Báo cáo lâm nghiệp: "Insect damage to cones and other mortality factors limiting natural regeneration potential of Swiss stone pine (Pinus cembra L) in the northern French Alps" doc
Báo cáo lâm nghiệp: " Game damage to forest trees" ppsx
... predators produces changes in food chains. In forest stands influenced by human activities the reasonable game management and the regulation of game stock seems to be one of the main tools in forest ... consequently increase damage to nearby forest stands.– Insufficient and low-class hoofed game feeding in hard times. It is usually convenient to feed wildlife game according to its needs.– Game animals ... how to decrease damage to standing trees. R and S (1992) investigated game damage in Austrian condi-tions. Relationships between forest development and occurrence of hoofed game...
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Báo cáo lâm nghiệp: " A contribution to the properties of combined plywood materials" ppsx
... is again a theme of another research inclusive of determination of the elastic constant according to separate layers.Appropriate tests to determine parameters men-tioned above will be the ... density of plywoods significantly a ects the capacity of the material to dampen noise. To achieve good sound-proof properties materials of a density of 630 kg/m3 are ordinarily used (e.g. Polyvan ... refraction of materials in the whole profile and also in separate layers was not examined. e failure of materials at separate layer interface ow-ing to shear in bending oneself partially approved....
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Báo cáo lâm nghiệp: "Changes in phenolic acids and stilbenes induced in embryogenic cell cultures of Norway spruce by two fractions of Sirococcus strobilinus mycelia" pot
... concentrations during defence response in Nor-way spruce embryogenic cell suspension cultures induced by intracellular protein and wall prepara-tions from Sirococcus strobilinus mycelia. MATERIAL AND METHODSPlant ... embryo-genic cultures of Norway spruce (C) and in the cells elicited by mycelium protein fraction (PF) and mycelium wall frac-tion (WF) in the course of 24 h. Means ± Standard Error of two independent ... (ASTR) and piceid (PIC), determined in Norway spruce cell cultures treated with 5% and 20% A. abietina culture filtrate and from the control cells (C). Means of two independent experiments with two...
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Báo cáo lâm nghiệp: "Moisture effect on carbon and nitrogen mineralization in topsoil of Changbai Mountain, Northeast China" pptx
... primary productivity in ter-restrial ecosystems (J et al. 1999), N miner-Moisture effect on carbon and nitrogen mineralization in topsoil of Changbai Mountain, Northeast ChinaG. Q1,2, Q. ... is maintained at 20°C. For the given vegetation type of Changbai Mountain, soil C and N mineralization rate, potential mineralizable C (C0) and potential rate of initial C mineralization (C0k) ... Soil carbon mineralization potential and its effect on soil active organic carbon in evergreen broadleaved forest and Chinese fir plantation. Chinese Journal of Ecology, 26: 1918–1923. (in Chinese)W...
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Báo cáo lâm nghiệp: "A contribution to the resistance of combined plywood materials to abrasion" potx
... of plywood is available. Plywoods differ in many factors.CONCLUSIONe aim of the paper was to propose the method-ology of testing the abrasion resistance of combined water-proof plywood materials ... aim of the paper was to propose the methodology of testing the abrasion resistance of combined water-proof plywood materials with the phenol-formaldehyde foil surface finish and to assess the ... surface of materials with glass fibre shows specific properties. Before the actual assessment of abrasion resistance, the methodology of testing the abrasion resistance of combined water-proof plywood...
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Báo cáo lâm nghiệp: "Differences in morphological and physiological responses to water-logging between two sympatric oak species" doc
... roburdisplays a larger tolerance to water-logging and associated roothypoxia [22, 23,53, 60]. This difference of tolerance to water-logging between the two oaks was used as a starting point to identify ... aimingat identifying morphological and physiological responses to root hypoxia that might differ between the two species. Potted seedlings were submittedduring seven weeks to a water-logging ... Sciences, 2006DOI: 10.1051/forest:2006068Original articleDifferences in morphological and physiological responses to water-logging between two sympatric oak species(Quercus petraea [Matt.] Liebl.,...
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Báo cáo lâm nghiệp: "Modelling dominant height growth and site index curves for rebollo oak (Quercus pyrenaica Willd.)" pptx
... 929c INRA, EDP Sciences, 2006DOI: 10.1051/forest:2006076Original articleModelling dominant height growth and site index curves for rebollo oak (Quercus pyrenaica Willd.)Patricia Aa*,IsabelC˜b, ... A dominant height growth model and a site index model were developed for rebollo oak (Quercus pyrenaica Willd.) in northwest Spain.Data from 147 stem analysis in 90 permanent plots, where rebollo ... looking for relationships between site index and ecological variables [22,49], the analysis is fa-cilitated with a single dominant height growth pattern.Modelling dominant height growth for Q. pyrenaica...
