Effect of short rotation coppice plantation on the performance and chips quality of a self-propelled harvester
Civitarese, V.; Faugno, S.; Pindozzi, S.; Assirelli, A.; Pari, L.
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The performance of coppice harvesting machines is influenced by parameters such as field
yield, the shape and size of the plantation and the space for turning at the headland. The
quality of chips and the effect of the dendrometric characteristic of nine different species
(Fraxinus angustifolia, Robinia pseudoacacia, Salix alba, Eucalyptus occidentalis, Populus nigra L.
and four genotypes of Populus x euroamericana (Grimminge, Hoogvorst, Muur, Vesten) grown
in the same flat plot of about 4.5 ha on the performance rate and quality of the work, was
evaluated. Field yields ranged from 33 t ha1 to ~95 t ha1, for the S. alba and E. occidentalis,
respectively. The harvester worked with an average speed of 0.91m s1 (±0.22) and average
productivities of 0.98 ha h1 (±0.24) and 45.25 t h1 (±5.56). There was a satisfactory linear
correlation between the working speed of the machine and field yield. The quality of the
chips showed some variability with values of moisture content ranging between 42.7% and
57.3% (for R. pseudoacacia and S. Alba respectively) and values of bulk density from
273 kg m3 to 313 kg m3 (for Populus euroamericana Vesten and E. occidentalis respectively).