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

... 511 c  INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2006033 Original 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 the lowest mean and total leaf areas in seedlings of Mediterranean oaks (Fig. 3). The reduction in...

Ngày tải lên: 07/08/2014, 16:20

... time longleaf pine seedlings are in the grass stage and increase height growth, 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 before planting. In both sites, tall bare-root plants (1−2m)wereusedtomini- mize deer damage and were planted with a 3 × 3 m spacing. In the beginning of June 2004, six diff...

Ngày tải lên: 07/08/2014, 16:20

... xylem cross-sectional area and leaf area measured in altogether 700 olive shoots and branches (B). tween 20 and 220 m 2 per tree) in the given stand. Variation occurring in leaf area density per layer ... cm 2 )they continued growing in length and width in a similar rate. The al- A B Figure 10. Radial pattern of leaf area density (LAD rad ) and total leaf area per...

Ngày tải lên: 07/08/2014, 16:21

... passive, non-powered and continuously operating tent-like trap. Its height is 2 m and collecting surface is approximately 6 m 2 . 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...

Ngày tải lên: 07/08/2014, 03:22

... 2.38 2.14344 deviation from 3 significant insignificant insignificant insignificant insignificant significant insignificant insignificant insignificant insignificant insignificant insignificant half-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 d...

Ngày tải lên: 07/08/2014, 03:22

... (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 METHODS Site 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 va...

Ngày tải lên: 07/08/2014, 03:22

... 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 includi...

Ngày tải lên: 07/08/2014, 03:22

... 149 derplantings 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 i...

Ngày tải lên: 07/08/2014, 10:21

... 3 ◦ 41’ –3 ◦ 47’ W within the province of Madrid (Spain) included Holm oak formations spanning from open woodlands to closed forests with basal area, canopy height and stem density values within the range observed ... (Fig. 1). Some minor recreational activities are currently taking place in the area together with marginal live- stock grazing, an increasingly common situation in...

Ngày tải lên: 07/08/2014, 16:20

... 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 by adding parental general combining ability estimates to the estimated within-family value (Aw). Within-family value (Aw) for each tree is obtained from solving the mi...

Ngày tải lên: 07/08/2014, 16:20