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 o...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Extraction and study of enzymes linked to malate metabolism in tree leaves" pdf
... 54506 Vandoauvre, France Introduction It is well established that malate plays a central role in plant cellular metabolism (Lance and Rustin, 1984). Malate is the organic acid ... particularly those located in mito- chondria, was investigated in coniferous and deciduous leaves. Particular attention was devoted to the variations in enzyme capacit...
Ngày tải lên: 09/08/2014, 04:20
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...
Ngày tải lên: 07/08/2014, 10:21
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 conta...
Ngày tải lên: 07/08/2014, 10:21
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 ass...
Ngày tải lên: 07/08/2014, 10:21
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 (r 2 ) and the parameters of the linear and nonlinear (exponential) regression ... DISCUSSION e 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 a...
Ngày tải lên: 07/08/2014, 10:22
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 King Island; [38]) and Tidal River in Wilsons Promontory National Park, (S...
Ngày tải lên: 07/08/2014, 16:21
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
... the collar and the last living bud before transplanting and at 2 and 7 months after planting out. 2.3. Statistical analysis A single factor analysis of variance (ANOVA) was performed to determine ... Nitro- gen-fixing potential of Acacia mangium and Acacia auriculiformis seedlings inoculated with Bradyrhizobium and Rhizobium spp., Biol. Fertil. Soils 9 (1990) 261–267. [5] Ga...
Ngày tải lên: 08/08/2014, 00:22
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 few remains 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 fraction Gap fraction of overstory trees was measured with a pair of LAI- 2000 Plant Canopy Analyzers (LI-COR Inc.,...
Ngày tải lên: 08/08/2014, 00:22
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 the pure stand (PS). It was the opposite on axis 3. This indicated that the range of sample variability within stands was greatest for 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...
Ngày tải lên: 08/08/2014, 00:22