Báo cáo lâm nghiệp: " Changes of the mixed mountain virgin forest after 70 years on a permanent plot in the Ukrainian Carpathians" pps
Báo cáo lâm nghiệp: " Changes of the mixed mountain virgin forest after 70 years on a permanent plot in the Ukrainian Carpathians" pps
... 2006. Changes of the mixed mountain virgin forest after 70 years on a permanent plot in the Ukrainian CarpathiansJ. V, J. Š, T. KDepartment of Forest Botany, Dendrology and Geobiocenology, ... beech rotate. In 1934 the stage of disintegration probably pre-dominated in the plot, because total timber volume was rather low and natural regeneration was abun-dant. Nowadays the stage of growth ... growth conditions of the crystalline Eastern Carpathians are fairly different from the con-ditions of Slovakian Carpathian virgin forests (e.g. Badínsky prales, Dobročský prales), the virgin forest...
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Báo cáo lâm nghiệp: "Estimation of genetic parameters European black poplar (Populus nigra Consequence on the breeding strategy" pdf
... expression of the part of the genotypic variance in the total variance, the values are the same as in column 1 of table 3. Broadsense heritability was also estimated in the ... eachtree.All observations concerned each ramet of the parents and each sib of the families.2.3. Variance analy.si.sAll data were processed with a multivariate variance analysis ... breeding laboratory INRA, Orl6!ins, for its technical help in establishing the experiment, maintaining it and in making observations. We are most grateful toPatricia Montes...
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Báo cáo lâm nghiệp: "Changes of partitioning and increased root lengths of spruce and beech exposed to ambient pollution concentrations in southern England" pdf
... southern Englandsite at Headley, Hampshire, where during the 1988 growing season concentrations of 03 reached 85 ppb on at least 5 occa-sions.aldearave Road. Twickenham TW1 ... that drought may act as an incit-ing factor, accelerating the decline of forest trees exposed to chronic doses of air pollution. For instance, many reportssuggest that ... D.W.H. Durrant and other staff at the Forestry Commission and P. Hutchinson fortechnical assistance.ReferencesLing K .A. & Ashmore M.R. (1987) In: Acid Rainand Trees....
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Báo cáo lâm nghiệp: "Reproduction of postfire Pinus halepensis Mill. stands six years after silvicultural treatments" ppsx
... halepensisstands along with the increase in the number of fires andburnt surface in Spain, has made appropriate forest manage-ment necessary during the early stages of the pine regenera-tion, since this ... 6 years after fire in Spain due to the small size of saplings at this time. Thinning can be performedwith a clearing saw (portable swinging arm scythe) since the more expensive use of the chain-saw ... prun-ing of branches and the high resin content increase the prob-ability of canopy fires and consequent death of P. halepensistrees.Both the natural and artificial expansion of P. halepensisstands...
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Báo cáo lâm nghiệp: "Response of Douglas-fir leaf area index and litterfall dynamics to Swiss needle cast in north coastal Oregon, USA" ppt
... spaced Pi-nus radiata plantation in New Zealand [69] and a Pinus taedaplantation with varying water and nutrition amendments in the southern United States [52]. Our understanding of the seasonalvariation ... evaluate monthly and annual leaf area turnoveracross a range in initial LAI. The goal of this analysis was to test and quantify the re-lationship between LAI and foliage litterfall across a range ... seasonalvariation in stand LAI is based on only a few Pinus species and a narrow range in environmental conditions, so further investi-gation is required to account for the effect of seasonal dynam-ics...
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Báo cáo lâm nghiệp: "Effect of defoliation by Thaumetopoea pityocampa (Den. & Schiff.) (Lepidoptera: Thaumetopoeidae) on annual diameter increment of Pinus brutia Ten. in Turkey" ppt
... Thaumetopoeidae) on annual diameter increment of Pinus brutia Ten. in TurkeyMehmet KANAT a *, M. Hakki ALMAb*, Fatih SIVRIKAYA a a Department of Forest Engineering, Faculty of Forestry, Kahramanmaras ... Kahramanmarascover an area of 192 521 hectares, which corresponds to 6% of the totalarea of P. brutia forests in Turkey. About 87 600 hectares (45%) of the total area of P. brutia in Kahramanmaras ... for 4 years in the soil. Between the years 1995 and 1998, the population of PPM remained at a certain level. In addition, it was observed that in the years at which infestationdecreased, the population...
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Báo cáo lâm nghiệp: "Changes in the mycorrhizal status of some mountain spruce forests" potx
... (Special Issue): 82–88 in Růžová hora the average decrease was 0 .70 g, in Sněžka 0.81 g (Fig. 5). Changes in the parameters within the years 2004–2006Data on mycorrhizal status of roots obtained ... 6).Considering the obtained data, it is hard to de-fine why the number of mycorrhizae in the plots dropped after ten years; it concerned the rapid de-crease of density of active as well as nonactive ... Discussion any other relationships cannot be proved. One of the reason is that the investigation period 2004–2006 is rather short and the in uence of weather oscillation from year to year cannot...
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Báo cáo lâm nghiệp: "Results of a phenological study of the tree layer of a mixed stand in the region of the Drahanská vrchovina Upland" ppt
... stage of budbreak and the beginning of foliage became evident in all monitored species most mark-edly. Because of a rapid increase in temperatures in May 2006, the duration of the stage of the ... onset of phenological stages due to increasing temperatures.CONCLUSIONe paper evaluates the results of phenological monitoring of the tree layer in a mixed stand in the region of the Drahanská ... of all monitored stages. Differences in the onset of phenological stages of the Norway spruce budbreak and of the beginning of foliage in European beech and European larch in a mixed stand in...
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Báo cáo lâm nghiệp: "Evaluation of changes in the landscape management and its influence on animal migration in the vicinity of the D1 motorway in Central Bohemia" ppsx
... threat has been the main reason for initiating activity concerning this issue. A report known as COST 341 was established that presents informa-Evaluation of changes in the landscape management ... occupation of biotopes and agricultural lands due to constructing industrial areas in the motorway’s vicinity, changes in area dimensions of agricultural and forest land, construction of residential ... 2007).MethodologyUsing GPS and a GIS application, the project in- volves mapping both the landscape permeability re-garding migration and landscape structure changes in an area in uenced by a linear construction...
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Báo cáo lâm nghiệp: "Changes in the abundance of Melolontha hippocastani" ppsx
... comparisons of the abundance of the M. hippocastani Fabr. population after swarming in 2004 and 2008 will be clear after we obtain control results of the abundance of the 2nd instar grubs in 2010.Bulhary ... On the basis of literary data on mass swarming in the past there is an evidence (M 1975) that this tribe has appeared in a cycle of four years on a regular basis for many decades. On 7 and ... in 2003 (Š 2006) and in 2007. In the in- between years adults ap-peared only sporadically (Fig. 1). Grubs of one in- star and sporadically grubs of other instars appear in the soil. On...
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