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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
05/01/2023 |
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Data da última atualização: |
05/01/2023 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
LIMA, M. A. de; LUIZ, A. J. B.; GALVAO, J. A. H.; CABRAL, O. M. R. |
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Afiliação: |
MAGDA APARECIDA DE LIMA, CNPMA; ALFREDO JOSE BARRETO LUIZ, CNPMA; JOSE ABRAHAO HADDAD GALVAO, CNPMA; OSVALDO MACHADO RODRIGUES CABRAL, CNPMA. |
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Título: |
Preliminary measurements on diel CH4 and N2O fluxes on Brachiaria pasture. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
In: INTERNATIONAL GREENHOUSE GAS & ANIMAL AGRICULTURE CONFERENCE, 8., Orlando, Florida. Abstract Book... Orlando, Florida: GGAA, 2022. |
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Páginas: |
p. 139. |
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Idioma: |
Português |
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Conteúdo: |
Brazil has extensive pasture areas for beef cattle grazing. An experiment was carried out in summer in a Brachiaria pasture in Southeastern Brazil, characterized by hot and humid climate in summer and dry in winter, with the objective of measuring hourly fluxes of methane and nitrous oxide from soil and identifying a possible relationship with environmental parameters, including air temperature, soil temperature, solar radiation, photosynthetically active radiation (PAR), and soil moisture. Temperature and radiation data were obtained from a climatological station on February 13 and 14, 2020, starting at 9:00 am and ending at the same hour of the next day. Soil moisture data were recorded by humidity sensors. The gas collection method used was the static closed chamber. Five chambers were used at the same time. Methane and nitrous oxide concentrations were sampled every 2 hours, in intervals of 0, 10, 20, 30, and 40 minutes. The gas samples were extracted by BD 60 mL syringes with a three-way luer lock valve and then transferred to 12 mL vacuum vials of the Labco Exetainer brand. A Thermo Scientific chromatograph model, Trace 1310, was used to determine the concentrations of gases. The statistical analysis was performed using the PROC CORR procedure of the SAS program. Preliminary results showed that N2O fluxes peaked at 3 p.m. with around 10 ?g N-N2O m-2 h-1 and a minimum value of -2 ?g N-N2O m-2 h-1 at 1 a.m. N2O fluxes were positively correlated with air temperature (0.70939 /0.0066) and with PAR (0.59037/0.0337), while they were negatively correlated with relative humidity (-.69266/0.0087). Methane correlated negatively with soil temperature (-0.88646/<0.001), although the concentrations were very low throughout the day. Other diel measurements are going to be carried out and the experiment will be repeated in the summer season. MenosBrazil has extensive pasture areas for beef cattle grazing. An experiment was carried out in summer in a Brachiaria pasture in Southeastern Brazil, characterized by hot and humid climate in summer and dry in winter, with the objective of measuring hourly fluxes of methane and nitrous oxide from soil and identifying a possible relationship with environmental parameters, including air temperature, soil temperature, solar radiation, photosynthetically active radiation (PAR), and soil moisture. Temperature and radiation data were obtained from a climatological station on February 13 and 14, 2020, starting at 9:00 am and ending at the same hour of the next day. Soil moisture data were recorded by humidity sensors. The gas collection method used was the static closed chamber. Five chambers were used at the same time. Methane and nitrous oxide concentrations were sampled every 2 hours, in intervals of 0, 10, 20, 30, and 40 minutes. The gas samples were extracted by BD 60 mL syringes with a three-way luer lock valve and then transferred to 12 mL vacuum vials of the Labco Exetainer brand. A Thermo Scientific chromatograph model, Trace 1310, was used to determine the concentrations of gases. The statistical analysis was performed using the PROC CORR procedure of the SAS program. Preliminary results showed that N2O fluxes peaked at 3 p.m. with around 10 ?g N-N2O m-2 h-1 and a minimum value of -2 ?g N-N2O m-2 h-1 at 1 a.m. N2O fluxes were positively correlated with air temperature (0.70... Mostrar Tudo |
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Thesagro: |
Brachiaria. |
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Thesaurus Nal: |
Measurement; Pastures. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1150656/1/RA-LimaMA-et-al-GGAA-2022-p139.pdf
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Marc: |
LEADER 02501nam a2200193 a 4500
001 2150656
005 2023-01-05
008 2022 bl uuuu u00u1 u #d
100 1 $aLIMA, M. A. de
245 $aPreliminary measurements on diel CH4 and N2O fluxes on Brachiaria pasture.$h[electronic resource]
260 $aIn: INTERNATIONAL GREENHOUSE GAS & ANIMAL AGRICULTURE CONFERENCE, 8., Orlando, Florida. Abstract Book... Orlando, Florida: GGAA$c2022
300 $ap. 139.
