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Báo cáo lâm nghiệp: "Growth response to thinning in Quercus pyrenaica Willd. coppice stands in Spanish central mountain"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Growth response to thinning in Quercus pyrenaica Willd. coppice stands in Spanish central mountain. | Ann. For. Sci. 61 2004 243-250 INRA EDP Sciences 2004 DOI 10.1051 forest 2004017 243 Original article Growth response to thinning in Quercus pyrenaica Willd. coppice stands in Spanish central mountain Isabel Canellas Miren Del RÍO Sonia Roig Gregorio Montero Centre for Forest Research - INIA Ctra. A Coruna km 7 5 Madrid 28040 Spain Received 10 March 2003 accepted 17 June 2003 Abstract - This paper presents the growth response of coppice forest of Quercus pyrenaica Willd. to thinnings of different intensities. Four treatments were tested light moderate and heavy thinning with respectively 25 35 and 50 of basal area removed and no thinning control . The results obtained show significant differences between treatments for diameter and biomass of the mean tree and for current diameter increment for the three inventories carried out 1994 1998 2002 . The largest values for the mean tree were observed with the heaviest thinning treatment. No differences were found between treatments for stand yield total basal area and biomass . Stand structure appears more regular in thinned plots reducing the risk of forest fires and increasing the landscape and recreation values and the possibility of silvopastoral use. growth Mediterranean oak stand structure thinning coppice Résumé - Croissance de taillis de chêne tauzin Quercus pyrenaica Willd. soumis à differentes intensités d eclaircie dans la chaĩne montagneuse centrale de l Espagne. Cet article présente la réponse de taillis de chêne tauzins Quercuspyrenaica Willd. à des éclaircies par le bas de différentes intensités. Au total quatre traitements ont été appliqués éclaircie faible moyenne et forte en enlevant respectivement 25 35 et 50 de la surface terrière et un traitement sans éclaircie contrôle . Les résultats ont mis en évidence des écarts significatifs en ce qui concerne le diamètre et la biomasse de l arbre moyen et l accroissement courant du diamètre aux trois dates d inventaires pratiqués 1994 1998 2002 à chacun de ces