Báo cáo lâm nghiệp: " An overview of ecology and silviculture of indigenous oaks in France" ppt

... class="bi x0 y0 w2 h1 8" alt ="" conditions found in France and especially on the climatic diversity: oceanic, continen- tal and Mediterranean climates with their mountain variants. Pedunculate ... extension, or both. Two of these species are widespread in the hills and plains of the Atlantic and of the mid-European domains: Q petraea (se...

Ngày tải lên: 08/08/2014, 18:21

... expected changes in the position and shape of within-ring density distribution in Sp. The expected change in distribution of within-ring density for one sd increase in ring width is presented in Figure ... (1998) 56–68. Table V. Analyses of covariance (F values and associated probability 1 ) including moment and quantile based parameters and λ function coef- ficients...

Ngày tải lên: 08/08/2014, 00:21

... within trees (1 whorl measured every third whorl, instead of every second in Lorraine) and within stands (3 trees in each stand), whereas the number of stands visited was important (12 stands, 8 ... thickest branch and thinnest one increases as and when the tree grows. • With tree ageing, living whorls also contained dead thin branches contributing to the inflation of the wit...

Ngày tải lên: 08/08/2014, 01:22

... 160 Age of stands [years] Oak Pine Fig. 2. Mean timber values of pine and oak stands at 10-year age intervals Fig. 3. Changes in mean timber values of pine stands at con- secutive 10-year age intervals Fig. ... the basis of indices obtained in similar stands during tending fellings. In older stands, their assortment structure was deter- mined individually for each stand....

Ngày tải lên: 07/08/2014, 03:22

... RCNP has one of the few remaining undisturbed forests in Nepal and is rich in unique flora and fauna. ere are more than 43 species of mammals (including single-horned rhinoceros and the Bengal ... (Bankaria in Nepali language), with some still living within the forest. e Praja and Tamang have been involved in asparagus collection and selling since 1967 (M...

Ngày tải lên: 07/08/2014, 10:21

... consisted of a total of 20 randomly selected plants, chosen for repeated sampling of gas exchange, light absorp- tion, height, leaf number, stem caliper, and canopy width. Of the 20 plants, 10 plants ... L.R., Dominance of interplanted American chestnut (Castanea dentata) in southwestern Wisconsin, USA, For. Ecol. Manage. 191 (2003) 111–120. [22] Keever C., Present composition...

Ngày tải lên: 07/08/2014, 16:20

... (Zululand) E. grandis 18/08/1992 28 ◦ 42’ S 31 ◦ 58’ E 995 21.4 Loamy sand 76 28 5 Nseleni (Zululand) E. grandis 18/08/1992 28 ◦ 41’ S 32 ◦ 04’ E 1232 21.6 Sand 55 66 6 Nseleni (Zululand) E. grandis ... 30 ◦ 26’ E 792 17.2 Sandy loam 929 28 30 Oaklands (Zululand) E. grandis × E. camaldulensis 06/05/2003 28 ◦ 35’ S 32 ◦ 05’ E 1057 21.6 Sand 87 92 31 Oaklands (Zululand) E. grandis × E. camaldul...

Ngày tải lên: 07/08/2014, 16:21

... C. Hoff and S. Rambal fall and leaf quantity [33, 43]. Important then are the timing of rainfall and drought events, the quantity of rainfall, the storage capacity of the soil and quantity and ... ecosystems. In the stands of l’Avic (NE Spain), Sala and Tenhunen [64] found annual totals of 453 mm and 464 mm for LAI values of 4.6 and 5.3, respec- tively. The annua...

Ngày tải lên: 08/08/2014, 01:21

... Newfoundland, Canada (48° 41’42’’ N and 56° 36’ 21’’ W). The trees were growing in a randomized block design with three treat- ments (thinning, thinning and fertilization, root pruning) and a control replicated ... power spectra provides an estimate of group-specific model parameters and their asymptotic gaussian variances and covariances suitable for a discriminant analysis...

Ngày tải lên: 08/08/2014, 01:22

... making monitoring extremely difficult. Discussion and Conclusion The conclusions from the results obtained to date are that production and mainte- nance of haploid tissue lines ... numer- ous levels of cytokinins were tested. The Crandon isolates were viable and callus cultures were established, but organ dif- ferentiation was not obtained. Wiscon...

Ngày tải lên: 09/08/2014, 04:20