Báo cáo lâm nghiệp: "Optimisation des relations entre transpiration et photosynthèse Observations à propos des méthodologies d’étude" pdf
Báo cáo lâm nghiệp: "Optimisation des relations entre transpiration et photosynthèse. Observations à propos des méthodologies d’étude" pdf
... g, à l’aide de l’équation (2) pour chaque jeu de conditions expérimentales. Optimisation des relations entre transpiration et photosynthèse. Observations à propos des méthodologies ... et les critiques constructives faites à propos du manuscrit. Summary Optimization o/ the relations between transpiration and photosynthesis. Observations...
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
... comprises entre 500 et 800 m. Re! /<- 22 mars 1985. Acce l ne le /4 mni 1985. Remerciements Nous tenons à exprimer nos remerciements au Centre d’Etudes de Recherches et de Formation ... phytusociologic et en écologie. Application à des données de l’étage subalpin des Alpes-Maritimes. I. L’analyse des données floristiqties. II. L’analyse...
Ngày tải lên: 09/08/2014, 06:21
Báo cáo lâm nghiệp:"Optimisation of inoculation of Leucaena leucocephala and Acacia mangium with rhizobium under greenhouse conditions" docx
... l’inocula- tion des arbres avec leurs symbioses racinaires : Synthèse d’une sélection d’essais au champ en zone tropicale, Bois et Forêts des Tropiques, 223 (1990) 24–42. [4] Dagnélie P., Théories et méthodes ... inoculation avec des cutures bactériennes contenant 10 10 à 10 9 bactéries par millilitre sont les conditions optimales pour avoir une nodulation et une croissance ma...
Ngày tải lên: 08/08/2014, 01:21
Báo cáo lâm nghiệp: "Quercus canariensis Willd : variations saisonnières et stationnelles des teneurs en éléments minéraux des feuilles en Kroumirie (Tunisie)" potx
... cette zone d’altitude (tableaux XII et XIII). Interrelations entre éléments minéraux L’examen comparé des courbes des fi- gures 2 et 3 montre une assez bonne sy- nergie entre ... ligne et les relevés phytosociolo- giques en ordonnée. Cette ordination per- met d’opposer de part et d’autre de l’axe 1 les stations de basse altitude et celle...
Ngày tải lên: 08/08/2014, 18:21
Báo cáo lâm nghiêp: "Optimisation du sciage du pin , maritime" pot
... professionnels, quatre possibilités de tronçonnage à des hauteurs différentes, compte tenu des longueurs des produits à tirer, ont été retenues. Ces découpes sont : - charpente (6 ... tableau 1 des produits à obtenir a été établi avec les scieurs landais et à partir du tableau des sections standards du pin maritime. (I) Ces dimensions...
Ngày tải lên: 09/08/2014, 06:21
Báo cáo lâm nghiệp: " Growth of wild cherry (Prunus avium L.) in a mixture with other species in a demonstration forest" ppsx
... Acer platanoides, Fraxinus excelsior (L- 1988; R et al. 1999; P 2007). However, despite of its fast initial height growth the wild cherry appears to be a weak competitor towards ... (S 1994). Recommended target trees/ha are in that way only 51, which is less than one target tree per our sample plots (100 m 2 ), supposing that the crown diameter will be about 10 m...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Changes in Austrian pine forest floor properties in relation with altitude in mountainous areas" pdf
... (G 1974). Organic mat- ter content was determined by Loss on ignition method (G 1974). e determination of total N was car- ried out by Kjeldahl method at the Tecator Kheltec Auto Analyzer ... contents show better decomposition rates at higher sites regardless of the altitude induced climatic changes. We assume that the forest floor accumulation under tree canopies provides a bet...
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
... C road × (4 C net ) S = √ –––––––––––––––––––––– (3) V × C travel Therefore the correction factor consists of a constant of 4 and the network correction factor as C net . e network correction ... equation can be adapted by introducing Segebaden’s network correction factor C net (H- 1997). e formula becomes as: 40,000 × C road × C net S = √ –––––––––––––––––––––– (2)...
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
... effects on the retardation and prolongation of the spring snow melting. Similar results were also proved in later studies (M et al. 1997; H, Š 2007; H et al. 2007). Generally, ... the beech stand. e smallest parameters of snow were mostly found in the spruce stand. Nevertheless, differences in both parameters of the snowpack both between the stands ... that...
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
... (40×60m). Detailed description of permanent re- search plots is given in M et al. (2010). Methodology e structure of forest stands was evaluated by standard dendrometric methods. Within ... stand with Oxalis acetosella). Soil type is modal Cambisol. e ground vegetation cover is low (30%) and is dominated by Oxalis acetosella. us, the competition of herbal vegetation for...
Ngày tải lên: 07/08/2014, 10:21