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Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Clima Temperado; Embrapa Meio Ambiente. |
Data corrente: |
06/12/2019 |
Data da última atualização: |
06/12/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
CABRAL, O. M. R.; FREITAS, H. C. de; CUADRA, S. V.; ANDRADE, C. A. de; RAMOS, N. P.; GRUTZMACHER, P.; GALDOS, M.; PACKER, A. P.; ROCHA, H. R. da; ROSSI, P. |
Afiliação: |
OSVALDO MACHADO RODRIGUES CABRAL, CNPMA; HÉLBER CUSTÓDIO DE FREITAS, FC-UNESP; SANTIAGO VIANNA CUADRA, CPACT; CRISTIANO ALBERTO DE ANDRADE, CNPMA; NILZA PATRICIA RAMOS, CNPMA; PRISCILA GRUTZMACHER; MARCELO GALDOS, University of Leeds; ANA PAULA CONTADOR PACKER, CNPMA; HUMBERTO RIBEIRO DA ROCHA, IAG-USP; PAULO ROSSI, CNPMA. |
Título: |
The sustainability of a sugarcane plantation in Brazil assessed by the eddy covariance fluxes of greenhouse gases. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Agricultural and Forest Meteorology, v. 282-283, Article 107864, 2020. |
DOI: |
https://doi.org/10.1016/j.agrformet.2019.107864 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: The sustainability of sugarcane farming for biofuel has recently become a subject of debate, because its expansion may contribute significantly to global climate change mitigation. Here we report greenhouse gases (GHG) fluxes, measured by the eddy covariance method, from a commercial scale rain-fed sugarcane plantation representative of the leading bioethanol production area in southeast Brazil. The measurements covered two harvests, during which the field received nitrogen fertilization and trash was not removed. The cumulative fluxes for nitrous oxide (N2O) (62.4 ± 1.3 and 52.3 ± 1.8 g N2OCO2 eq. m?2 for the first and second years, respectively) and methane (CH4) (12.1 ± 1.7 and 10.4 ± 2.3 g CH4CO2 eq. m?2 for the first and second years, respectively) were minor sources to the atmosphere in comparison with the net ecosystem exchange (NEE) of carbon dioxide (CO2), whose sink dominated the balances (?7643. ± 129. and -4615. ± 124. g CO2 m?2 for the first and second years, respectively). Compared to the first year, the observed NEE in the second year decreased by 40%, as it covered the first re-growth from the stubble (ratoon) and exhibited a shorter growth cycle than the first year (304 versus 390 days). The second year also included the partial decomposition of the trash remaining on the soil after the first harvest (1581 ± 301 g CO2 m?2). The net ecosystem carbon balances (NECB), obtained as the cumulative fluxes of GHGs and the stalk dry biomass removed in the harvests (4923 ± 459 and 3929 ± 352 g CO2 m?2 for the first and second years, respectively) were -2646 ± 459 and -623 ± 352 g CO2 m?2 for the first and second years, respectively. Although the yields in stalk fresh weight (SFW) were representative of the region (9.9 and 8.2 kg SFW m?2, in the first and second year respectively) other factors caused a decrease of 76% in NECB, stressing the importance of the CO2 balance (assimilation versus respiration). Nevertheless, this sugarcane agro-system was an overall carbon sink with the N2O and CH4 emitted totals being offset by the net carbon gain. MenosAbstract: The sustainability of sugarcane farming for biofuel has recently become a subject of debate, because its expansion may contribute significantly to global climate change mitigation. Here we report greenhouse gases (GHG) fluxes, measured by the eddy covariance method, from a commercial scale rain-fed sugarcane plantation representative of the leading bioethanol production area in southeast Brazil. The measurements covered two harvests, during which the field received nitrogen fertilization and trash was not removed. The cumulative fluxes for nitrous oxide (N2O) (62.4 ± 1.3 and 52.3 ± 1.8 g N2OCO2 eq. m?2 for the first and second years, respectively) and methane (CH4) (12.1 ± 1.7 and 10.4 ± 2.3 g CH4CO2 eq. m?2 for the first and second years, respectively) were minor sources to the atmosphere in comparison with the net ecosystem exchange (NEE) of carbon dioxide (CO2), whose sink dominated the balances (?7643. ± 129. and -4615. ± 124. g CO2 m?2 for the first and second years, respectively). Compared to the first year, the observed NEE in the second year decreased by 40%, as it covered the first re-growth from the stubble (ratoon) and exhibited a shorter growth cycle than the first year (304 versus 390 days). The second year also included the partial decomposition of the trash remaining on the soil after the first harvest (1581 ± 301 g CO2 m?2). The net ecosystem carbon balances (NECB), obtained as the cumulative fluxes of GHGs and the stalk dry biomass removed in the h... Mostrar Tudo |
Palavras-Chave: |
Gases do efeito estufa; Óxido nitroso; Trash decomposition. |
Thesagro: |
Biomassa; Cana de Açúcar; Dióxido de Carbono; Metano. |
Thesaurus Nal: |
