Báo cáo lâm nghiệp: "partitioning and production of 15 N-labelled litter in beech trees" pps
Báo cáo lâm nghiệp: "partitioning and production of 15 N-labelled litter in beech trees" pps
... article 15 N partitioning and production of 15 N-labelled litter in beech trees following [ 15 N]urea spray Bernd Zeller Micheline Colin-Belgrand a Étienne Dambrine Francis Martin Écosystèmes ... mea- sured in this litter as a result of successive [ 15 N]urea applications. During the course of this labelling experiment, 4.9, 7.3 and 8.5...
Ngày tải lên: 09/08/2014, 04:20
Báo cáo lâm nghiệp: "Quantity and distribution of fine root biomass in the intermediate stage of beech virgin forest Badínsky prales" potx
... length and the soil 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 ... with the dominant function of water and minerals supply. e ratio between the fine root length and the number of root tips is an indicator of the intensity of the fine roo...
Ngày tải lên: 07/08/2014, 10:22
Báo cáo lâm nghiệp: "Predispositions and symptoms of Agrilus borer attack in declining oak trees" docx
... each plot consisted of an equal number of healthy-looking and declining oaks. At the end of June 1997, a preliminary survey was made of insect emergence-holes and longitudinal bark cracks through ... galleries in infected branches of wilting bur oaks, presumably made by A. bilineatus, but did not investigate the trunks. A. bilineatus appears to start its attacks in the crown...
Ngày tải lên: 08/08/2014, 01:22
Báo cáo lâm nghiệp: "Structure and development of forest stands on permanent research plots in the Krkonoše Mts" pdf
... spruce beech stands) and spruce stands, relict pine woods and stands in the ecotone of the upper forest limit in diff erent site, stand, air-pollution and eco- logical conditions were examined. ... result of changing genera- tions of beech. In Krkonoše Mts. the largest reported tree is silver fi r with 182 cm of dbh and 58 m of height. Total volume of forest st...
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
... the seedling types of pine was almost 20% in autumn and even 42% in spring outplanting. However, es- pecially the comparison of bareroot and container- ized spruce and pine seedlings in this ... pine seedlings which were in the advanced phase of height growth at spring planting. Height in- crement of containerized Scots pine seedlings from spring outplanting with th...
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
... height and thickness of the root collar of sample regenerated individuals selected from within the fencing and outside of it. e basic spatial statistic of the point layer of re- generated individuals ... from game the density is in the range of hundreds of individuals; in protected groups density can be in the range of tens of thousands of individuals per hec...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Productivity and cost of manual felling with a chainsaw in Caspian forests" pptx
... compare the production and cost of other harvesting machines or systems used in the region and will be helpful for the loggers in selecting an appropriate system under certain stand and harvest ... Estimate the production rates and costs of chain - saw felling. MATERIAL AND METHODS Site of study is study was carried out in compartment 231 in Chafroud forests...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "rigins and diversity of the Portuguese Landrace of Eucalyptus globulus" doc
... Cg33 Gippsland AV6 Castelo Branco Cg33 Gippsland King Is. (50): SE Tas (17) ME70 Penamacor Cg33 Gippsland SE Tas (42): Gippsland (21) JG2 Santo Tirso Cg33 Gippsland VC9 Valongo Cg33 Gippsland SE ... [8, 32]. Breeding programs for E. glob- ulus have since been established in other countries including Australia, Chile and Spain [12, 32]. In many cases the Aus- tralian origin of these ex...
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
... use of bare-root seedlings con- ditioned in blown-up plastic bags allows the protection of saplings from dehydration and transportation shocks. Field trials in the context of industrial plantings ... shoots, in: Ministry of Forestry of Indonesia (Ed.), Trials established in 1986–1987 in the Mecha- nized Nursery and Plantation Project in South Kalimantan (ATA- 267), Ja...
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
... occurs in about 15 years, fol- lowed by the first thinning at age of ca. 30 years and with at least two additional thinnings during a rotation of 80–120 years [5]. The stand density at final harvest ... B., Beinar maelingar a kolefnisbin- dingu skograektarsvaeda (Direct estimates of carbon sequestration by afforestation), Procedings from Fraedathing landbunadarins 2004, pp. 269–27...
Ngày tải lên: 08/08/2014, 00:22