrients and species on leaf CT, N and growth under a fixed level of water (W80 0). The sources of variation are light levels (L8 , L3 6), nutrient levels (N−,N +) and species (Q. ilex, ... (car-bon source) and growth (carbon sink) with different inten-sity will affect the relative carbon pool available for allocationto carbon-based compounds. According to growth differenti-ation balance ... availabilities(standard substrate and 7% increase in soil N). The concentrations of soluble condensed tannins (CT) and nitrogen in the leaves were analyzed to testthe phenotypic plasticity of these commonly...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Effect of stand segmentation on growth and development of Norway spruce stands" pps

... the only one of all of them, is situated perpendicularly to the direction of prevailing winds, in contradiction to plot 3 where the skidding track follows the direction of prevailing winds.J ... 2009 ( 7): 323–329confirmed under conditions of this investigated locality.CONCLUSIONBased on the analysis of a part of results from the international IUFRO trial CZ 14 Machov investigat-ing ... perpendicularly to the direction of prevailing winds, in contradiction to plot 3 where the skid-ding track follows the direction of prevailing winds.– Stands without tending and without tracks had...
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Báo cáo lâm nghiệp: "Drought conditioning improves water status, stomatal conductance and survival of Eucalyptus globulus subsp. bicostata seedlings" ppt

... observed among prove-nances of several Eucalyptus [25, 42], between and withinsubspecies of E. globulus [15, 54], as well as among clones of E. globulus subsp. globulus [34]. After preconditioningwe ... Veilleux L. , Bernier P.Y., Growth, physiology, root architecture and leaching of air-slit containerized Picea glauca seedlings (1+ 0) in responseto time domain reflectrometry control irrigation ... texture, and sand(3: 1) (v/v) on August 1999. Seedlings were maintained during thewhole experiment in a glasshouse located in the experimental field of the Faculty of Agronomy, University of Buenos...
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Báo cáo lâm nghiệp: "Effect of Melampsora larici-populina on growth and biomass yield of eight clones of Populus nigra" ppsx

... clones from each other in the best way as for the intensity of rust infection. Yield decline was quite low (9 %) in clone 49, which belonged to the most infected clones. Similarly, in clone ... and beginning of August).Evaluation e trait of resistance to Melampsora larici-populina was evaluated in fi eld conditions using a 6-point scale: 0 – no signs of rust infection on leaves; ... infection re-mained stable in the tested set of clones during the trial. e intensity of infection during the growing sea-son in 2005 and 2007 was evaluated in the same way.  e ranking of clones...
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Báo cáo lâm nghiệp: "Effect of species composition, stand density and site index on the basal area increment of oak trees (Quercus sp.) in mixed stands with beech (Fagus sylvatica L.) in northern France" potx

... to the individual trees [9]. In addition, our dataset is not based on crop-tree selectionthinnings, but on stand-related thinning regimes. This partlyexplains the linear relation of ∆g and DBH ... simulations to analyze thebehaviour of the model [60]. All graphic and statistical analy-sis was realised with SAS [51].4. RESULTSThe segmented nonlinear model (Eq. ( 1)) fit well in all of the ... ageoak ), and site quality (SIoak ) as potentially in uencing variables.We calculated the stand density in two steps. We did thisby using the self -thinning rule (Rdi, Eq. ( 3)) formulated byReineke...
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