tailieunhanh - Báo cáo lâm nghiệp: "Variability of cutting regimes in small private woodlots of south-western France"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Variability of cutting regimes in small private woodlots of south-western France. | Ann. For. Sci. 63 2006 915-927 INRA EDP Sciences 2006 DOI forest 2006075 915 Original article Variability of cutting regimes in small private woodlots of south-western France Gaetan Du Bus DE Warnaffe Marc Deconchat Sylvie Ladet Gérard Balent UMR 1201 Dynafor INRA INPT-ENSAT Chemin de Borde Rouge BP 52627 31326 Castanet-Tolosan France Received 19 September 2005 accepted 14 June 2006 Abstract - The small scale forest holdings are very common in Europe but their management is not well known. The classical principes of forest management and of silviculture being rarely applied their management is often seen as purely opportunistic and even chaotic. To overcome this first sight a detailed analysis of management practices in six private woodlots from two municipalities in south western France was done with semi-directive interviews of the owners and an dynamic analysis of a chronological series of aerial pictures. The said practices from the interviews and the seen practices from the aerial pictures were crossed in a GIS and allowed to build the chronology of logging operations in any points of the woodlots from 1938 to 2003. The data from interviews and from aerial pictures fit together provided useful complementary information. They showed that there were no permanent spatial management unit the logged areas being defined according to the local and current conditions. The silvicultural strategies and their dynamic have been described. The spatial-temporal complexity of the social and technical factors of the logging decision was acknowledged as a key explanation of the discrepancy between these small scale silvicultural systems and the classical systems. coppice fragmented forest forestry practices logging dynamic Résumé - Variabilité des regimes de coupes dans des taillis de petites forêts fragmentees du sud-ouest de la France. La petite propriété forestière est très commune en Europe mais sa gestion est mal connue. Les grands principes d aménagement et de .