Báo cáo lâm nghiệp: "The contribution of wood products to carbon sequestration in Portugal" pptx
Báo cáo lâm nghiệp: "The contribution of wood products to carbon sequestration in Portugal" pptx
... 0.01 0.02 Carbon sequestration in wood products 907delimited by the minimum and maximum estimates of carbon sequestration. Even in the minimum estimate of the stock-changeapproach, wood products ... burning of fuel- wood, wood processing residues, and short-lived wood prod-ucts. Another part of the carbon remains stored in long-lived wood products in use, which may persist for decades to ... the wood products. However, the IPCC Guidelines allow the inclusion of this sink in the national inventory if a country can document that existingstocks of long term products are in fact increasing...
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Báo cáo lâm nghiệp: "The contribution of remote sensing to the assessment of drought effects in forest ecosystems" ppsx
... for a better understanding, monitoring and mod-elling of the carbon and water cycles as driving forces of global warming. A lot of remote sensing studies are carriedout to retrieve LAI and its ... the sensitivity of canopy reflectance to EWT in the SWIR domain was very im-portant, more than 65% of the total sensitivity. In this context,the monitoring of temporal evolution of vegetation ... factors in uencing the signal in the SWIR do-main. A combination of SWIR and NIR bands is necessary to retrieve EWT at leaf level. Dennison et al. [22] comparedthe same EWT index to a simple index...
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Báo cáo lâm nghiệp: "The role of Hylastes cunicularius Erichson (Coleoptera: Scolytidae) in transferring uropodine mites in a mountain spruce forest" pptx
... placement of uropodids on the bark beetle vector. A total of 3,302 adults of H. cunicularius were caught into flight interception traps, of which 529 (16%) vectored a total of 1,020 individuals ... = 403) in Bielovodská dolina. Of the 3,302 individuals of H. cunicularius sampled in the study area, 529 (16%) were vectoring a total of 1,020 individuals and four species of uropodine mites ... low in each sample plot. Simp-son’s index of diversity of mite assemblage ranged from 0.064 in the valley Bielovodská dolina to 0,108 in Tomanova dolina and 0.145 in Velická dolina, giv-ing...
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Báo cáo lâm nghiệp: " The influence of Picea abies on herb vegetation in forest plant communities of the Veporské vrchy Mts" ppt
... use of CCA for the investigation of par-tial species response to the proportion of spruce. e direct species – spruce relation was investigated by CCA which took into account significant factors ... 7-point scale of abundance and dominance adjusted by B et al. (1964) was used. e vertical structure of phytocoenoses was classified following the layers in TURBOVEG soft-ware for Windows ... summation of the abundance values of tree species in tree layers which involve the trees higher than a half-height of the trees in the main level. e flo-ristic comparison of groups was done in JUICE...
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Báo cáo lâm nghiệp: " The effects of cutting regimes on natural regeneration in submountain beech forests: species diversity and abundance" pdf
... abundance of both one-year-old and older seedlings. e abundance of beech seedlings was initially increasing with increasing cutting intensity, and, having reached the peak on plot M (medium intensity), ... consisting of beech and willow. e results of ANOVA in Table 3 indicate a signifi-cant in uence of different cutting operations on the number of all regenerating individuals, of all indi-viduals ... other hand, cutting of higher intensity (H, CC) resulted in lower numbers of fructifying parent trees. e medium cut intervention having provided the plot M with stocking of 0.5 (50% of the stand)...
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Báo cáo lâm nghiệp: "The effects of summer exposure to ozone on the frost hardiness after the vegetation period of Norway and Sitka spruce seedlings" doc
... concentration of ozone usingthe same fumigation system. In this case,although there was no effect of the pollu-tant on the attainment of deep winter hard-iness, the sensitivity ... to a temperature of about- 19°C, although there was a delay in hardening in those shoots that had beenexposed to ozone. For the Sitka spruce,there was no effect of ... timing of frost hardiness attained bythe shoots but, compared to the Norwayshoots at this time, there was a quitemarked difference (approximately 12°C) in the depth of...
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Báo cáo lâm nghiệp: "The influence of selected factors on energy requirements for plain milling of beech wood" ppsx
... most intensive above 30 ms–1 ; an increase in the value of the rake angle causes a decrease in cutting input. So, with regard to the acquired results of cutting input, in plain milling it ... (2009): e in uence of the selected factors on the cutting input power in sawing frozen beech wood. In: Proceedings 3rd ISC Woodworking Technique. Zalesina, September 2009. Zagreb, Faculty of Forestry: ... to study, on the basis of measure-ments of beech species with and without false heart, the in uence of selected factors of energy require-ments at plain milling of beech wood on cutting input...
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Báo cáo lâm nghiệp: "Genetic variation of wood density components in a radiata pine progeny test located in the south of Chile" pps
... / bois initial / bois final1. INTRODUCTIONGenetic improvement of radiata pine has been conducted in Chile since the late 70’s, mainly by breeding of parents selectedfor their outstanding growth ... proportion of juvenile wood within the stem will increase. In New Zealand, the real-ized genetic gain in stem straightness and stem diameter growth in radiata pine has already produced an increment of ... continuous line representing F = 1.56, andP < 0.05. (A) ED and LD; (B) EA, LA and LP.Genetic variation within ring wood density 113latewood), an increment in LD is related to a decrease in...
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Báo cáo lâm nghiệp: "Relative efficiency of alternative methods to evaluate wood stiffness in the frame of hybrid larch (Larix × eurolepis Henry) clonal selection" potx
... be used to increasethe intensity of selection to obtain a higher indirect gain.If felled trees are available, ultrasonic speed measured onlog offers a high indirect gain without needing additionalmoney ... radial faces of the same ring, in the same orientation (North andSouth): 2 measurements were carried out in the heartwood, and 2 in the sapwood.The next step was the sawing of each log into 4 boards, ... selection using indirect method (9% instead of 11.5% – Tab. IX). Meanwhile, the lower estimate of gainslightly affects the final selection of the clone: in this sample(Tab. X) 4 to 5 of the first...
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Báo cáo lâm nghiệp: "The results of manipulated experiments with inoculation of Ips typographus (L., 1758) to spruce trees under various levels" potx
... individuals were collected. ese in- dividuals were put into refrigerator into wet envi-ronment and later transported to lab. After several days, the number of individuals was enough high to ... forest decline symptoms and bark beetle attacks in study of P et al. (1996).Several studies have been performed in order to assess the factors affecting the susceptibility of stands to bark ... 25–30 29e amount of precipitation in July was low and the effect of this fact we observed via continual dry-ing the trees in that time (with exception of several days in the mid of July when precipitation...
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