TAILIEUCHUNG - Báo cáo lâm nghiệp: "Reproduction of postfire Pinus halepensis Mill. stands six years after silvicultural treatments"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Reproduction of postfire Pinus halepensis Mill. stands six years after silvicultural treatments. | Ann. For. Sci. 64 2007 59-66 INRA EDP Sciences 2007 DOI forest 2006088 59 Original article Reproduction of postfire Pinus halepensis Mill. stands six years after silvicultural treatments Jorge De Las HERASa Daniel MOYAa Francisco LÓPEZ-SERRANOa Sonia Condesb a Escuela Técnica Superior de Ingenieros Agrónomos de Albacete Universidad de Castilla-La Mancha Campus Universitario s n 02071 Albacete Spain b Escuela Técnica Superior de Ingenieros de Montes Universidad Politécnica de Madrid Ciudad Universitaria s n 28040 Madrid Spain Received 23 January 2006 accepted 27 March 2006 Abstract - In Spain wildfires have increased during the last decades with Pinus halepensis forests being the most affected. Cone differentiation and the early flowering of this species in comparison to other native Spanish species are traits considered as adaptations to postfire regeneration. The high recurrence of fires promotes a high increase in young and immature pine stands with low capability of regeneration. In this study silvicultural treatments such as thinning and pruning were carried out 5 years after fire in eleven years old P halepensis stands located in dry and semi-arid sites in SE Spain. The formation of male and female strobili production of serotinous grey mature brown and new green cones were recorded six years after treatments. Seed production and germination percentage were also tested. Results showed acceleration in cone and viable seed production in thinned plots with some differences between sites being recorded. Serotinous cone production also increased as a result of this treatment. Pinus halepensis thinning pruning postfire reproduction Résumé - Reproduction de pinèdes de Pinus halepensis Mill. six ans après incendies et traitements sylvicoles. Les incendies forestiers sont en train d augmenter ces dernières décennies en Espagne et les forêts de Pinus halepensis sont les plus atteintes. Le fait qu elles portent plusieurs types de cônes et la floraison précoce de

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