Báo cáo lâm nghiệp: " Root system development and health condition of sycamore maple (Acer pseudoplatanus L ) in the air-polluted region of Krušné hory Mts" ppt

... (1 0): 452–461 JOURNAL OF FOREST SCIENCE, 53, 2007 (1 0): 452–461 Root system development and health condition of sycamore maple (Acer pseudoplatanus L. ) in the air-polluted region of Krušné hory ... similarly like the rooting depth and the length of horizontal roots – a Table 4. Vitality and mycorrhizal infection of fine roots St...

Ngày tải lên: 07/08/2014, 04:20

... the intercept of the self-thinning line was examined by adding the site index to the model as an independent variable. The following model for the self-thinning limit was estimated using ordinary ... [23] and the –3/2 power rule of self-thinning [34], a log- log plot of the average tree size and stem density will give a straight self-thinning line of a constant slo...

Ngày tải lên: 08/08/2014, 01:21

... non-stom- atal limitations to photosynthesis. Plant Cell Envi- ron 8, 95-104 Kelly GJ, Latzko E (199 1) Carbon metabolism: on reg- ulation at the cellular level and at the whole plant level, ... Isebrands JG, Tomlinson PT, Dickson RE (199 4) Carbon fixation and allocation in northern red oak. In: Biology and Silviculture of Northern Red...

Ngày tải lên: 08/08/2014, 18:21

... grandifolia on the gently rolling till plains of Ohio and Indi- ana, and with Tilia americana in south- western Wisconsin, northwestern Illinois, northeastern lowa and southeastern ... dramatic increase following early logging and fire. Quer- cus species have also increased in the mid-Atlantic region from land-clearing, the charcoal iron...

Ngày tải lên: 08/08/2014, 18:21

... 7.0% because of the uncertainty in the estimate of the stand level. Using the stand level adjustment (eq [12 ]) when predicting single tree volumes, the relative prediction ... robur L and Q petraea (Matt) Liebl) in Denmark. In the compatible system of stem taper and volume functions the solid of revolution of the stem t...

Ngày tải lên: 08/08/2014, 18:21

... heterophylla) unless burned by wild fires [2]. Forest fire plays an integral role in the ecology and regeneration of lodgepole pine natural stands, particularly for the subspecies latifolia in Rocky ... Mile 451 in the SWB had relatively high gall incidence (3.57 galls per tree) and the Blue River site in BWBS zone had few galls (0.30 galls per tree), but there is only o...

Ngày tải lên: 08/08/2014, 00:21

... of assort- ments. e values of site indexes of individual tree spe- cies showed in general a considerably large vari- ability. Mean values vary in all examined MGFTs similarly (Fig. 2). In the ... unit yields of mixtures, and finally for yield indexes according to the rules of error transmission summarized by Š et al. (200 3). RESULTS AND DISCUSSION The a...

Ngày tải lên: 07/08/2014, 10:21

... et al. 200 6). This is a problem in the whole Beskids region, including also their Polish and Slovak part. In the Polish part of the Silesian Beskids, low content of the basic elements, low ... samples of spruce needles Fig. 4. Ca/Al molar ratio in soil water LH – under the humus horizon, L3 0 – at the depth of 30 cm of mineral soil, L5 0 – at the dept...

Ngày tải lên: 07/08/2014, 10:21

... potential all along the path- way. In addition, the decrease of soil-water content results in an increase of the hydraulic resistance within the soil and at the soil -root interface. As a result of ... over the last years was mainly on the role of forests in the global carbon balance. During the last decade, the importance of the inter- specific diversi...

Ngày tải lên: 07/08/2014, 16:20

... (H) and diameter at root collar (D) including the 16 populations studied. Labelling: Squares, Pinus pinaster; up triangles, P. halepensis; circles, P. canariensis and inverted triangles, P. pinea. ... differences follow those included in Table I, excluding the species code. 94 M.R. Chambel et al. Figure 3. Allometric trajectories for roots (left column) and leaves (right column)...

Ngày tải lên: 07/08/2014, 16:20