Báo cáo lâm nghiệp: "Beech (Fagus sylvatica L ) – Technological properties, adhesion behaviour and colour stability with and without coatings of the red heartwood" ppsx

... significantly prevent the general yellowing of the surfaces nor influence the general convergence in colour of the red- hearted beech and normal beech. The investigated samples with and without red ... [4]. The CIELAB colour space is composed of a lightness value L* , a green- ness-redness value a* on the abscissa and blueness-yellowness value b* on the...

Ngày tải lên: 08/08/2014, 00:22

... to lower values in the leaf blades and petioles than in the stem. Petioles may embolise while water potential is still not critical in the shoots. The leaves dry and abcise strongly limiting transpiration ... s –1 m –1 MPa –1 ) 12.36 ± 1.52 (a) 9.56 ± 1.07 (b) 5.43 ± 2.46 (c) D. Lemoine et al.Xylem acclimation in beech Original article Beech (Fagus sylvatica...

Ngày tải lên: 08/08/2014, 14:21

... associated with loss of viability of stored desiccation-tolerant and desiccation sensitive Leeds, in: Kigel J., Galili G. (Eds .), Seed development and germi- nation, Marcel Dekker Inc., New York, Basil, ... seedling number (GC) and number deteriorated seeds (RS) and dormant seeds (DS) for four cold storage duration and two gibberellic acid treatments (GA). Values are means...

Ngày tải lên: 08/08/2014, 01:22

... the other hand, the real aptitudes of the clones in situ may only be proved during a real outbreak of the sawfly. However, an earlier mortality and a slower development ... natural climatic conditions, the lack of synchronization between reared insect and natural insect generations, the natural parasites and the distance between t...

Ngày tải lên: 08/08/2014, 18:22

... cette évolution. Elle montre en effet, au niveau des percolats dans le sol, un parallélisme avec celle de l aluminium. Elle est l inverse de celle du pH et du calcium (N y s, ... (Quercus sessiliflora Salisb .) et de quelques hêtres (Fagus sylvatica L. ). Le taillis âgé de 31 ans (en 198 1) est composé de sorbier (Sorbus aucupari...

Ngày tải lên: 09/08/2014, 02:20

... l axe factoriel fl en projetant sur celui-ci les 9 variables de milieu reflétant la structure du peuplement ligneu!c (fig. 5). La coordonnée de chacune d’elles est alors ... ou complexes. L influence de telle ou telle variable de milieu sur les variations de composition floristique peut être appréhendée de façon simple en calculant pour chaq...

Ngày tải lên: 09/08/2014, 02:21

... mutuelle collaboration par le professeur W. L IESE (Allemagne fédérale, président en charge de 1’I.U.F.R.0 .) et le docteur M. M ATSUI , directeur de l Institut national de ... sont l anglais, l allemand et le français. Outre de nombreuses réunions partielles qui se succèdent à cadences variables, l Union internationale tient congrès mondial et...

Ngày tải lên: 09/08/2014, 06:21

... expliquer ce paradoxe : celle suivant laquelle les témoins auraient une texture particulièrement forte est la plus vraisemblable, et ce d’autant qu’elle recoupe les résultats ... leur axe) et dans le sens longitudinal (où elle peut, soit les scctionncr paral- l lement à celui-ci, soit les écarter les unes des autres à la manière d’un coin). P...

Ngày tải lên: 09/08/2014, 06:21

... article presents a physical model of the total evaporation and water balance of two types of forest canopies, one of beech (Fugus silvntica L. ), the other of Douglas ... forestier, l un de hêtre (Fllg llS V ilvalica L. ), l autre de Douglas (Pveiidotsiigti Meizziesii). Il utilise des mesures météorologiques de routine couramment di...

Ngày tải lên: 09/08/2014, 06:21

... historical periods indicate the diversity and intensity of multiple needs; they also demonstrate the importance of spiritual values and of social and political realities. Some changes resulting ... social values and needs, eco- nomic potential and political regulations. In general all forests, including those considered to be forests close to the natural state, have...

Ngày tải lên: 07/08/2014, 03:22