Báo cáo lâm nghiệp: "Evaluation through a simulation model of nutrient exports in fast-growing southern European pine stands in relation to thinning intensity and harvesting operations" doc

... and SG-ratio tested depending on thinning intensities for radiata pine and maritime pine. Pinus radiata Pinus pinaster Intensity of First thinning Second thinning First thinning Second thinning thinning ... study was to calculate the accumu-lation and the export of nutrients over time in Pinus pinaster(maritime pine) and Pinus radiata (radiata pine) stands under a range of silvicultural alternatives, ... exports of pine plantations and thinning 379Figure 1. Nutrient removals and nutrient returns to soil as logging residues due to thinnings and clear-cutting as a function of thinning intensity and...

Báo cáo lâm nghiệp: "Aboveground biomass relationships for mixed ash (Fraxinus excelsior L. and Ulmus glabra Hudson) stands in Eastern Prealps of Friuli Venezia Giulia (Italy)" pptx

... mean annual temperature is 10° C and the annualrainfall is about 2500 mm. The stand occupies an area of 2.4 ha and was partially used in the past as grassland. The forest is dominated byash ... leaf area with basal area.2. MATERIALS AND METHODS2.1. Study areaAll data were collected in a uneven-aged mixed ash stand in Taipana (Udine, Friuli Venezia Giulia, Italy) at 600 m a. s.l. (46° ... byafforestation and reforestation of former agricultural areas with a net increase of 14.9% of the forest area in Italy during the lastfifty years [14]. In particular, the climatic and edaphic charac-teristics...

Báo cáo lâm nghiệp: "Evaluation of a semi-empirical model for predicting ﬁne root biomass in compositionally complex woodland vegetation" ppsx

... projectthat examined patterns of below- and above-ground biomass in Eu-calyptus populnea woodland ecosystems along a rainfall gradient in northeast Australia [25]. Here, data from the xeric- and ... in compositionally diverse woodland vegetation from contrastingclimatic regions in northeast Australia.2. MATERIALS AND METHODS2.1. Data sourceThe data used in this work were collected as part of a larger ... Zerihun A. , Montagu K.D., Hoﬀmann M.B., Bray S.G., Patterns of belowground and aboveground biomass in Eucalyptus populneawoodland communities of northeast Australia along a rainfall gra-dient,...

Báo cáo lâm nghiệp: "Production potential and ecological stability of mixed forest stands in uplands – VI. A beech/larch stand on a mesotrophic site of the Křtiny Training Forest Enterprise" pot

... dominant stand and the volume of dead trees is not included in the calculation. Stand density was calcu-lated according to standard mensurational practice from the ratio of actual basal area ... potential and stability of mixed forest stands in uplands. A mixed beech/larch stand that was established by natural regeneration in 1934 to 1942 is assessed. e stand is situated at an altitude of ... permanent thinning plots in the traditional layout. e total area of the stand part is 1.14 ha. e stand is situated on a plateau sloping slightly northward at an altitude of 460 m above sea...

Báo cáo lâm nghiệp: "Evaluation of the growth and health status of selected clone mixtures in comparison with ordinary planting stock" docx

... time being. e health status (defoliation was not higher than 10% in any variant and there occurred hardly any changes in the coloration of assimilatory organs 2 years after outplanting) and ... rašelina RP indicates high statistical signiﬁcance of the in uence of provenance of particular variants (clones) (Table 2).Dispositions to the growth rate of particular clones were maintained ... evaluate possibilities of natural selection of tolerant clones by situating ortet plantations and clone plantations into extreme mountain conditions. MATERIAL AND METHODSGrowth and health status...

Báo cáo lâm nghiệp: "Evaluation of squared timber and log products in the Hyrcanian Forests of Iran" doc

... northern areas of Iran are known as Hyrcanian Forests and are distributed across three provinces, namely Gilan, Maznadarn and Golestan. These provinces are situated in the north of Iran near the Caspian ... known as the Northern Forests or Hyr-canian Forests and are distributed across three provinces: Golestan, Mazandaran, and Gilan.  e majority of these forests are located in Mazandaran Province ... non-mechanized logging systems, after cutting, felling and delimb-ing, the logs are cut using manual chainsaws into smaller products such as squared timber, sawlogs and so on in forest stands. ...

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

... existence of diverse landscapes? Fenina, 178: 55–80.W T. (1998): Landscape structure as indicators for sustainable land use? A case study in alpine and lowland landscapes of Austria. In: D ... based on their spa-tial and technical characteristics. e aim was to obtain information on the migration of wildlife in relation to change in the landscape structure and to evaluate the in uence ... linear structure in the form of a motorway and by associated linear and polygon constructions. Aerial photographs were used to monitor changes in the landscape structures and various approaches...

Báo cáo lâm nghiệp: "Evaluation of physiological and health state of Norway spruce plants with diﬀerent growth rate at juvenile stage after outplanting at" pdf

... and 180 min of desiccation.  e whiskers show the conﬁ dence interval at a 5% signiﬁ cance levelReaction of the assimilatory apparatus to increasing radiation intensity At the increasing intensity ... stem and branchesType of damage Description of damage IndexStem damageno damagesubstitute shootsstem breakages012Branch damageno damagemoderate damage (small injuries, breakages of weak ... in forest outplantings.Damage to branches and stem was evaluated ac-cording to severity. Damage indexes are shown in Table 2 in the chapter Material and Methods. e frequency of stem damage...

Báo cáo lâm nghiệp: "Evaluation of twenty-years-old pedunculate and sessile oak provenance tria" doc

... provenances planted on all plots is shown in Fig. 6.  e mean values of height and breast-height di-ameter, separately for pedunculate and sessile oak, and total mean values for individual provenance ... heights and dbh are presented in Table 4. Sum-mary statistics of source data (tree heights and dbh values) at all sites are given in Tables 6 and 7. The resulting data on mean heights for individual ... Comparison mean heights of oak provenances at the plot Plasy in the age 15 and 20 years. (Prov-enances of Q. petraea are marked in dark)Fig. 4. Comparison mean heights of oak provenanc-es...

Báo cáo lâm nghiệp: "Evaluation of three methods for estimating the Weibull distribution parameters of Chinese pine (Pinus tabulaeformis)" pps

... distri-butions of black spruce (Picea mariana) plantations in eastern Canada. Canadian Journal of Forest Research, 34: 2424–2432.MABVURIRA D., MALTAMO M., KANGAS A. , 2002. Pre-dicting and calibrating ... simulation techniques are used to generate Weibull populations with known parameters and the estima-tors are analyzed and evaluated from Chinese pine (Pinus tabulaeformis) data and simulation ... 0.10631dbh – diameter at breast height; N – stand density; H – average height of dominant and codominant trees; BA – basal area; Mean, Min., Max. – mean, minimum and maximum diameter at breast height...

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