Báo cáo lâm nghiệp: "Rationalization of the performance of a mobile off-road system working in the forest environment with respect to its emission load" doc
Báo cáo lâm nghiệp: "Rationalization of the performance of a mobile off-road system working in the forest environment with respect to its emission load" doc
... suitable machinery, and in using acceptable methods for the employment of machines with the rational performance. Pos-sibilities to determine the rational performance of machines are further ... of reaching its design performance have to be considered.Possibilities of increasing the design performance of forest systems:– Increased material flow range By increasing the number of working ... extending the cross sections within roads where the material is transported;– By increasing the maximum working capacity (performance) .Determination of the optimum regime of the logging and...
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Báo cáo lâm nghiệp: "Comparison between field performance of cuttings and seedlings of Eucalyptus globulus" ppsx
... inadequate because materials are not comparable.Nevertheless the disparity of results between studies highlights the importance of plant quality of cuttings as a critical factor,at least during initial ... only set to germinate at a later stage, as to ensurecuttings and seedlings were of similar size at planting.These trials allowed a direct comparison between plants of the samegenetic background ... made. These parents are commonlyreferred as belonging to the Portuguese land race, although its racialbackground (their original native races in Australia) is unknown.2.1. Field trials In the...
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Báo cáo lâm nghiệp: "Improving RBS estimates – effects of the auxiliary variable, stratification of the crown, and deletion of segments on the precision of estimate" pps
... of paths of each tree (eq. [1]) and the true totals and variances of the target variables and the estimates of the totals, respectively.Choice of the auxiliary variable and variance of the ... beginning at the base of the segment, a proxy of the volume of that part of the branch, as the auxiliary variable. Each path was terminated when a diameter of 5 cm or less was encountered. e same ... xi – auxiliary variable of the ith segment.Each selected path yields an estimate of the total F of the target variable, which is calculated based on the values of that variable at each segment...
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Báo cáo lâm nghiệp: "reproductive and morphometric characteristics of wild boar (Sus scrofa) in the Czech republic" pot
... April in the Kostelec area (up to 80%), in con-trast to the Doupov area (55%) and Šumava (46%), may again signify the in uence of the area with regard to both the time of farrowing and the mor-phometric ... parameters. is confirms the findings of M and F (2004) that in case there is an abundance of food available during the preceding autumn and favourable environmental factors, the ... the appropriate management of a game population that is now a ma-jor issue in professional circles. As the main manage-ment suggestion is stopped the increasing of popula-tion density in all...
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Báo cáo lâm nghiệp: "rowth and health state of silver fir (Abies alba Mill.) in the ridge area of the Jizerské hory Mts" docx
... tests of the potential support to the vitality of the fir plantations by means of ameliorating measures were a part of the experiment. A part of the plantings was standard without soil amelioration ... after the growth termination at the beginning of autumn. e height growth was evalu-ated according to the parameters of all living fir indi-viduals in 2007 and according to 20% of the highest individuals ... mid-seventies to the mid-nineties of the last century.MATERIAL AND METHODSResearch plot (RP) was established on a clearing due to salvage felling (an area of about 20 ha) in the upper part of the south-western...
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Báo cáo lâm nghiệp: "Growing stock-based assessment of the carbon stock in the Belgian forest biomass" ppsx
... over the three Belgian regions: Flanders, Brussels-Capital and Wallonia; forest cover gives the ratio of the regional forest area to the total regional area.Region Total area Forest area Forest ... stock in the living biomass of the Bel-gian productive forests was calculated for the year 2000. In a final analysis, the BEF s.l. category that introduces the largestvariability in the calculation ... selectedaccording to a 1.0 km × 0.5 km grid oriented from the east to the weston the National Geographic Institute (NGI) maps at a scale of 1/25 000. The rectangular grid had the advantage of going against...
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Báo cáo lâm nghiệp: " Early development and nutrition of Norway spruce (Picea abies (L.) Karst.) seedlings on different seedbeds in the Bavarian limestone Alps – a bioassay" ppsx
... content in the highlydecayed woody substrate. The high water storage capacity of dead wood in combination with a high amount of released,available N by bacteria would be able to explain the high ... shoots, androots of the seedlings were separated using a scalpel, and the threeparts were pooled for each pot to obtain adequate plant material foranalysis. Total root length and the number of ... 47,58].Thus, with increasing extractable (Ca + Mg)/K ratio in min-eral soils, acquisition of K by seedlings decreased (Tab. VII).Our data revealed that the acid dead wood had high amounts of extractable...
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Báo cáo lâm nghiệp:"Growth and biomass partitioning of Fagus sylvatica L. and Quercus robur L. seedlings in response to shading and small changes in the R/FR-ratio of radiation" pot
... mangostana. In addition, an increasingnumber of branches of young Quercus petraea and anincreasing length growth of these branches with increasingTable I. Results of regression analyses after ... (length) of the main stem (mm), diameter (tenth of a mm) of main stem collar at a permanently marked position 3 cm above the substrate surface,diameter (tenth of a mm) of the main stem at the half ... the volume index VB(product of branch length and the square of the diameter at branchbase (in cm respectively)) and the dry mass of the branch (DMbranch)that was calculated using the branches...
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Báo cáo lâm nghiệp: ": Climate-tree-growth relationships of Quercus petraea Mill. stand in the Forest of Bercé (“Futaie des Clos”, Sarthe, France)" docx
... occurring for over than 20 years can beinterpreted as a response to the increase of harvesting intensity. The influence of climate was evaluated by comparing earlywood, latewood andtotal ring indices ... past history of a 300-year-old Quercus petraea stand (the “Futaie des Clos”, 8 ha) located 20 km from the town of Le Mans in the Forest of Bercé in the western part of France (Sarthe) was analysed ... from the period 1921–2001 were used as explanatoryvariables. ETP was calculated using Turc’s formula; it has the advan-tage of taking into account only temperature, global radiation and aver-age...
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Báo cáo lâm nghiệp: "Occurrence, biology and harmfulness of Galerucella lineola (F.) (Coleoptera, Chrysomelidae)" pps
... (Polnička, 1997). e mean leaf area of A. glutinosa damaged by imagoes including the mean number of laid eggs in the laboratory. An asterisk* indicates the occurrence of Beauveria bassiana. In rearings ... due to heavy Table 1. Abundance of G. lineola imagoes at sweeping on A. glutinosa and A. incana (Polnička, 1996). e mean leaf area of A. glutinosa damaged by imagoes and the mean number of laid ... eggs in the laboratory. An asterisk* indicates 28.6% parasitization of imagoes by tachinas Medina collaris (Fall.). In rearings free of tachinas, the total mean life span is given of male and...
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