TAILIEUCHUNG - Báo cáo lâm nghiệp: "Germination after heat treatments of Pinus tropicalis Morelet and Pinus caribaea Morelet var. caribaea seeds of west Cuban forest"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Germination after heat treatments of Pinus tropicalis Morelet and Pinus caribaea Morelet var. caribaea seeds of west Cuban forests. | Ann. For. Sci. 63 2006 469-475 INRA EDP Sciences 2006 DOI forest 2006027 469 Original article Germination after heat treatments of Pinus tropicalis Morelet and Pinus caribaea Morelet var. caribaea seeds of west Cuban forests Jorge De Las HERASa Marta BONlLLAb Luis Wilfredo MARTÍNEZb a Escuela Técnica Superior de Ingenieros Agrónomos de Albacete Universidad de Castilla-La Mancha Campus Universitario s n 02071 Albacete Spain b Facultad de Forestal Universidad de Pinar del Río Cuba Received 29 June 2005 accepted 13 December 2005 Abstract - Pinus tropicalis Morelet and P caribaea var. caribaea are two of the four endemic pine species in Cuba. They form mixed and pure stands in the western part of the island where fire is an important factor affecting pine distribution and forest structure. In this paper the effects of different heat treatments 90 C 110 C 150 C and 200 C applied to seeds from both species for 30 s 60 s and 300 s are studied to determine their tolerance to high temperature resulting from fires. Results show high resistance of seeds from both species to high temperatures and even a significant increase in germination percentage especially in P. tropicalis. This could promote the increase of P. tropicalis distribution in comparison to P. caribaea var. caribaea in areas with high fire recurrence in W Cuba. Pinus tropicalis P caribaea var. caribaea seed fire tropical forest Cuba Résumé - Germination après des traitements thermiques sur des graines de Pinus tropicalis Morelet et Pinus caribaea Morelet var. caribaea de la forêt cubaine occidentale. Pinus tropicalis Morelet et P caribaea var. caribaea sont deux des quatre espèces de pins endémiques de Cuba. Ils forment des peuplements purs et mixtes dans la zone occidentale de l lle dans laquelle le feu est un facteur important qui affecte la distribution et la structure des forêts. Dans ce travail on étudie les effets de différents traitements thermiques 90 C 110 C 150 C et 200 C appliqués sur des .

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