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Registro Completo |
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
22/03/2002 |
Data da última atualização: |
28/06/2021 |
Autoria: |
FREITAS, A. R. de; VIEIRA, A. F.; FERREIRA FILHO, P. |
Título: |
Estrutura de covariâncias em dados de medidas repetidas: uma aplicação a dados de pesagens de zebuínos. |
Ano de publicação: |
2001 |
Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 38., 2001, Piracicaba, SP. Anais... Piracicaba: SBZ, 2001. p. 637-638. |
Idioma: |
Português |
Thesaurus Nal: |
Beef cattle. |
Categoria do assunto: |
G Melhoramento Genético |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPPSE/13816/1/PROCIARF2001.00083.PDF
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Marc: |
LEADER 00546nam a2200133 a 4500 001 1045974 005 2021-06-28 008 2001 bl uuuu u00u1 u #d 100 1 $aFREITAS, A. R. de 245 $aEstrutura de covariâncias em dados de medidas repetidas$buma aplicação a dados de pesagens de zebuínos.$h[electronic resource] 260 $aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 38., 2001, Piracicaba, SP. Anais... Piracicaba: SBZ, 2001. p. 637-638.$c2001 650 $aBeef cattle 700 1 $aVIEIRA, A. F. 700 1 $aFERREIRA FILHO, P.
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Embrapa Pecuária Sudeste (CPPSE) |
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Registro Completo
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
05/09/2017 |
Data da última atualização: |
27/02/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
C - 0 |
Autoria: |
SOUZA, L. S. B. de; MOURA, M. S. B. de; SEDIYAMA, G. C.; SILVA, T. G. F. da. |
Afiliação: |
LUCIANA SANDRA BASTOS DE SOUZA, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada, PE; MAGNA SOELMA BESERRA DE MOURA, CPATSA; GILBERTO CHOHAKU SEDIYAMA, UFV; THIERES GEORGE FREIRE DA SILVA, Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada, PE. |
Título: |
Carbon exchange in a Caatinga area during an unusually drought year. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Agrometeoros, Passo Fundo, v. 25, n. 1, p. 37-45, ago. 2017. |
Idioma: |
Inglês |
Conteúdo: |
The objective of this study was to analyze the daily and seasonal variation of the carbon balance components in a caatinga area during an unusually drought year. Data were collected from a turbulent vortices covariance system installed at an area in Caatinga, in the region of Petrolina Municipality, State of Pernambuco, Brazil. Carbon dioxide flux data were collected in the year 2012, and the partitioning between gross primary productivity (GPP) and ecosystem respiration (Re). The vegetation cover index, weather elements and the soil water content were monitored. It was observed that the daily emissions of CO2 flux was dependent upon photosynthetically active radiation in the first days after rainfall events, being influenced by the water vapor pressure deficit with the reduction in the soil water content. The occurrence of up to 2 mm rainfall promoted peaks of Re after long periods of drought. The measured NEP was equal to 468.18 gC m-2 year-1. So, it is concluded that in years with severe drought, Caatinga may act as a source of carbon to the atmosphere. |
Palavras-Chave: |
Dry forest; Semiárido; Turbulent vortices covariance. |
Thesagro: |
Dióxido de carbono; Floresta; Resistência a Seca; Seca. |
Thesaurus NAL: |
Carbon dioxide. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163425/1/Magna-1.pdf
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Marc: |
LEADER 01803naa a2200253 a 4500 001 2075024 005 2018-02-27 008 2017 bl uuuu u00u1 u #d 100 1 $aSOUZA, L. S. B. de 245 $aCarbon exchange in a Caatinga area during an unusually drought year.$h[electronic resource] 260 $c2017 520 $aThe objective of this study was to analyze the daily and seasonal variation of the carbon balance components in a caatinga area during an unusually drought year. Data were collected from a turbulent vortices covariance system installed at an area in Caatinga, in the region of Petrolina Municipality, State of Pernambuco, Brazil. Carbon dioxide flux data were collected in the year 2012, and the partitioning between gross primary productivity (GPP) and ecosystem respiration (Re). The vegetation cover index, weather elements and the soil water content were monitored. It was observed that the daily emissions of CO2 flux was dependent upon photosynthetically active radiation in the first days after rainfall events, being influenced by the water vapor pressure deficit with the reduction in the soil water content. The occurrence of up to 2 mm rainfall promoted peaks of Re after long periods of drought. The measured NEP was equal to 468.18 gC m-2 year-1. So, it is concluded that in years with severe drought, Caatinga may act as a source of carbon to the atmosphere. 650 $aCarbon dioxide 650 $aDióxido de carbono 650 $aFloresta 650 $aResistência a Seca 650 $aSeca 653 $aDry forest 653 $aSemiárido 653 $aTurbulent vortices covariance 700 1 $aMOURA, M. S. B. de 700 1 $aSEDIYAMA, G. C. 700 1 $aSILVA, T. G. F. da 773 $tAgrometeoros, Passo Fundo$gv. 25, n. 1, p. 37-45, ago. 2017.
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Embrapa Semiárido (CPATSA) |
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