Báo cáo lâm nghiệp: "Variabilité naturelle du mélèze. I. Mélèze d’Europe : bilan de 34 ans de test comparatif de provenances" potx

... 57–62 Because of the lack of a recent survey of Cephal- cia species in the Czech Republic, the goals of this study were (i) to monitor web-spinning sawflies liv- ing on spruce in mountainous regions ... species occurrence. Canonical axes explain 65.8% of variability J. FOR. SCI., 53, 2007 (Special Issue): 57–62 59 Table 1. Survey of studied web-spinning sawflies...

Ngày tải lên: 07/08/2014, 03:22

... the Ministry of Agriculture of the Czech Republic, Research Project No. QG 50105. Production and humus form development in forest stands established on agricultural lands – Kostelec nad Černými ... composition). e study was performed in the stands of four tree species on afforested agricul- tural lands, in a neighbouring forest stand on con- tinuo...

Ngày tải lên: 07/08/2014, 03:22

... horizons rather by the reduction of the finest root length than by the reduction of root tips density. CONCLUSIONS The research of fine roots in the intermediate stage of a beech virgin forest ... cells with the dominant function of water and minerals supply. e ratio between the fine root length and the number of root tips is an indicator...

Ngày tải lên: 07/08/2014, 10:22

... from transplanting until September was 229% in untreated controls, 147% in seedlings in which whorl and lateral buds and whorl branch tips had been removed and 79% where whorl and lat- eral buds and whorl branches ... at transplanting: Whorl and lateral buds and whorl branch tips removed A(), whorl and lateral buds and whorl branches removed B (...

Ngày tải lên: 07/08/2014, 16:20

... Spain (Received 15 September 2006; accepted 20 December 2006) Abstract – A dynamic whole-stand growth model for radiata pine (Pinus radiata D. Don) stands in north-western Spain is presented. In ... inventory data are available [4]. A growth model for Pinus radiata D. Don stands in north-western Spain 455 Table I. Summarised data corresponding to the...

Ngày tải lên: 07/08/2014, 16:21

... 10.1051/forest:2007040 Original article End-use related physical and mechanical properties of selected fast-growing poplar hybrids (Populus trichocarpa ì P. deltoides) Lieven De Boever,DriesVansteenkiste,JorisVan ... the variabil- ity in selected physical and mechanical properties of new inter-American poplar clones (P. trichocarpa ì deltoides). As...

Ngày tải lên: 07/08/2014, 16:21

... at: c  INRA, EDP Sciences, 2007 www.afs-journal.org DOI: 10.1051/forest:2007045 Original article Heartwood and sapwood variation in Eucalyptus globulus Labill. trees at the end of rotation for ... 29]. The initiation and rate of transformation of sapwood into heartwood are explained by several theories, namely that it is the amount of sapwood, e.g...

Ngày tải lên: 07/08/2014, 16:21

... leaves of both clones. For the two clones, use of inhibitors allowed identification of one Fe-SOD, one Mn-SOD and two Cu/Zn-SOD (Fig. 2A). In control condi- tions, main isoforms were Fe-SOD and ... limited participation of this class of molecules during drought [10]. The objective of the present investigation was to focus on the res- ponse of some of the leaf en...

Ngày tải lên: 08/08/2014, 00:22

... 10.1051/forest:2004054 Article original Propriétés physiques du bois d'éclaircie des cèdres (Cedrus atlantica), contenant du bois de compression, provenant de l’Atlas du Djurdjura (Algérie) Mahand MESSAOUDÈNE a , ... statistique descriptive des propriétés physiques est appli- quée aux moyennes des 54 arbres des trois populations. Les fluctua- t...

Ngày tải lên: 08/08/2014, 01:22

... dehors de l’aire naturelle. Selon les objectifs pour- suivis, le mélèze des Sudètes sera préféré Article original Variabilité naturelle du mélèze. I. Mélèze d’Europe : bilan ... conclusions par une synthèse des résultats majeurs des tests de comparaison de provenances de mélèze d’Europe dans les pays voisins. MATÉRIEL ET MÉTHODES L...

Ngày tải lên: 08/08/2014, 18:21

... Article original Variabilité naturelle du mélèze. II. Mélèze du Japon : bilan de 36 ans de test comparatif de provenances LE Pâques Station d’amélioration des arbres forestiers, ... Les performances à 36 ans de 12 provenances de mélèze du Japon parmi les 25 test es dans le réseau international lufro sont présentées part...

Ngày tải lên: 08/08/2014, 18:21

... article Variabilité des nutriments foliaires de Quercus suber L dans différentes situations écologiques dans le massif des Maures (Var, France), et relations avec la production ... la meilleure production de liège et la placette la plus sèche perturbée qui donne les cernes les moins épais. L épaisseur du liège femelle...

Ngày tải lên: 08/08/2014, 18:21

... importants en exposition Sud (B 1 2 2) avec une notation moyenne de 84. La pourriture du cœur de l’Epicéa, Picea abies (L.) Karst. en Auvergne. Etude écologique E. BENIZRY Labora G. ... unteindischen Eintrittspforten der wichtigsten Rotfân- kerreger hei der Fichte (Picea abies) . Forstwiss. Cbl. 88, 281-308. E VERS F.H., 1...

Ngày tải lên: 09/08/2014, 02:20

... sont encourageants dans la mesure où ils lais- sent penser que la culture du chêne rouge est possible sur des sols d carbonatés en surface sur au moins 30 cm. Il est d’ailleurs ... la surface des pots, des carpophores sont apparus qui appartenaient essentiel- lement à l’espèce Laccaria laccata. L’influence du calcaire sur la survie e...

Ngày tải lên: 09/08/2014, 04:20

... fréquence attendue -, F;, d’un gamète C- issu d’un croisement Ci est donnée par : _ 3 (1) Cf. : Bn R nonT et al. Les terpènes du pin maritime. Aspects biologiques et génétiques. VII ... MA RPEAU A., P AUL Y G., 1972. Les terpènes du pin maritime : aspects biologiques et génétiques. Il - Hérédité de la teneur en mono- terpènes. An...

Ngày tải lên: 09/08/2014, 06:21