Choosing the right species for biomass is about balancing two key factors - fast early growth and high wood density i.e. greater biomass per unit volume.
Fastgrowing willow (Salix spp) is considered the most appropriate Short Rotation Coppice (SRC) choice but there is a wider range of potentially useful Short Rotation Forestry (SRF) species, both native and exotic, that combine fast growth and high density.
|Species||Air-dried density (kg/m3 @ 12% MC)||Calorific value (GJ/m3)||GYC||Rotation (years)||Yield over 50 years (Dry T/ha)|
To maximise site productivity as early as possible, all intensive trial SRF species will be planted at 2 x 1 metres (5,000 trees/ha), with the option to thin later if this will improve the yield.
The optimum rotation length will depend upon species' growth rates and
will be a balance between maximising yield and the economics of utilisation, however, it is expected to be somewhere between 10 - 20 years in Scotland.
Interim guidance on the grant aiding and planting of Eucalyptus in Scotland
This interim guidance briefly examines the various issues around Eucalyptus in a Scottish context and provides recommendations for its use: Interim Eucalyptus Guidance (PDF 1.2Mb)