Báo cáo lâm nghiệp:" Variation in the decay resistance and its relationship with other wood characteristics in old Scots pines" ppsx

... 6215648902. Contribution to the knowledge of Clethrionomys glareolus populations in forests of managed landscape in Southern Moravia (Czech Republic) J. S Faculty of Forestry and Wood Technology, ... found in southern Moravian forests as exerted by the bank vole gnawing the stems of young trees. In controlled forests 40% of young o...

Ngày tải lên: 07/08/2014, 03:22

... 2003 SP 26 028 OC 04 Modification of Utility Properties of Wood Materials and Extension their Using. Analysis of the production potential of raw wood in the forests of Slovakia R. P, J. M National ... in the area dis- tribution of age classes occurred mainly due to the realization of regeneration felling, including salvage felling in the sta...

Ngày tải lên: 07/08/2014, 03:22

... COMMUNICATION Perception of the forest by the villagers of the Salonga National Park in the Democratic Republic of Congo J. M. I Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry ... Proposal of a sustainable management of the Salonga National Park in the Democratic Republic of Congo. [Ph.D. ...

Ngày tải lên: 07/08/2014, 03:22

... in the framework of long-term programmes using the clonal propagation (J et al. 1994); their re- Evaluation of the growth and health status of selected clone mixtures in comparison with ... exposed locations where their observation continues and their growth and health status are compared with the ordinary planting stock of genera...

Ngày tải lên: 07/08/2014, 03:22

... respect to damage to forest stands. In the present paper, the population dynamics of As is described in larger forest complexes of southern Moravia depending on the biotope and food supply including ... (Apodemus sylvaticus) . Journal of Zoology (London), 198: 83–102. SUCHOMEL J., 2007. Contribution to the knowledge of Clethrionomys glareolus populatio...

Ngày tải lên: 07/08/2014, 03:22

... Republic, Project No. 2B06068, and the Research Intention of ISBE AS CR, Project No. AV0Z60870520. Influence of stand density, thinning and elevated CO 2 on stem wood density of spruce I. T 1 , ... cultivation. Stand density of two subvariants (s – sparse with ca 5,000 trees/ha and d – dense with ca 10,000 trees/ha) and thinning impact (intensit...

Ngày tải lên: 07/08/2014, 03:22

... zone rings of early and late wood are contained, the Variation of conducting area in stems of European larch (Larix decidua) growing in fresh mixed coniferous forest and fresh mixed forest ... classes in age class IV in fresh mixed coniferous forest (A) and fresh mixed forest (B) sites Fig. 9. A comparison of characteristic...

Ngày tải lên: 07/08/2014, 10:21

... Brno, in the vicinity of the Brno Dam, and the second area (area B) was situated northeast of Brno, on the southern border of the for- est ground belonging to the Křtiny Training Forest Enterprise ... for testing the aforementioned GPS JUNO ST, as the accuracy quoted by the manufacturer is 1 to 5 m after post-process correction. Table 1. List of testi...

Ngày tải lên: 07/08/2014, 10:21

... suitable machinery, and in using acceptable methods for the employment of machines with the rational performance. Pos- sibilities to determine the rational performance of machines are further ... of reaching its design performance have to be considered. Possibilities of increasing the design performance of forest systems: – Increased material flow range...

Ngày tải lên: 07/08/2014, 10:21

... periodically. e utilization of productive growth space of the virgin forest by particular tree species and the share of the tree species in the total crown canopy in tree layers were calculated according ... mechanism, the trees of the previous generation are dying off, including fir. Dynamics of diameter structure in natural forest To exp...

Ngày tải lên: 07/08/2014, 10:22

... University of Cracow. Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions of the Beskid Sądecki mountain range (southern Poland) J. S 1 , ... estimation of variation of the tree form factor for all data within individual provenances was done in several stages. Since...

Ngày tải lên: 07/08/2014, 10:22

... explained by the higher values of photosynthetic capacity and intermediate level of stomatal conductance meas- ured in the trees of this stand. Leaf nitrogen concentration on an area basis appeared ... likely the main cause of the changes in photosynthetic capacity observed among maritime pine stands. Having acknowledged that the differential fertilisation of...

Ngày tải lên: 08/08/2014, 00:22

... properties of the wood, and thus quantify the importance of the individual factors contributing to the natural durability of Scots pine wood. The variation in the in vitro decay rate, and in the extractive ... that the mass loss in the periphery part of the heartwood was lower than that in the centre of the heartwood. The other marked dif- fer...

Ngày tải lên: 08/08/2014, 01:21

... Original article Variation in the composition and content of ellagitannins in the heartwood of European oaks (Quercus robur and Q petraea). A comparison of two French forests and ... identification of nine of these 12 ellagitannins (fig 1). Purified samples of vescalagin, castalagin, grandinin and roburin A (kindly p...

Ngày tải lên: 08/08/2014, 18:21

... after the leaf area index (Nizinski and Saugier, 1988; 1989a, b). We thus decided to study the effect of leaf age on stomatal resistance and on the morphology of the leaf ... ma- ture oak forest. Agric. For. Meteorol. in press

Ngày tải lên: 09/08/2014, 04:20