Báo cáo lâm nghiệp: "End-use related physical and mechanical properties of selected fast-growing poplar hybrids (Populus trichocarpa × P. deltoides)" potx

... differences in the root system development and health condition were found either between the trees of identical height from self-seeding and from planting in the region of Krušné hory Mts. and in the ... 452–461 JOURNAL OF FOREST SCIENCE, 53, 2007 (10): 452–461 Root system development and health condition of sycamore maple (Acer...

Ngày tải lên: 07/08/2014, 04:20

... 266–270 Forest visitors’ opinions on the importance of forest operations, forest functions and sources of their financing L. Š Faculty of Forestry and Wood Sciences, Czech University of Life ... opinions on forest functions, on the importance of forest operations and on sources of financing for- est functions. e questions in th...

Ngày tải lên: 07/08/2014, 10:21

... role in projecting future multi-functional forests is to harmonize the requirements for the Forest yield index and its applicability to the assessment of future forest yields L. K 1,2 , ... Examples of relative yield assessment in assumed conditions of even-aged, fully stocked forest stands, for the main types of target forests and most fre...

Ngày tải lên: 07/08/2014, 10:21

... of the 1990s. Forest soils showing the insufficiency of main nutrients remain today as the main factor affecting the forest vitality. e situation in the soil is subsequently reflected in the nutrition ... of the decline of Norway spruce (Picea abies [L.] Karst.) stands in Jablunkov, with a focus on air pollution load, and the state of forest soil and nu...

Ngày tải lên: 07/08/2014, 10:21

... forest trees and stands under severe drought: a review of ecophysiological responses, adaptation processes and long-term consequences Nathalie B ´  a * ,RolandH  b , André G a ,ErwinD a a UMR ... daily data) and of relative extractable soil water (REW) in: (a) beech stands (Soroe, Hesse and Hainich), (b) coniferous stands (Thara...

Ngày tải lên: 07/08/2014, 16:20

... I. Radius and Growth Strains (ì10 6 ) mean value of tension wood and opposite wood zone from the ten studied trees. Radius Radius GS mean GS mean Family Genus species author of TW of OW value ... to poplar trees, Ann. For. Sci. 60 (2003) 371–378. [17] Coutand C., Jeronimidis G., Chanson B., Loup C., Comparison of mechanical properties of tension and oppos...

Ngày tải lên: 07/08/2014, 16:21

... 10.1051/forest:2007040 Original article End-use related physical and mechanical properties of selected fast-growing poplar hybrids (Populus trichocarpa ì P. deltoides) Lieven De Boever,DriesVansteenkiste,JorisVan ... the variabil- ity in selected physical and mechanical properties of new inter-American poplar clones (P. trichocarpa ì deltoides). As...

Ngày tải lên: 07/08/2014, 16:21

... 2005 DOI: 10.1051/forest:2005008 Original article Managing diameter growth and natural pruning of Parana pine, Araucaria angustifolia (Bert.) O Ktze., to produce high value timber Leif NUTTO a , Peter ... present work was to analyse diameter growth and the relationship of natural pruning and various morphological characteristics of Para...

Ngày tải lên: 08/08/2014, 00:21

... higher in the west of the mountain crest than in the eastern side, leading at a value of –20 mm of WB deficit in June for 400 m of altitude in the west side of the crest and 550 m of altitude in the ... (soil conditions) and physical (climatic) variables that most strongly influence tree species composition in the forests of the Vosges Mount...

Ngày tải lên: 08/08/2014, 00:22

... sativa in the Castelli Romani Park, due to the favourable climatic and soil conditions for the species. Although the intensive exploi- tation of this area, the analysed coppice showed the great capac- ity ... indicator of potential productivity in response to changing factor [23, 25, 26, 42]. The analysis of the physiological traits trend underlined the impo...

Ngày tải lên: 08/08/2014, 00:22

... late winter to early summer, and eat foliage, shoots and acorns of oaks in summer and autumn [20]. We have carried out two different studies in these rangelands to assess the effect of post-fire natural and ... Mediterranean oaks with contrasting leaf habit after a wildfire Josep Maria E * , Abdessamad H ,JavierR Centre de Recerca Ecològica i...

Ngày tải lên: 08/08/2014, 00:22

... tremuloides and the resultant canopy gaps formed, appear to be critical for P. glauca regen- eration in mature and old stands. Natural regeneration may be enhanced by taking advantage of the advanced regeneration during ... Recruitment pattern of P. glauca seedlings changed along the chronosequence. L(t) analysis (Fig. 4) showed that the spatial distribution...

Ngày tải lên: 08/08/2014, 01:22

... online: www.edpsciences.org Wood technology of Atlas cedar from Southern Italy 613 Original article Natural durability, physical and mechanical properties of Atlas cedar (Cedrus atlantica Manetti) wood from Southern ... Physical and mechanical characteristics The results of physical and mechanical characterisa- tion of Atlas cedar...

Ngày tải lên: 08/08/2014, 14:20

... even in the absence of fire. ECOPHYSIOLOGICAL ATTRIBUTES OF EASTERN OAK SPECIES The studies reviewed in the previous sec- tions indicate that eastern oak species have expanded ... on the gently rolling till plains of Ohio and Indi- ana, and with Tilia americana in south- western Wisconsin, northwestern Illinois, northeastern lowa...

Ngày tải lên: 08/08/2014, 18:21

... canopy conductance and stand transpiration of an oak forest from sap flow measurements A Granier, N Bréda Équipe bioclimatologie et écophysiologie, unité d’écophysiologie forestière, Centre ... Weir PL (1992) Tran- spiration and canopy conductance in a pristine broad- leaved forest of Nothofagus: an analysis of xylem sap flow and...

Ngày tải lên: 08/08/2014, 18:21