Compression Processing and Load Compression of Young Scots Pine and Birch Trees in Thinnings for Bioenergy

摘要: Abstract In many boreal countries forest biomass from dense young stands has great potential to meet growing demands for bioenergy. However, there is currently no cost-effective operational system harvesting such stands. When harvesting, it would be desirable compress trees and leave some of the foliage fine branches in stand order reduce extraction nutrients improve harvested material’s fuel properties a reduced ash content point view. The objectives were evaluate experimental systems (a boom-tip mounted unit processing bunches, small prototype forwarder compressing loads) terms their utility partially debranching fresh stored bunches Scots pine loads birch trees. Processing resulted mass losses about 10% (dbh-class 5–8 cm; not significant) 15% 12–15 with 35 50% reductions contents increases in...