Productivity and costs of two low-investment biomass harvesting systems applied in a situation of mixed forest of semi-natural regeneration

SUMMARY: This study identifies the most influential variables in harvesting operations and compares the productivity and costs of two low-investment biomass harvesting system for young trees, likely to be used by owners of small and medium-sized forests in south-central Chile. The focus is harvestin...

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Autores principales:	Carey,Patricio, Labbé,Rodrigo, Trincado,Guillermo, Thiers,Oscar, Gárate,Daniel
Lenguaje:	English
Publicado:	Universidad Austral de Chile, Facultad de Ciencias Forestales 2018
Materias:	Acacia melanoxylon Eucalyptus globulus forest biomass young trees small and medium-sized forests
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002018000300419
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spelling	oai:scielo:S0717-920020180003004192019-10-24Productivity and costs of two low-investment biomass harvesting systems applied in a situation of mixed forest of semi-natural regenerationCarey,PatricioLabbé,RodrigoTrincado,GuillermoThiers,OscarGárate,Daniel Acacia melanoxylon Eucalyptus globulus forest biomass young trees small and medium-sized forests SUMMARY: This study identifies the most influential variables in harvesting operations and compares the productivity and costs of two low-investment biomass harvesting system for young trees, likely to be used by owners of small and medium-sized forests in south-central Chile. The focus is harvesting the natural regeneration of Acacia melanoxylon, characterized by a high density, around 6,900 trees ha-1, with an average diameter at breast height (DBH) of 5.5 centimeters, under the cover of a Eucalyptus globulus plantation established in 2004 in Valdivia, Los Ríos region, Chile. Whole-tree harvesting was used and included felling and skidding activities. In the motor-manual system, felling was carried out with chainsaws and skidding with oxen. In the semi-mechanized system, two chainsaws equipped with a felling frame and a farm tractor with grapple for skidding were used. Time studies were done, productivity models were developed and harvesting costs were calculated. The cost of both harvesting systems was relatively similar, for an 80-meter average skidding distance, with an average cost of 24.7 USD Mgw -1 (wet weight) in the motor-manual system and 24.0 USD Mgw -1 in the semi-mechanized system. Understory density and terrain slope had a highly significant impact on productivity and felling costs. For skidding, the hauling distance and skidding capacity significantly affected productivity and costs, while terrain slope, with ranges between 0 and 20 %, had no significant effects on productivity.info:eu-repo/semantics/openAccessUniversidad Austral de Chile, Facultad de Ciencias ForestalesBosque (Valdivia) v.39 n.3 20182018-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002018000300419en10.4067/S0717-92002018000300419
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Acacia melanoxylon Eucalyptus globulus forest biomass young trees small and medium-sized forests
spellingShingle	Acacia melanoxylon Eucalyptus globulus forest biomass young trees small and medium-sized forests Carey,Patricio Labbé,Rodrigo Trincado,Guillermo Thiers,Oscar Gárate,Daniel Productivity and costs of two low-investment biomass harvesting systems applied in a situation of mixed forest of semi-natural regeneration
description	SUMMARY: This study identifies the most influential variables in harvesting operations and compares the productivity and costs of two low-investment biomass harvesting system for young trees, likely to be used by owners of small and medium-sized forests in south-central Chile. The focus is harvesting the natural regeneration of Acacia melanoxylon, characterized by a high density, around 6,900 trees ha-1, with an average diameter at breast height (DBH) of 5.5 centimeters, under the cover of a Eucalyptus globulus plantation established in 2004 in Valdivia, Los Ríos region, Chile. Whole-tree harvesting was used and included felling and skidding activities. In the motor-manual system, felling was carried out with chainsaws and skidding with oxen. In the semi-mechanized system, two chainsaws equipped with a felling frame and a farm tractor with grapple for skidding were used. Time studies were done, productivity models were developed and harvesting costs were calculated. The cost of both harvesting systems was relatively similar, for an 80-meter average skidding distance, with an average cost of 24.7 USD Mgw -1 (wet weight) in the motor-manual system and 24.0 USD Mgw -1 in the semi-mechanized system. Understory density and terrain slope had a highly significant impact on productivity and felling costs. For skidding, the hauling distance and skidding capacity significantly affected productivity and costs, while terrain slope, with ranges between 0 and 20 %, had no significant effects on productivity.
author	Carey,Patricio Labbé,Rodrigo Trincado,Guillermo Thiers,Oscar Gárate,Daniel
author_facet	Carey,Patricio Labbé,Rodrigo Trincado,Guillermo Thiers,Oscar Gárate,Daniel
author_sort	Carey,Patricio
title	Productivity and costs of two low-investment biomass harvesting systems applied in a situation of mixed forest of semi-natural regeneration
title_short	Productivity and costs of two low-investment biomass harvesting systems applied in a situation of mixed forest of semi-natural regeneration
title_full	Productivity and costs of two low-investment biomass harvesting systems applied in a situation of mixed forest of semi-natural regeneration
title_fullStr	Productivity and costs of two low-investment biomass harvesting systems applied in a situation of mixed forest of semi-natural regeneration
title_full_unstemmed	Productivity and costs of two low-investment biomass harvesting systems applied in a situation of mixed forest of semi-natural regeneration
title_sort	productivity and costs of two low-investment biomass harvesting systems applied in a situation of mixed forest of semi-natural regeneration
publisher	Universidad Austral de Chile, Facultad de Ciencias Forestales
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-92002018000300419
work_keys_str_mv	AT careypatricio productivityandcostsoftwolowinvestmentbiomassharvestingsystemsappliedinasituationofmixedforestofseminaturalregeneration AT labberodrigo productivityandcostsoftwolowinvestmentbiomassharvestingsystemsappliedinasituationofmixedforestofseminaturalregeneration AT trincadoguillermo productivityandcostsoftwolowinvestmentbiomassharvestingsystemsappliedinasituationofmixedforestofseminaturalregeneration AT thiersoscar productivityandcostsoftwolowinvestmentbiomassharvestingsystemsappliedinasituationofmixedforestofseminaturalregeneration AT garatedaniel productivityandcostsoftwolowinvestmentbiomassharvestingsystemsappliedinasituationofmixedforestofseminaturalregeneration
_version_	1718444244698398720

Productivity and costs of two low-investment biomass harvesting systems applied in a situation of mixed forest of semi-natural regeneration

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