Báo cáo lâm nghiệp:"Influence of basic density and temperature on mechanical properties perpendicular to grain of ten wood tropical species" pot

... to examine the effect of the most important climatic factors (tem- perature and precipitation) on the radial increment of selected spruce stands in the Orlické hory Mts. MATERIAL AND METHODS Research ... Influence of temperatures and precipitation on radial increment of Orlické hory Mts. spruce stands at altitudes over 800 m a.s.l....

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

... Foundation, Project No. 070108. Influence of pulverized limestone and amphibolite mixture on the growth performance of Alnus incana (L.) Moench plantation on an acidified mountain site I. K 1 , V. B 3 , ... K., 2002. Biomass production and nutrient accumulation in short-rotation grey alder (Alnus incana (L.) Moench) plantation on...

Ngày tải lên: 07/08/2014, 04:20

... 0002070201. In uence of a planting hole application of dolomitic limestone powder and basalt grit on the growth of Carpathian birch (Betula carpatica W. et K.) and soil chemistry in the air-polluted Jizerské ... this variant. On the other hand, in the basalt and control treatments, the foliar Ca concentrations have...

Ngày tải lên: 07/08/2014, 10:22

... expected change in distribution of within-ring density for one sd increase in ring width is presented in Figure 3. 3.4. Differences among clones in within-ring density Fluctuations in growth rate and within-ring ... relative contribution of clone differences to the overall variation in shape of within-ring frequency distributions of wood density....

Ngày tải lên: 08/08/2014, 00:21

... spp. and Brachipodium pinnatum. The effects of light level and competition on growth and on crown and shoot morphological parameters were assessed for 76 saplings (48 Norway spruce and 28 silver ... traits [13], and possibly in allocation pat- terns, but not to morphological ones. 4. CONCLUSIONS Results of the present study confirm the importance of...

Ngày tải lên: 08/08/2014, 00:21

... Map of projected canopy areas of the investigated Fagus crenata trees in the Naeba Mountains, Japan. The shaded canopies indicate the measurement trees. Table I. General characteristics of the investigated ... Adiku S., Kakubari Y., Influences of environmental factors on the radial pro- file of sap flux density in Fagus crenata growing at...

Ngày tải lên: 08/08/2014, 00:21

... article Influence of flooding on growth, nitrogen availability in soil, and nitrate reduction of young oak seedlings (Quercus robur L.) Badr ALAOUI-SOSSÉ*, Bastien GÉRARD, Philippe BINET, Marie-Laure TOUSSAINT, ... real effect of flooding via nitrogen availability in the soil. During flooding, amino acid contents in taproot of stressed seedl...

Ngày tải lên: 08/08/2014, 00:22

... 319321 â INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2006011 Original article Influence of cross section dimensions on Timoshenko’s shear factor – Application to wooden beams in free-free flexural ... effect of the cross section into account. Numerical shear factor values are calculated according to variations in the height/width ratio of the...

Ngày tải lên: 08/08/2014, 00:22

... article Influence of basic density and temperature on mechanical properties perpendicular to grain of ten wood tropical species Sandrine Bardet a *, Jacques Beauchêne b and Bernard Thibaut a,c a Laboratoire ... function of temperature for one wood species (Dicorynia). Each cross represents one value of the three repetitions. Figure 7. Illustration of...

Ngày tải lên: 08/08/2014, 01:21

... M., Seedling longevity under deep shade in relation to seed size, J. Ecol. 84 (1996) 681–689. [28] Sonesson L.K., Growth and survival after cotyledon removal in Quercus robur seedlings, grown in ... Rydin H., Effects of competition, grazing and cotyledon nutrient supply on growth of Quercus robur seedlings, Oikos 79 (1997) 53–58. [12] Gribko L.S., Jones W.E.,...

Ngày tải lên: 08/08/2014, 01:21

... 781788 â INRA, EDP Sciences, 2005 DOI: 10.1051/forest:2004075 zOriginal article Influence of herbaceous competitors on early growth in direct seeded Fagus sylvatica L. and Quercus robur L. Magnus ... the afforestation of farmland using direct seeding of beech and oak. Firstly, there was no effect of competition from herbaceous vegetation on seedl...

Ngày tải lên: 08/08/2014, 01:22

... intracellular proline concentration in embryogenic cultures subjected to below freezing temperatures The concentration of proline in embryogenic cultures of larch, sitka spruce and oak is shown in ... sitchensis (Bong.) Carr.) Sitka spruce ECs were raised from immature embryos of sitka spruce clones and one cell line (574F) was maintained in sit...

Ngày tải lên: 08/08/2014, 01:22

... 10.1051/forest:2004005 Original article Influence of individual tree and stand attributes in stem straightness in Pinus pinaster Ait. stands Miren DEL RÍO, Felipe BRAVO*, Valentín PANDO, Gemma SANZ, Rosario ... relationship between stem straightness and tree and stand attributes when the competition begins to be important. Straightness of maritime p...

Ngày tải lên: 08/08/2014, 01:22

... mineral content and leaf area (LA) determinations. Environmental conditions (inci- dent radiation [PAR], air and leaf temperature, vapor pressure deficit) during sampling and mesurements ... differences in nutri- ent (N,C,P,K and Ca) and soluble carbohydrate concentrations in leaves of resprouts originated after fire or after tree-fell indica...

Ngày tải lên: 08/08/2014, 18:21