Báo cáo lâm nghiệp: "Post-fire resprouting ability of 15 non-dominant shrub and tree species in Mediterranean areas of NE Spain" pot
Báo cáo lâm nghiệp: "Post-fire resprouting ability of 15 non-dominant shrub and tree species in Mediterranean areas of NE Spain" pot
... 10.1051/forest:2007070Original articlePost-fire resprouting ability of 15 non-dominant shrub and tree species in Mediterranean areas of NE SpainLidia Quevedo,AnselmRodrigo*,JosepMariaEspeltaUnit of Ecology and ... resprouting ability of the non-dominant tree and shrub species of the Mediterranean Basin has not yet been experimentally tested,although this group contributes to maintain the richness of Mediterranean ... dominant for-est tree and shrub species in Mediterranean- type ecosystemswith well-known resprouting ability after fire [4,20,22,28,32].Interestingly, resprouting ability was not conditioned...
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Báo cáo lâm nghiệp: "Growth trends reveal the forest structure during Roman and Medieval times in Western Europe: a comparison between archaeological and actual oak ring series (Quercus robur and Quercus petraea)" pot
... growthrate of trees and hence influence the width of the tree- rings. Forring-porous species in general and European oak more specific,it has been demonstrated repeatedly that tree- ring width and cambial ... thecross-section of a tree stem near the base, generally measured at breastheight. The BAI is then defined as the increase in basal area of a tree over a specified time period (e.g. one growing season). Ring-widthseries ... processing Tree- ring widths of the contemporary, archaeological and histori-cal wood specimens were measured to the nearest 0.01 mm using aLINTAB measuring stage and the TSAP-Win acquisition and...
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Báo cáo lâm nghiệp: "Post-transplant root and shoot development in Abies nordmanniana Spach. seedlings after whorl bud and branch pruning" potx
... length and root tipsTotal root length, including length of both tap and lat-eral roots, doubled from time of transplanting in April tofirst sampling in June in untreated controls and in seedlings in ... gibberellins and indole-3-acetic acid in current-year shoots of Pinus sylvestris, Tree Physiol. 17 (1997) 715 721.[28] Wilson F.B., Compensatory growth in shoot populations of youngwhite pine trees, ... development in root DW remained low in the periodfrom transplanting to the first sampling in June (Fig. 2a).From June to July an increase was observed in the treat-ment where whorl and lateral buds and...
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Báo cáo lâm nghiệp:"Post-grazing Scots pine colonization of mid-elevation heathlands: population structure, impact on vegetation composition and diversity" pdf
... Opengrasslands and heathlands without tree colonization; (2) Grasslands in the process of being colonized (scattered pines); (3) Dense and young Scots pine stands; (4) Submature Scots pine stands ... grasslands and heathlands without tree colonization; (2) Grasslands in the process of being colonized (scattered pines); (3) Dense and young Scots pine stands; (4) Submature Scots pine stands ... agropastoral system including grazing and shrub- clear-ing was proven to be an effective means of controlling pineinvasion [3, 20], but grazing cessation allows pine invasion.During the initiation stage,...
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Báo cáo lâm nghiệp: "Ground based operation effects on soil disturbance by steel tracked skidder in a steep slope of forest" ppt
... of the machine are lim-ited and accrued rutting and mixing of mineral soil with litter mass by the track grouser of this machine type. However, the large ground contact area of this machine ... whereas in many forest areas, particularly in steep terrain with large trees and high precipitation rates, these machines are likely to remain the most common type of skid-ding machine used. In ... prior to skidding and assigned to six combinations of slope classes (SC1 and SC2) and traffic intensities (one, five and nine traffics) with at least 5 m buffer zone between plots to avoid interactions....
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Báo cáo lâm nghiệp: "Predicting balsam fir growth reduction caused by spruce budworm using large-scale historical records of defoliation" potx
... volume increment losses were assessed on the basis of standardized ring width and periodic annual increment in volume,respectively, in order to eliminate the effect of tree ageing and initial tree ... because of the continuous abundance of balsam firstands [8, 24, 25]. Since fir-dominated stands are still abundant and are expected to remain so into the future, sustained man-agement of these ... 180° and 270° of the first. Dating of each ring series was done using all the discs sampled for each tree. First, very large or very narrow rings were pointed on discs sampled in the tree bole since...
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Báo cáo lâm nghiệp: "Classifying xylophone bar materials by perceptual, signal processing and wood anatomy analysis" pdf
... bands linking vessels(Hymenolobium). Only Calophyllum and Swietenia had anapotracheal parenchyma, i.e. the first in the form of a few shortto long bands, and the latter in marginal bands. All ... the original set in which the newparameters (principal components) were not correlated and closely represented the variability of the original set. Table Vshows that five principal components ... straight grained, knot-free, and withoutdefects. The specimens were cut to minimize the curve of the growthrings, with the ring parallel to the tangential grain of the wood. Thelongitudinal direction...
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Báo cáo lâm nghiệp: "Beech (Fagus sylvatica L.) – Technological properties, adhesion behaviour and colour stability with and without coatings of the red heartwood" ppsx
... Testing of wood; determination of density, 1976.[9] DIN 52183 Testing of wood; determination of moisture content,1977.[10] DIN 52184 Testing of wood; determination of swelling and shrinkage,1979.[11] ... irradiation developslinearly with increasing yellowness. This links yellowingdirectly with photooxidation of lignin [29]. New surface coat-ings contain lignin stabilizing components in primer treatmentsto ... 19% of the forest area of Switzerland [17] ,15% of Germany [13] and 9.4% of the total area in France [14]. Theeconomic importance of beech increased in the last years by thecontinuous demand...
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Báo cáo lâm nghiệp: "Diversité allozymique de peuplements de cyprès naturels et introduits au Maroc : conséquences pour la gestion des ressources" potx
... these 2 origins and could be used for introgression monitoring. Advice for preserving and using C. atlantica genetic resources and for reducing the degradation of these natural stands are proposed.Cupressus ... diversity of natural and introduced cypress stands in Morocco: consequences for management of geneticresources. For the purpose of managing Cupressus atlantica natural genetic resources in Morocco, ... Husband B.C., Schemske D.W., Evolution of the magnitude and timing of inbreeding depression in plants, Evolution 50 (1996) 54–70.[21] Joubert A., Formations forestières marocaines, Les Cupressinées,Revue...
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