Factors affecting productivity and cost of solid biofuel in mechanized forest ditch cleaning
2014
Lazdins, A., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Kaleja, S., Forest Sector Competence Centre, SIA, Riga (Latvia) - MNKC | Zimelis, A., Latvian State Forest Research Inst. Silava, Salaspils (Latvia)
The study represents results of productivity studies of mechanized ditch cleaning using Ponsse Fox harvester adapted to multi-tree handling H6 head in forest drainage systems managed by Joint stock company “Latvia state forests”. The aim of the study is to evaluate productivity of extraction of biomass from ditches depending on working method and to estimate factors affecting prime-cost of biofuel in mechanized harvesting. The study results demonstrate that the 2nd method (mechanized extraction of roundwood and following motor-manual cleaning of remaining vegetation) is the most efficient solution for mechanized cleaning of ditches. Benefits of the 2nd method are smaller costs of undergrowth removal and bigger output of solid biofuel. Ponsse Fox harvester demonstrated sufficient work quality and productivity in the trials; however, it would be wise to use heavier harvesters or caterpillar excavator based harvesters in ditch cleaning. Using the 2nd method, a harvester can extract about 227 ha of ditches (23,000 m3 ) annually.
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