Báo cáo lâm nghiệp: "Modélisation des distributions des paramètres dendrométriques d’une espèce ligneuse dominante en peuplement naturel" pdf

... original Modélisation des distributions des paramètres dendrométriques d’une espèce ligneuse dominante en peuplement naturel Houédougbé Noël FONTON*, Anthelme A. Prosper SAGBO Centre de Biométrie ... dominance de la densité en raison du fait qu’il s’agit de l’aménagement des peuplements naturels. En effet, la surface terrière renseigne mieux sur le potentiel ligneu...

Ngày tải lên: 08/08/2014, 01:22

... bio- logique, principalement celle des enchytréides. En consé- quence comme le précisent Jabiol et al. [19] les caractéristiques morphologiques des humus forestiers deviennent des indica- teurs du ... homologues pré- sentent des teneurs en lignine qui ne sont pas significativement différentes. Cela suggère que dans les sols à humus de type moder des peuplements âgés de la chrono...

Ngày tải lên: 08/08/2014, 01:22

... altitudes concluding lower nutrient and organic matter contents in forest floor litter. at argument has been challenged with the assumption that the nutrient retranslocation requirement de- creases ... and modest soluble nitrogen content. In our study we recorded organic matter contents between 85.0–76.3% and 54.4–20.9% in L + F and H layers at the altitudinal order (Table 3). OM conte...

Ngày tải lên: 07/08/2014, 03:22

... S 2 1 Department of Forest and Soil Sciences, Institute of Forest Engineering, University of Natural Resources and Applied Life Sciences, Vienna, Austria 2 Department of Forest Engineering, ... Science, 24: 209–217. PICMAN D., PENTEK T., 1998. e influence of forest roads building and maintenance costs on their optimum density in low lying forests of Croatia. In: Seminar on Environm...

Ngày tải lên: 07/08/2014, 04:20

... the fi rst year of measurement low with decreasing tendency.  e downgrading was even faster after 1985. Table 6 presents growth variables after spon- taneous development for the whole stand formed ... is rather independent on their dbh, the stand forms expressed horizontal canopy.  e height of trees is between 20 and 25 m. Also crown height and crown length have no dependen- cy on the...

Ngày tải lên: 07/08/2014, 10:21

... soil environment and, vice versa, plant com- munities at the given site are directly dependent on the soil environment quality. In recent decades, the Supported by the Internal Grant Agency ... decomposi- tion of plant and animal material and the subsequent release of nutrients into the soil environment occur can be considered to be fundamental. Differentia- tion of forest floor horizons –...

Ngày tải lên: 07/08/2014, 10:21

... seasons, insignificant difference between LSF and AF on Q. robur in some seasons and permanent insignificant difference between LSF, SF and AF on Q. rubra. Acknowledgements We would like to thank ... Sciences, Czech University of Life Sciences in Prague, Prague, Czech Republic 2 Department of Zoology, Comenius University, Mlynská dolina, Bratislava, Slovakia ABSTRACT: e differences between ....

Ngày tải lên: 07/08/2014, 10:22

... 1–11. [30] Magnussen S., Growth differentiation in white spruce crop tree pro- genies, Silvae Genet. 42 (1993) 258–266. [31] Matheson A.C., Raymond C.A., The impact of genotype × environ- ment interactions ... area-weighted wood density for Flynn and Rennick site. was achieved at age 8 at Rennick. Early selection efficiency was even higher for MFA (Fig. 15). Early selection at age 4 at Flynn and...

Ngày tải lên: 07/08/2014, 16:20

... l’élevage en pépinière. Nous discutons aussi du rôle des différences écophysiologiques entre les espèces dans la représentation biaisée des espèces dans les plantations. Q. robur / Q. petrea / peuplement ... naturelles, les hybrides représentent 1 % à Legnica et 8 % à Jamy. Ces différences pourraient résulter soit d’une sélection indirecte involontaire des glands lors de la récolte...

Ngày tải lên: 07/08/2014, 16:21

... d’état correspondantes du peuplement à n’importe quel moment. Ces équations ont été ajustées en utilisant la méthode des variables indicatrices indépendantes de l’âge. En plus, le modèle incorpore ... Galicia Résumé – Un modèle de croissance pour des peuplements de Pinus radiata D. Don du nord ouest de l’Espagne. Un modèle dynamique de croissance de peuplement est présenté pour Pi...

Ngày tải lên: 07/08/2014, 16:21