520 $aBrazil has extensive pasture areas for beef cattle grazing. An experiment was carried out in summer in a Brachiaria pasture in Southeastern Brazil, characterized by hot and humid climate in summer and dry in winter, with the objective of measuring hourly fluxes of methane and nitrous oxide from soil and identifying a possible relationship with environmental parameters, including air temperature, soil temperature, solar radiation, photosynthetically active radiation (PAR), and soil moisture. Temperature and radiation data were obtained from a climatological station on February 13 and 14, 2020, starting at 9:00 am and ending at the same hour of the next day. Soil moisture data were recorded by humidity sensors. The gas collection method used was the static closed chamber. Five chambers were used at the same time. Methane and nitrous oxide concentrations were sampled every 2 hours, in intervals of 0, 10, 20, 30, and 40 minutes. The gas samples were extracted by BD 60 mL syringes with a three-way luer lock valve and then transferred to 12 mL vacuum vials of the Labco Exetainer brand. A Thermo Scientific chromatograph model, Trace 1310, was used to determine the concentrations of gases. The statistical analysis was performed using the PROC CORR procedure of the SAS program. Preliminary results showed that N2O fluxes peaked at 3 p.m. with around 10 ?g N-N2O m-2 h-1 and a minimum value of -2 ?g N-N2O m-2 h-1 at 1 a.m. N2O fluxes were positively correlated with air temperature (0.70939 /0.0066) and with PAR (0.59037/0.0337), while they were negatively correlated with relative humidity (-.69266/0.0087). Methane correlated negatively with soil temperature (-0.88646/<0.001), although the concentrations were very low throughout the day. Other diel measurements are going to be carried out and the experiment will be repeated in the summer season.
650 $aMeasurement
650 $aPastures
650 $aBrachiaria
700 1 $aLUIZ, A. J. B.
700 1 $aGALVAO, J. A. H.
700 1 $aCABRAL, O. M. R.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Semiárido. |
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Data corrente: |
02/04/2007 |
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Data da última atualização: |
05/04/2022 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
CAVALCANTI, J. S. B.; MOTA, D. M. da; SILVA, P. C. G. da. |
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Afiliação: |
JOSEFA SALETE BARBOSA CAVALCANTI, UFPE; DALVA MARIA DA MOTA, CPATU; PEDRO CARLOS GAMA DA SILVA, CPATSA. |
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Título: |
Transformações recentes nos espaços de fruticultura do Nordeste do Brasil. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
In: ELIAS, D.; PEQUENO, R. (Org.). Difusão do agronegócio e novas dinâmicas socioespaciais. Fortaleza: Banco do Nordeste do Brasil, 2006. |
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Páginas: |
p. 117-149. |
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ISBN: |
85-87062-80-2 |
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Idioma: |
Português |
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Conteúdo: |
Constituição e mudanças nas regiões produtoras de frutas frescas; As novas condições dos mercados: qualidade, competitividade e estratégias empresariais; Classe, etnicidade e gênero nos novos contextos produtivos regionais; Frutas para o mercado global: uva, coco e manga; Uva: cultura e espaço de mulheres; Coco: produto da moda; Manga: campeã de exportação; Resistência local e constituição dos novos atores; As relações global/local; A atualização das desigualdades de gênero; Formas de organização; A externalização da produção e a reestruturação dos setores. |
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Palavras-Chave: |
Cultivo da uva; Espaço para mulher; Fruta fresca; Mercado de consumo; Política pública; Processo social. |
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Thesagro: |
Emprego; Fruticultura; Mercado de Trabalho; Mulher Rural; Papel da mulher; Produção; Trabalho Temporário. |
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Thesaurus NAL: |
Agricultural income; Employment; Rural development; Rural women; Women in agriculture. |
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Categoria do assunto: |
--
B Sociologia Rural |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/96182/1/Artigo-Transformacao.pdf
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Marc: |
LEADER 01760naa a2200385 a 4500
001 1157706
005 2022-04-05
008 2006 bl uuuu u00u1 u #d
020 $a85-87062-80-2
100 1 $aCAVALCANTI, J. S. B.
245 $aTransformações recentes nos espaços de fruticultura do Nordeste do Brasil.$h[electronic resource]
260 $c2006
300 $ap. 117-149.
520 $aConstituição e mudanças nas regiões produtoras de frutas frescas; As novas condições dos mercados: qualidade, competitividade e estratégias empresariais; Classe, etnicidade e gênero nos novos contextos produtivos regionais; Frutas para o mercado global: uva, coco e manga; Uva: cultura e espaço de mulheres; Coco: produto da moda; Manga: campeã de exportação; Resistência local e constituição dos novos atores; As relações global/local; A atualização das desigualdades de gênero; Formas de organização; A externalização da produção e a reestruturação dos setores.
650 $aAgricultural income
650 $aEmployment
650 $aRural development
650 $aRural women
650 $aWomen in agriculture
650 $aEmprego
650 $aFruticultura
650 $aMercado de Trabalho
650 $aMulher Rural
650 $aPapel da mulher
650 $aProdução
650 $aTrabalho Temporário
653 $aCultivo da uva
653 $aEspaço para mulher
653 $aFruta fresca
653 $aMercado de consumo
653 $aPolítica pública
653 $aProcesso social
700 1 $aMOTA, D. M. da
700 1 $aSILVA, P. C. G. da
773 $tIn: ELIAS, D.; PEQUENO, R. (Org.). Difusão do agronegócio e novas dinâmicas socioespaciais. Fortaleza: Banco do Nordeste do Brasil, 2006.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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