Biomass; Carbon dioxide; Greenhouse gas emissions; Methane; Nitrous oxide; Sugarcane. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 03282naa a2200397 a 4500 001 2116149 005 2019-12-06 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.agrformet.2019.107864$2DOI 100 1 $aCABRAL, O. M. R. 245 $aThe sustainability of a sugarcane plantation in Brazil assessed by the eddy covariance fluxes of greenhouse gases.$h[electronic resource] 260 $c2020 520 $aAbstract: The sustainability of sugarcane farming for biofuel has recently become a subject of debate, because its expansion may contribute significantly to global climate change mitigation. Here we report greenhouse gases (GHG) fluxes, measured by the eddy covariance method, from a commercial scale rain-fed sugarcane plantation representative of the leading bioethanol production area in southeast Brazil. The measurements covered two harvests, during which the field received nitrogen fertilization and trash was not removed. The cumulative fluxes for nitrous oxide (N2O) (62.4 ± 1.3 and 52.3 ± 1.8 g N2OCO2 eq. m?2 for the first and second years, respectively) and methane (CH4) (12.1 ± 1.7 and 10.4 ± 2.3 g CH4CO2 eq. m?2 for the first and second years, respectively) were minor sources to the atmosphere in comparison with the net ecosystem exchange (NEE) of carbon dioxide (CO2), whose sink dominated the balances (?7643. ± 129. and -4615. ± 124. g CO2 m?2 for the first and second years, respectively). Compared to the first year, the observed NEE in the second year decreased by 40%, as it covered the first re-growth from the stubble (ratoon) and exhibited a shorter growth cycle than the first year (304 versus 390 days). The second year also included the partial decomposition of the trash remaining on the soil after the first harvest (1581 ± 301 g CO2 m?2). The net ecosystem carbon balances (NECB), obtained as the cumulative fluxes of GHGs and the stalk dry biomass removed in the harvests (4923 ± 459 and 3929 ± 352 g CO2 m?2 for the first and second years, respectively) were -2646 ± 459 and -623 ± 352 g CO2 m?2 for the first and second years, respectively. Although the yields in stalk fresh weight (SFW) were representative of the region (9.9 and 8.2 kg SFW m?2, in the first and second year respectively) other factors caused a decrease of 76% in NECB, stressing the importance of the CO2 balance (assimilation versus respiration). Nevertheless, this sugarcane agro-system was an overall carbon sink with the N2O and CH4 emitted totals being offset by the net carbon gain. 650 $aBiomass 650 $aCarbon dioxide 650 $aGreenhouse gas emissions 650 $aMethane 650 $aNitrous oxide 650 $aSugarcane 650 $aBiomassa 650 $aCana de Açúcar 650 $aDióxido de Carbono 650 $aMetano 653 $aGases do efeito estufa 653 $aÓxido nitroso 653 $aTrash decomposition 700 1 $aFREITAS, H. C. de 700 1 $aCUADRA, S. V. 700 1 $aANDRADE, C. A. de 700 1 $aRAMOS, N. P. 700 1 $aGRUTZMACHER, P. 700 1 $aGALDOS, M. 700 1 $aPACKER, A. P. 700 1 $aROCHA, H. R. da 700 1 $aROSSI, P. 773 $tAgricultural and Forest Meteorology$gv. 282-283, Article 107864, 2020.
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Embrapa Meio Ambiente (CNPMA) |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
Data corrente: |
04/12/2015 |
Data da última atualização: |
11/03/2016 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
MENDES, M. I. de S.; SOARES FILHO, W. dos S.; COSTA, M. A. P. de C.; SOUZA, A. da S. |
Afiliação: |
MARIA INÊS DE SOUZA MENDES, UFRB; WALTER DOS SANTOS SOARES FILHO, CNPMF; MARIA ANGÉLICA PEREIRA DE CARVALHO COSTA, UFRB; ANTONIO DA SILVA SOUZA, CNPMF. |
Título: |
Adequação da técnica de minienxertia em citros. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
In: JORNADA CIENTÍFICA EMBRAPA MANDIOCA E FRUTICULTURA, 9., 2015: Cruz das Almas, BA. Pesquisa: para quê? para quem? : resumos. Brasília, DF : Embrapa, 2015. |
Idioma: |
Português |
Conteúdo: |
A comercialização de frutos cítricos sem sementes é uma demanda crescente no mercado global. Com o advento de novas técnicas de melhoramento genético, passam a ser empreendidos esforços voltados ao desenvolvimento de variedades copa triploides. |
Palavras-Chave: |
Propagação; Triploides. |
Thesagro: |
Fruta cítrica. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/134901/1/Adequacao-da-tecnica.pdf
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Marc: |
LEADER 00889nam a2200181 a 4500 001 2030701 005 2016-03-11 008 2015 bl uuuu u00u1 u #d 100 1 $aMENDES, M. I. de S. 245 $aAdequação da técnica de minienxertia em citros.$h[electronic resource] 260 $aIn: JORNADA CIENTÍFICA EMBRAPA MANDIOCA E FRUTICULTURA, 9., 2015: Cruz das Almas, BA. Pesquisa: para quê? para quem? : resumos. Brasília, DF : Embrapa$c2015 520 $aA comercialização de frutos cítricos sem sementes é uma demanda crescente no mercado global. Com o advento de novas técnicas de melhoramento genético, passam a ser empreendidos esforços voltados ao desenvolvimento de variedades copa triploides. 650 $aFruta cítrica 653 $aPropagação 653 $aTriploides 700 1 $aSOARES FILHO, W. dos S. 700 1 $aCOSTA, M. A. P. de C. 700 1 $aSOUZA, A. da S.
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