Báo cáo lâm nghiệp: " Crown architecture and leaf habit are associated with intrinsically diﬀerent light-harvesting eﬃciencies in Quercus seedlings from contrasting environments" ppt

... 511c INRA, EDP Sciences, 2006DOI: 10.1051/forest:2006033Original article Crown architecture and leaf habit are associated with intrinsically different light-harvesting efficiencies in Quercus seedlings ... 37–39]. In agreement with this, we observed thelowest mean and total leaf areas in seedlings of Mediterraneanoaks (Fig. 3). The reduction in the mean area of individualleaves resulted in a non-linear ... that contrasting morphologies are asso-ciated with contrasting light harvesting efficiencies in species from different provenance environments due to the different selective pressures operating on...

Báo cáo lâm nghiệp: "Growth, allocation and leaf gas exchanges of hybrid poplar plants in their establishment phase on previously forested sites: eﬀect of diﬀerent vegetation" docx

... timelongleaf pine seedlings are in the grass stage and increase heightgrowth, New For. 19 (2000) 279−290.[31] King J.S., Albaugh T.J., Allen H.L., Kress L.W., Stand-level allom-etry in Pinus ... year beforeplanting. In both sites, tall bare-root plants (1−2m)wereusedtomini-mize deer damage and were planted with a 3 × 3 m spacing. In thebeginning of June 2004, six diﬀerent weed-control ... plants compared to the plants growing in theother treatments. Leaf- mass area was lower in trees growing in the H and LH treatments (only signiﬁcant in 2YS) (data notshown), but leaf nitrogen...

Báo cáo lâm nghiệp: "Stand biometry and leaf area distribution in an old olive grove at Andria, southern Italy" pptx

... xylem cross-sectional area and leaf areameasured in altogether 700 olive shoots and branches (B).tween 20 and 220 m2per tree) in the given stand. Variationoccurring in leaf area density per layer ... cm2)theycontinued growing in length and width in a similar rate. The al-ABFigure 10. Radial pattern of leaf area density (LADrad) and total leaf area per annuli distribution in olive crowns, ... = 120) trees in the stand.Total leaf area for each individual tree was obtained when summingvalues for all individual layers (m). Similarly total leaf area for the en-tire stand was calculated...

Báo cáo lâm nghiệp: "Neuroptera, Raphidioptera and Mecoptera assemblages inhabiting young spruce (Picea abies) forests: dominance structure and seasonal activity patterns" docx

... passive, non-powered and continuously operating tent-like trap. Its height is 2 m and collecting surface is approximately 6 m2. Collecting sheets are black and a covering sheet is white. ... a.s.l.) in very young spruce forests (10–20-year-old). All Malaise traps were installed in small forest clearings, minimally 30 m inwards the forest. e forest clearings are covered mainly by ... (Calamagrostis arundinacea) and shrubs like bird cherry (Padus racemosa) are growing there occasionally too. e traps were exposed from the beginning of April to the end of October. From April to...

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

... 2.38 2.14344deviation from 3 significant insignificant insignificant insignificant insignificant significant insignificant insignificant insignificant insignificant insignificant insignificanthalf-sum 8.85 ... larch and beech in height and diameter classese development of larch and beech frequency in height classes in the course of 1961–2003 is given in Tables 4 and 5, and in diameter classes in ... again according to the particular species in five-year intervals is given in Table 9. e total growing stock in- creased from initial 63.3 m3/ha in 1961 to 496.9 m3/ha (i.e. 7.8 times) in...

Báo cáo lâm nghiệp: " Humus conditions and stand characteristics of artificially established young stands in the process of the transformation of spruce monocultures" pdf

... (spruce with beech and larch with beech) aged 25 years with a pure beech stand (aged 40 years) and pure spruce stand (aged 30 years) in the Drahanská vrchovina Upland.MATERIAL AND METHODSSite and ... both actual and exchangeable pH decrease with increasing depth (Figs. 2 and 3) in all stands and the lowest values were determined in the H layer. e lowest values in forest ﬂoor in the H horizon ... between a spruce and beech stand and mixed stands in car-bon reserves and between beech stand and both mixed stands in nitrogen reserves only.– e C/N ratio of the spruce stand was 23.5 (±...

Báo cáo lâm nghiệp: "Occurrence, biology and harmfulness of Galerucella lineola (F.) (Coleoptera, Chrysomelidae)" pps

... studied in Alnus glutinosa and A. incana mainly in Polnička Forest District (Žďár region) and a “willow” form in Salix viminalis, S. triandra and S. caprea in riparian and accompanying stands ... ﬁndings were also obtained on Galerucella (= Pyrrhalta) lineola (F.) dealt with in this paper con-sisting of two parts. In Part 1, mainly host species are described including the feeding and ... feed-ing was divided on average into 15 partial stages by 3.5-minute intervals. Females ate on average 36 times by 7 min during the day. Breaks in feed-ing took in males on average 94 min and in...

Báo cáo lâm nghiệp: "Soil environment and nutrient status of Norway spruce (Picea abies [L.] Karst.) underplantings in conditions of the 8th FAZ in the Hrubý Jeseník Mts" potx

... 149derplantings increases with a decreasing content of these nutrients in needles. An opposite correlation was determined for aluminium: with an increasing proportion of this element in nutrition ... Jesenická kotlina basin is the most pronounced. Mountain ridges, often rising above 1,200 m a.s.l., are typically massive and round, with deep, young erosion valleys cutting into them, often with smaller ... underplant-ings was observed at sites with the suﬃ ciently developed and humus organomineral horizon.  is environment can be simulated during out-planting by mixing humiﬁ cation and organomin-eral...

Báo cáo lâm nghiệp: "Canopy structure and spatial heterogeneity of understory light in an abandoned Holm oak woodland" pps

... 3◦41’–3◦47’ W within the province of Madrid (Spain) included Holmoak formations spanning from open woodlands to closed forests with basal area, canopy height and stem density values within the rangeobserved ... (Fig. 1). Some minor recreational activities are currently taking place in the area together with marginal live-stock grazing, an increasingly common situation in the ruralareas of Southern ... decreased and basal area in- creased with stem density, the latter being low or medium undertraditional management and high when woodlands are abandoned(results from 400–2700 sampling plots in the...

Báo cáo lâm nghiệp: "Genetic variation and genotype by environment interactions of juvenile wood chemical properties in Pinus taeda " pps

... lignin (%), fiber length (mm) and coarseness means for ring 3 and ring 8 from the pith. E and L stands for earlywood and latewood within each ring, respectively. The thick horizontal bars in the ... were estimated byadding parental general combining ability estimates to the estimatedwithin-family value (Aw). Within-family value (Aw) for each tree isobtained from solving the mixed model ... vector of random-effects parameters including general com-bining ability (GCA) for female and male, specific combining ability(SCA), GCA by site interaction, SCA by site interaction, and plot-to-plot...

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