Productivity and Energy Balance in Conversion of a Quercus Cerris L. Coppice Stand into High Forest in Central Italy

摘要: Nacrtak The work was carried out in Caprarola (Viterbo, Central Italy), an aged Quercus cerris L. coppice positioned hill zones, with 45% average slope. Harvesting conducted according to the shortwood system (SWS). Felling and processing were done by chainsaw, while bunching performed three different systems: Plot 1 mules, 2 a tractor-mounted winch, 3 poliethylene chutes. Logs then forwarded roadside landing farm tractor, equipped front rear container bins. Finally, transportation from company depot truck trailer unit. In order speed up loading, tractor loader used during this stage. On basis of time consumption, product output energy authors estimated both productivity balance obtained each system. best extraction (PSH0) achieved (winching, 0.8 td.w. h–1 worker–1), lowest one (mules, 0.5 worker–1). energetic efficiency high all plots (on average, 97.6±0.3%). No correlation between consumption observed. For 3, productivity, low suggest that chutes are most efficient method viewpoint. As site Nature Reserve known minimize damage soil seedlings, is be recommended environmental point view, provided wood can extracted downhill.