Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: "Mathematical analysis and comparison of growth fluctuations of the aerial system of young Terminalia superba Englers et Diels (Combretaceae). | 202s Ann. Sci. For. 1989 46 suppl. 202S-205S Forest Tree Physiology E. Dreyer et al. eds. Elsevier tNRA Mathematical analysis and comparison of growth fluctuations of the aerial system of young Terminalia superba Englers et Diels Combretaceae p. Maillard1 M. Jacques1 E. Miginiac1 and B. Millet2 1 Instituted Physiologie Végétale Phytotron CNRS Gif-sur-Yvette 91190 and 2 Laboratoire de Botanlque Institut des Sciences Naturelles pl. Leclerc Besanẹon 25030 France Introduction Under natural conditions Terminalia superba is a tropical forest tree which shows fluctuations in growth rate and in flushing behavior Groulez and Wood 1984 . This behavior and particularly the periodic growth cessations were concomitant with the dry season. This rhythmical growth pattern ends in a monopodial main axis and a particular stratified branch system as described by Halle and Olde-man 1970 in Aubreville s model. In climate chambers at Phytotron Gif-sur-Yvette we determined the best growth conditions for young T. superba Maillard et al. 1987 . Under these conditions 27 c 16 h we noted fluctuations in the aerial growth. Thereafter the purpose of our work was the detailed study of the early developmental stages of this tree. Growth fluctuations were analyzed on young T. superba using the Fourier method and rhythmical components of growth were evaluated. The growth relationships between shoot and branches and their effects on tree architecture have been investigated. Materials and Methods Materials T. superba seeds originating from Sibiti Congo obtained from the Centre Technique Forestier Tropical Nogent-sur-Marne ref. . 82 3808 N were used for the experiment. Measurements were made over 1 yr on 3 mo old seedlings in a controlled and conditioned glasshouse 27 c 16 h photoperiod and 70 humidity at Phytotron Gif-sur-Yvette. The Fourier method We used the method of Assaad 1985 . The fluctuations of individual growth curves obtained from weekly data were studied the polynomial regression
