Báo cáo lâm nghiêp: "Subdivisions de la forêt de bois de couleur à l’île de la Réunion" pdf
Báo cáo lâm nghiệp: "Optimisation des relations entre transpiration et photosynthèse. Observations à propos des méthodologies d’étude" pdf
... septembre 1984 relatives à Ecouv p s. on a également déterminé oF :B/og s en l’assimilant à la valeur de la pente de la relation entre F! et g,. Les valeurs de 3TR/ 3 F:B ... température de l’air égale à 20 &dquo;C, éclairement au niveau des rameaux correspondant à une densité de flux de photons de 460 iti-nol - m- 2 . s-1...
Ngày tải lên: 09/08/2014, 06:21
Báo cáo lâm nghiêp: "Subdivisions de la forêt de bois de couleur à l’île de la Réunion" pdf
... la forêt complexe de basse altitude ; - la forêt complexe de moyenne altitude ; - la forêt trc, hygrophile de haute altitude. (1) La nomenclalure utilisée est celle de ... (espèces accidentelles incluses) en ne prenant en compte que la seule présence-absence des espèces. Subdivisions de la forêt de bois de couleur à l’île de...
Ngày tải lên: 09/08/2014, 06:21
Báo cáo lâm nghiệp: "Inventaires successifs en forêt : intérêt théorique et limites pratiques de l’échantillonnage partiellement renouvelé" potx
... de E(X1), à la date t2, est peu intéressante et la prévision de E(X2), à la date tl, ne relève pas des seules méthodes d’échantillonnage. On se placera donc à la date ... deux peuplements de Chêne sessile, servant à la comparaison de deux normes d’éclaircie, cartographiés pied par pied et mesurés à plusieurs reprises, on a sim...
Ngày tải lên: 09/08/2014, 06:21
Báo cáo lâm nghiệp: "Distributions qualitative et quantitative des éléments nutritifs dans un jeune peuplement de Pin maritime (Pinus pinaster Ait" docx
... 1986. Effets de la sylviculture moderne sur la répartition, le niveau et l’état du stock organique des sols de la pin de des Landes de Gascogne. Thèse de 3’ cycle, ... pour la construction de deux types de tarifs permettant de passer, pour les premiers, de la minéralomasse d’un échantillon de branches à celle de la couronne...
Ngày tải lên: 09/08/2014, 02:20
Báo cáo lâm nghiệp: "Changes in Austrian pine forest floor properties in relation with altitude in mountainous areas" pdf
... floor accumulation under tree canopies provides a better decomposition relying on the microclimatic environment mediated by tree canopies, in spite of the altitude. Keywords: altitude; Pinus ... production and accumulation in Pinus patula plantations of the Mpumalanga Province, South Africa. Plant and Soil, 203: 183–190. DAVIS P.H., 1984. Flora of Turkey and the East Aegean Islands. Volu...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: " Comparison of three methods to determine optimal road spacing for forwarder-type logging operations" pdf
... geometric redefinition of the classical road and landing spacing model through shifting. Journal of Forest Science, 29: 670–674. DYKSTRA D.P., 1983. Fundamentals of forest road design and layout. ... (1942) and S (1976) use similar assumptions to derive their ORS formulas. Comparison of three methods to determine optimal road spacing for forwarder-type logging operations M. R. G...
Ngày tải lên: 07/08/2014, 04:20
Báo cáo lâm nghiệp: "Analysis of snow accumulation and snow melting in a young mountain spruce and beech stand in the Orlické hory Mts., Czech Republic" pptx
... 1984. Der Ein- fluss des Waldes und der Landnutzung auf die Schnee - ansammlung und Schneeschmelze in den Hessischen Mittelgebirgen. In: Schneehydrologische Forschung in Mitteleuropa. Hann. Münden ... accumulation (12. 2. 2006 to 5. 3. 2007) e first snow was recorded in the experimental stands as well as in the open area at the beginning of the second decade of December 2006 (snow depth...
Ngày tải lên: 07/08/2014, 04:20
Báo cáo lâm nghiệp: "Structure and development of forest stands on permanent research plots in the Krkonoše Mts" pdf
... sylvatica, Sorbus aucuparia, Acer pseu- doplatanus, A. platanoides, Ulmus glabra, Quercus petrae, Betula pendula J. FOR. SCI., 56, 2010 (11): 518–530 529 cades the spatial pattern of the parent stand ... relation to abovementioned stand types and par- ticular developmental phases were evaluated. On extreme sites after air pollution calamity, at- tributes of large developmental cycles still...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Phenology of four broad-leaved forest trees in a submountain beech forest" pptx
... ending of the vegetation period. A decrease in chlorophyll contents in the assimilatory apparatus is evident, thereby there is a change in the colour of leaf blade. Excluding the biological characteristics ... in 1998, the latest one was detected in 1999. In 1998, there was an evident de cit of soil moisture at the beginning of autumn (70% amount of the long-term normal) with a clear...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Effects of spruce, beech and mixed commercial stand on humus conditions of forest soils" pdf
... occurred under the beech stand. When comparing particular layers their reserves de- creased from the H layer towards the L layer of litter. e highest accumulation of humus in the H layer occurs ... 6 Spruce forest stand Beech forest stand Mixed forest stand pH layer L layer F layer H Ah Mixed Beech Spruce forest forest forest stand stand stand 0 1 2 3 4 5 6 Spruce forest stand Beech...
Ngày tải lên: 07/08/2014, 10:21