Trabalho Apresentado em Evento

Burning of Amazonian forest in Ariquemes, Rondonia, Brazil: Biomass, charcoal formation and burning efficiency

Biomass burning in tropical forests - the normal practice to prepare land for agriculture and ranching - has been a major source of CO2 emitted to the atmosphere. Mass transformations by burning are still little studied in the tropics. The present study estimated parameters, such as the stock of car...

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Autor principal: Graça, Paulo Maurício Lima Alencastro de
Outros Autores: Fearnside, Philip Martin, Cerri, Carlos C.
Grau: Trabalho Apresentado em Evento
Idioma: English
Publicado em: Forest Ecology and Management 2020
Assuntos:
Biomass
Slash And Burn
Tropical Forest
Brasil
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/19972
id oai:repositorio:1-19972
recordtype dspace
spelling oai:repositorio:1-19972 Burning of Amazonian forest in Ariquemes, Rondonia, Brazil: Biomass, charcoal formation and burning efficiency Graça, Paulo Maurício Lima Alencastro de Fearnside, Philip Martin Cerri, Carlos C. Biomass Slash And Burn Tropical Forest Brasil Biomass burning in tropical forests - the normal practice to prepare land for agriculture and ranching - has been a major source of CO2 emitted to the atmosphere. Mass transformations by burning are still little studied in the tropics. The present study estimated parameters, such as the stock of carbon contained in the biomass, burning efficiency and the formation of charcoal and ashes in a tropical moist forest. Two sets of plots arranged in the form of 'stars' (720 m2 total) were installed in a 3.5 ha area of forest that had been felled for planting pasture at Fazenda Nova Vida, Ariquemes, Rondonia. Each 'star' had six rays measuring 2 m x 30 m; alternating rays were designated for pre-bum and post-bum measurements. All above-ground biomass present in the plots was weighed directly before the bum in the pre-bum rays and after the bum in the post-bum rays. Pieces of wood with diameter ≥ 10 cm also had their biomasses estimated from volume estimates, using line-intersect sampling (LIS) in order to increase the area of sampling and to allow volume loss to be estimated as an increment based on individual pieces measured before, and after, the bum at the same point (as opposed to inferring change as a difference between independent estimates of stocks). The initial above-ground biomass (dry weight) before the bum was estimated at 306.5 ± 48.6 (mean ± SE) Mg ha-1, with an additional 4.5 Mg ha-1 for trees left standing. Carbon stock in the initial biomass (including trees left standing) was 141.3 (Mg C) h-1. After burning, carbon stock was reduced by 36.8% (burning efficiency). The stocks of charcoal and ash formed in the bum were, respectively, 6.4 ± 2.7 and 5.7 ± 1.0 Mg ha-1. The destructive and nondestructive (LIS) methods did not differ significantly (t-test, p > 0.05) in estimating post-burn stocks of wood and charcoal. The results of this study contribute to improving the estimates of parameters needed for global carbon calculations and point to ways in which estimates of these parameters could be further improved. 2020-06-16T17:29:08Z 2020-06-16T17:29:08Z 1999 Trabalho Apresentado em Evento https://repositorio.inpa.gov.br/handle/1/19972 10.1016/S0378-1127(98)00547-7 en Volume 120, Número 1-3, Pags. 179-191 Restrito Forest Ecology and Management
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Biomass
Slash And Burn
Tropical Forest
Brasil
spellingShingle Biomass
Slash And Burn
Tropical Forest
Brasil
Graça, Paulo Maurício Lima Alencastro de
Burning of Amazonian forest in Ariquemes, Rondonia, Brazil: Biomass, charcoal formation and burning efficiency
topic_facet Biomass
Slash And Burn
Tropical Forest
Brasil
description Biomass burning in tropical forests - the normal practice to prepare land for agriculture and ranching - has been a major source of CO2 emitted to the atmosphere. Mass transformations by burning are still little studied in the tropics. The present study estimated parameters, such as the stock of carbon contained in the biomass, burning efficiency and the formation of charcoal and ashes in a tropical moist forest. Two sets of plots arranged in the form of 'stars' (720 m2 total) were installed in a 3.5 ha area of forest that had been felled for planting pasture at Fazenda Nova Vida, Ariquemes, Rondonia. Each 'star' had six rays measuring 2 m x 30 m; alternating rays were designated for pre-bum and post-bum measurements. All above-ground biomass present in the plots was weighed directly before the bum in the pre-bum rays and after the bum in the post-bum rays. Pieces of wood with diameter ≥ 10 cm also had their biomasses estimated from volume estimates, using line-intersect sampling (LIS) in order to increase the area of sampling and to allow volume loss to be estimated as an increment based on individual pieces measured before, and after, the bum at the same point (as opposed to inferring change as a difference between independent estimates of stocks). The initial above-ground biomass (dry weight) before the bum was estimated at 306.5 ± 48.6 (mean ± SE) Mg ha-1, with an additional 4.5 Mg ha-1 for trees left standing. Carbon stock in the initial biomass (including trees left standing) was 141.3 (Mg C) h-1. After burning, carbon stock was reduced by 36.8% (burning efficiency). The stocks of charcoal and ash formed in the bum were, respectively, 6.4 ± 2.7 and 5.7 ± 1.0 Mg ha-1. The destructive and nondestructive (LIS) methods did not differ significantly (t-test, p > 0.05) in estimating post-burn stocks of wood and charcoal. The results of this study contribute to improving the estimates of parameters needed for global carbon calculations and point to ways in which estimates of these parameters could be further improved.
format Trabalho Apresentado em Evento
author Graça, Paulo Maurício Lima Alencastro de
author2 Fearnside, Philip Martin
Cerri, Carlos C.
author2Str Fearnside, Philip Martin
Cerri, Carlos C.
title Burning of Amazonian forest in Ariquemes, Rondonia, Brazil: Biomass, charcoal formation and burning efficiency
title_short Burning of Amazonian forest in Ariquemes, Rondonia, Brazil: Biomass, charcoal formation and burning efficiency
title_full Burning of Amazonian forest in Ariquemes, Rondonia, Brazil: Biomass, charcoal formation and burning efficiency
title_fullStr Burning of Amazonian forest in Ariquemes, Rondonia, Brazil: Biomass, charcoal formation and burning efficiency
title_full_unstemmed Burning of Amazonian forest in Ariquemes, Rondonia, Brazil: Biomass, charcoal formation and burning efficiency
title_sort burning of amazonian forest in ariquemes, rondonia, brazil: biomass, charcoal formation and burning efficiency
publisher Forest Ecology and Management
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/19972
_version_ 1787143203377381376
score 11.755432

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