Báo cáo lâm nghiệp: "Productivity and cost of manual felling with a chainsaw in Caspian forests" pptx
Báo cáo lâm nghiệp: "Productivity and cost of manual felling with a chainsaw in Caspian forests" pptx
... higher initial costs of mechanized harvesting machines, larger diameters and crowns of hardwoods, and the relatively steep terrain in Caspian forests, manual felling with a chainsaw is still ... a continuous time study on manual harvesting systems with a chainsaw model Stihl in a Caspian hardwood forest.(2) Estimate the production rates and costs of chain-saw felling. MATERIAL AND ... time-study data (B et al. 1986), which can be used for estimat-ing production rates and costs for similar thinning Productivity and cost of manual felling with a chainsaw in Caspian forests...
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Báo cáo lâm nghiệp: "Extraction and study of enzymes linked to malate metabolism in tree leaves" pdf
... 54506Vandoauvre, FranceIntroductionIt is well established that malate plays a central role in plant cellular metabolism(Lance and Rustin, 1984). Malate is theorganic acid ... particularly those located in mito-chondria, was investigated in coniferous and deciduous leaves. Particular attentionwas devoted to the variations in enzymecapacities during ... acid which can be accumulated tothe highest level in plant cells and its inter-nal concentration can display normal dailyfluctuations and can also present perma-nent or...
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Báo cáo lâm nghiệp: "Structure and development of forest stands on permanent research plots in the Krkonoše Mts" pdf
... accompanied by aggradation stage of the middle layer. Advanced natural regen-eration mainly of beech and sporadical silver fi r, sessile oak, rowan, sycamore maple, Norway maple, small-leaved linden, ... were examined. e main atten-tion was paid to areas with autochthonous forests stands with lowest human impact in the past and at present. Based on long term observations of verti-cal and horizontal ... Szklarka, Nad Jagnadkówem and river valley of Lomniczka (Poland).PRP 29 – U Bukového pralesa BSite and stand characteristicsForest stand 536 A1 7/2/1b with PRP 29 – U Bu-kového pralesa B...
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Báo cáo lâm nghiệp: "Survival and growth of outplanted seedlings of selected tree species on the High Tatra Mts. windthrow area after the first growing season" pps
... ex-periment was a two-way classification (combina-tion of planting time and Ectovit application; block) arranged in a randomized complete block design. Survival and damage of seedlings were calculated ... first of all the growth of new roots that facilitate the uptake of nutrients and water for rooting and bud-breaking of plants. Ad-vantages of using the containerized type of planting stock are ... SAS statistical package.RESULTSe average survival rate of bareroot and con-tainerized seedlings of all tree species outplanted at different seasons and with the application of the fungal...
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Báo cáo lâm nghiệp: "Extent and distribution of beech (Fagus sylvatica L.) regeneration by adult trees individually dispersed over a spruce monoculture" ppsx
... with a total area of 0.75 ha (Fig. 1) were mapped within the range of 22 individual beeches (their average spacing was about 16 m) on an area of 1.9 ha. Ap-proximately 40% of the stand area ... from within the fencing and outside of it.e basic spatial statistic of the point layer of re-generated individuals in “Telc” and “Ansprung” was calculated with the assistance of the ESRI “Near-est ... 350 and 400 m, with a maximum actual distance of 115 m and 254 m. G (2004) found out an ac-tual value of approximately 60 m with an average distance of 13 to 19 m depending on the terrain,...
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Báo cáo lâm nghiệp: "Quantity and distribution of fine root biomass in the intermediate stage of beech virgin forest Badínsky prales" potx
... depth and it has almost a linear character in the mineral soil. e comparison of the amounts of explained variance (r2) and the parameters of the linear and nonlinear (exponential) regression ... DISCUSSIONe values of total biomass of vital fine roots show a high variability in the investigated soil profile. e average value of the fine root biomass calculated as an arithmetic mean of all plots ... horizon was analyzed as a whole and separately. In the laboratory the fine roots were separated from the soil cores and the humus layer, respectively, and categorized as vital or dead. e dead roots...
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Báo cáo lâm nghiệp: "rigins and diversity of the Portuguese Landrace of Eucalyptus globulus" doc
... trees (with SSR data available) bearing the S haplotype(13 South-eastern Tasmania, 2 North-eastern Tasmania) and all individuals bearing haplotypes Cc41 and Cc56 (9 South-eastern Tasmania, 1 ... Ranges, Furneaux Group, North-eastern Tasmania, South-eastern Tasmania, Southern Tasmania, Western Tasmania and KingIsland; [38]) and Tidal River in Wilsons Promontory National Park,(Steane ... Tasmania, allhad closest SSR a nities to south-eastern Tasmania (Tab. I). In agreement with the cpDNA data, the Portuguese Landracehad SSR a nities to eastern Tasmania in the bulk (15/17) of the...
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Báo cáo lâm nghiệp: "Survival and growth of Acacia mangium Willd. bare-root seedlings after storage and transfer from aeroponic culture to the field" pdf
... thecollar and the last living bud before transplanting and at 2 and 7 monthsafter planting out.2.3. Statistical analysis A single factor analysis of variance (ANOVA) was performed todetermine ... Nitro-gen-fixing potential of Acacia mangium and Acacia auriculiformisseedlings inoculated with Bradyrhizobium and Rhizobium spp.,Biol. Fertil. Soils 9 (1990) 261–267.[5] Galiana A. , N’Guessan Kanga A. , ... scientific and administrative assistance. REFERENCES[1] Adjers G., Luukkanen O., Field comparison of A. mangium see-dlings with damaged and intact top shoots, in: Ministry of Forestry of Indonesia...
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Báo cáo lâm nghiệp: " Biomass and composition of understory vegetation and the forest floor carbon stock across Siberian larch and mountain birch chronosequences in Iceland" docx
... B2,was already in place when the area was protected, and is one of fewremains of the ancient birch woodlands that are believed to have cov-ered as much as 25% of Iceland’s surface at the time of ... A) in a soil/water mixture of 1:1.2.4. Canopy gap fractionGap fraction of overstory trees was measured with a pair of LAI-2000 Plant Canopy Analyzers (LI-COR Inc., Lincoln, Nebraska) in early ... density, dominantheight, mean diameter at breast height (DBH) and basal area(BA), are shown in Table I. Both managed Siberian larch for-ests and unmanaged birch forests had similar stand densities,except...
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Báo cáo lâm nghiệp: "Variability and heterogeneity of humus forms at stand level: Comparison between pure beech and mixed beech-hornbeam forest" ppsx
... on axes 1 and 2 than that of thepure stand (PS). It was the opposite on axis 3. This indicatedthat the range of sample variability within stands was greatestfor the mixed stand on axes 1 and ... projected as supplemen-tary individuals in the subspaces defined by the main factors of vari-ance underlined by the MCA. A within inertia analysis was computed in order to extract the totalvariance ... not (negative part of axis); and (ii) samples with a thick and continuous OHr and a thin A horizon with weak aggregate size (positive part of theaxis). This axis clearly opposed dysmull and hemimoder...
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