Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế, đề tài:" Prévision de la variabilité intra- et interarbre de la densité du bois de chêne rouvre (Quercus petraea Liebl) par modélisation des largeurs et des densités des bois initial et final en fonction de l’âge cambial, de la largeur de cerne et du niveau dans l’arbre. | Ann Sci For 1996 53 1019-1030 Elsevier INRA 1019 Article original Prevision de la variabilité intra- et interarbre de la densité du bois de chêne rouvre Quercus petraea Liebl par modélisation des largeurs et des densités des bois initial et final en fonction de Page cambial de la largeur de cerne et du niveau dans I arbre R Degron G Nepveu Équipe de recherches sur la qualité des bois Inra 54280 Champenoux France Reẹu le 26 septembre 1994 accepté le 10 octobre 1995 Summary - Predicting intra- and intertree variability of wood density in sessile oak Quercus petraea Liebl through modelling earlywood and latewood width and density from cambial age ring width and height in the tree. The oak wood intraring density being considered as an important criterion of its quality we studied ring microdensitometric components variability earlywood density earlywood width latewood density latewood width . First we considered the intratree variation of density with cambial age ring width and level in tree. We used regression methods to establish models of variation with the variables we had considered and we studied parameters of the different models table II by analysis of variance. Within a tree we showed that earlywood width could be considered as a constant fig 1 and that earlywood and latewood density were only dependent on cambial age fig 2 . For ring width and cambial age given the level in the tree effect was important only on the lowest level of our sampling tables III and IV . We then studied intertree density variations on 24 trees collected in northeastern France table I . We evaluated the site effect and the tree in site effect on the parameters of the models considered beforehand table V . We found a site effect and a tree in site effect on some parameters however these results will have to be carefully assessed because of the relative weakness of our sampling. Nevertheless we can confirm the important wood density variability between trees. variability wood Quercus .