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Báo cáo lâm nghiệp: "Frost damage on the terminal shoot as a risk factor of fork incidence on common beech (Fagus sylvatica L.)" docx
... P1 and P2 together, confirmedthat damage was an explanatory factor which was much sig-nificant than the other variables and factors available.Thus overall, the damage factor had both a statistical ... A risk of fork emergence was calculated for each of the damage levels. The relative risk of fork emergence, with its confidence limit (at 5% of risk level),was calculated for each of the damage ... Survey of frost damage An accurate survey of frost damage was made 3 weeks after the frost on 15 May 1995. Damage was exclusively recorded on the ter-minal spring shoot of the main axis. This local...
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Báo cáo lâm nghiệp:" Needle longevity, shoot growth and branching frequency in relation to site fertility and within-canopy light conditions in Pinus sylvestris" potx
... 195208â INRA, EDP Sciences, 2003DOI: 10.1051/forest:2003012Original article Needle longevity, shoot growth and branching frequency in relation to site fertility and within-canopy light conditions ... average needle age, shoot length growth, and branching frequency in response to seasonal averageintegrated quantum flux density (Qint) were investigated in Pinus sylvestris L. in a fertile site ... biomassinvestment in branches in low light. However, in our study,there was an increase in the fractional investment in needleswith increasing Qint in the fertile site, and no effect of Qint in the...
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Báo cáo lâm nghiệp:"Growth, damage and net nitrogen uptake in Picea abies (L.) Karst. seedlings, effects of site preparation and fertilisation" pptx
... 10.1051/forest:2003058Original articleGrowth, damage and net nitrogen uptake in Picea abies (L.) Karst. seedlings, effects of site preparation and fertilisationFredrik NORDBORG*, Urban NILSSONSwedish University of ... followinghypotheses: (i) site preparation increases seedling initialgrowth and reduces damage during the first year after planting in planted Norway spruce (Picea abies (L.) Karst.) seedlings, (ii) ... and high seedling growth with a low risk of nitrogen leaching. In this study, effects on seedling survival, growth and net nitrogen uptake were evaluated in three site preparations and two fertiliser...
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Báo cáo lâm nghiệp: "Growth response to thinning in Quercus pyrenaica Willd. coppice stands in Spanish central mountain" doc
... Growth response of Q. pyrenaica to thinning 245The results of Ducan’s test also explain the aforementioneddifferent responses to thinning intensities in the two growthintervals (Tab. ... deviation (in bracket) absolute and relative stem diameter increment of Q. pyrenaica trees in unthinned andthinned treatments (C – light thinning; D – moderate thinning; E – heavy thinning) .TreatmentsPeriod1994–1998 ... moderate thinning; E – heavy thinning. Va ri a ble s Ti m eInventories11994 1998 2002Dg Before thinning A CDE* A EC CD A* EDC DCA* After thinning ECD A*IcDg After thinning ED CA*EDC...
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Báo cáo lâm nghiệp: "Insect damage to cones and other mortality factors limiting natural regeneration potential of Swiss stone pine (Pinus cembra L) in the northern French Alps" doc
... but Short noteInsect damage to cones and other mortality factors limiting natural regeneration potential of Swiss stone pine (Pinus cembra L) in the northern French AlpsL ... seed cones of P cembra, and then to measure the respective impact of insects and other mortality factors on the potential of natural regeneration of stone pine forests. Insect damage ... the type and importance of damage (Roques, 1983). Insects were either preserved in 70% alcohol or raised to the adult stage.RESULTSCone entomofauna of Swiss stone pine Three...
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Báo cáo lâm nghiệp: "Changes in carbon uptake and allocation patterns in Quercus robur seedlings in response to elevated an 2 CO and water stress: C 13 labelling" pps
... to compensate for plant C uptake (+ 52% ). Plant N concentration and C/ N ratio over the 22 -week growing period Original articleChanges in carbon uptake and allocation patterns in ... elevated [CO 2 ], by-11 and +13% , respectively (table III).Drought increased plant C and N concen-trations in both CO 2 treatments. Carbon isotope composition of all plantcomponents ... uptake and allocation within pedunculate oak seedlings (Quercus robur L) grown under ambient (350 vpm) and elevated (700 vpm) atmospheric CO 2 concentration ( [CO 2 ]) and...
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Báo cáo lâm nghiệp: "Physiological responses to air pollutants" potx
... with air pollutants. According to Levitt (1980),two strategies can be distinguished: avoid-ance and tolerance. While avoidance stra-tegies include the cuticle and the stomata,tolerance ... lead to re-latively severe damage to trees, especiallyunder unfavorable weather conditions andshortening of the vegetation period.The stomata can play a role similar to the ... sulfhydril-system of plants. Phytopathol. Z.104, 264-271Hiligren J.E. (1984) Photosynthetic gas ex-change in leaves affected by air pollutants. In:Gaseous Air Pollutants and Plant...
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Báo cáo lâm nghiệp: "Physiological responses to" potx
... Physiological responses to low temperatureO. JunttilaDepartment of Plant Physiology and Microbiology, ... the plant. Native species andprovenances are normally adapted to localclimate but responses to low temperatureare of great importance when species orecotypes are moved ... derived from Norstarwinter wheat. Theor. Appl. Genet. 75, 480-484Levitt J. (1980) In: Responses of Plants toEnvironmental Stresses. 2nd edn. Vol. I. Acade-mic Press, New...
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