tailieunhanh - Báo cáo lâm nghiệp:"Effect of tube shelters on the growth of young Turkish pines (Pinus brutia Ten., Pinaceae)"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài:"Effect of tube shelters on the growth of young Turkish pines (Pinus brutia Ten., Pinaceae)" | Ann. For. Sci. 60 2003 549-556 549 INRA EDP Sciences 2003 DOI forest 2003048 Original article Effect of tube shelters on the growth of young Turkish pines Pinus brutia Ten. Pinaceae Céline Leroy Yves Caraglio UMR botAnique et bioinforMatique de l Architecture des Plantes AMAP 2196 Bd. de la Lironde TA40 PS2 34398 Montpellier Cedex 5 France Received 20 August 2002 accepted 24 February 2003 Abstract - Young Turkish pine Pinus brutia Ten. individuals were planting in the Montpellier region with or without tube shelter alternating. The effect of these tubes was determinate thanks to the growth study of the main polycyclic stem several elongation phases separated by rest periods . The analysis was done by a quantitative comparison of successive annual shoots and growth units on individuals of the same age some with tube shelters and some without. The trees grown in tube shelters were taller as a result of a larger number of growth units per annual shoot and longer annual shoots and growth units. A more in-depth analysis revealed a difference in growth between 1997 growth units towards the bottom of the tube and those of 1998 towards the top. Generally speaking the specific microclimate inside the tube shelter could modulate the growth expression of the Pinus brutia Ten. Pinus brutia tube shelter growth polycyclism environmental effect Résumé - Influence du tube de protection sur la croissance de jeunes individus de pin de Brutie Pinus brutia Ten. Pinaceae . De jeunes individus de pins de Brutie Pinus brutia Ten. ont été plantés dans la region de Montpellier en alternance avec et sans tube de protection. La repercussion de ce tube a été déterminée via l etude de la croissance de l axe principal polycyclique plusieurs vagues d allongement séparées par une phase de repos . Ainsi l analyse a été effectuée en comparant quantitativement les pousses annuelles successives et les unités de croissance d individus de même âge. Les arbres situés dans les tubes de protection