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Registro Completo |
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Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
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Data corrente: |
29/04/1998 |
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Data da última atualização: |
29/04/1998 |
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Autoria: |
MACHADO, M. A.; SILVERIO, J. L.; BAPTISTA, C. R.; CRISTOFANI, M.; TEOFILO SOBRINHO, J. |
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Título: |
Avaliacao de transmissao e selecao de variedades a clorose variegada dos citros (CVC). |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Laranja, v.13, n.2, p.515-531, 1992. |
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Idioma: |
Português |
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Palavras-Chave: |
Avaliacao; Citro; Clorose variegada; CVC; Selecao de variedade; Transmissao; Transmission; Variegated chlorosis. |
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Thesaurus Nal: |
Citrus; varieties. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00744naa a2200277 a 4500
001 1354422
005 1998-04-29
008 1992 bl uuuu u00u1 u #d
100 1 $aMACHADO, M. A.
245 $aAvaliacao de transmissao e selecao de variedades a clorose variegada dos citros (CVC).
260 $c1992
650 $aCitrus
650 $avarieties
653 $aAvaliacao
653 $aCitro
653 $aClorose variegada
653 $aCVC
653 $aSelecao de variedade
653 $aTransmissao
653 $aTransmission
653 $aVariegated chlorosis
700 1 $aSILVERIO, J. L.
700 1 $aBAPTISTA, C. R.
700 1 $aCRISTOFANI, M.
700 1 $aTEOFILO SOBRINHO, J.
773 $tLaranja$gv.13, n.2, p.515-531, 1992.
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Registro original: |
Embrapa Tabuleiros Costeiros (CPATC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
03/07/2007 |
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Data da última atualização: |
14/11/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - C |
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Autoria: |
ROCHA, H. R. da; FREITAS, H. C.; ROSOLEM, R.; JUÁREZ, R. I. N.; TANNUS, R. N.; LIGO, M. A. V.; CABRAL, O. M. R.; DIAS, M. A. F. S. |
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Afiliação: |
HUMBERTO R. da ROCHA, Departamento de Ciências Atmosféricas, IAG/Universidade de São Paulo; HELBER C. FREITAS, Departamento de Ciências Atmosféricas, IAG/Universidade de São Paulo; RAFAEL ROSOLEM, Departamento de Ciências Atmosféricas, IAG/Universidade de São Paulo; Robinson I.N. Juárez ROBINSON I. N. JUÁREZ, Departamento de Ciências Atmosféricas, IAG/Universidade de São Paulo; RAFAEL N. TANNUS, Departamento de Ciências Atmosféricas, IAG/Universidade de São Paulo; MARCOS ANTONIO VIEIRA LIGO, CNPMA; OSVALDO MACHADO RODRIGUES CABRAL, CNPMA; MARIA A. F. SILVA DIAS, Departamento de Ciências Atmosféricas, IAG/Universidade de São Paulo. |
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Título: |
Measurements of CO2 exchange over a woodland savanna (Cerrado Sensu stricto) in southeast Brasil. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Biota Neotropica, Campinas, v. 2, n. 1, p. 1-11, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
The technique of eddy correlation was used to measure the net ecosystem exchange over a woodland savanna (Cerrado Sensu stricto) site (Gleba Pé de Gigante) in southeast Brazil. The data set included measurements of climatological variables and soil respiration using static soil chambers. Data were collected during the period from 10 October 2000 to 30 March 2002. Measured soil respiration showed average values of 4.8 molCO m-2s-1 year round. Its 2 seasonal differences varied from 2 to 8 molCO m-2s-1 (Q = 4.9) during the dry (April to August) and wet season, respectively, and was concurrent with soil temperature and moisture variability. The net ecosystem CO2 flux (NEE) variability is controlled by solar radiation, temperature and air humidity on diel course. Seasonally, soil moisture plays a strong role by inducing litterfall, reducing canopy photosynthetic activity and soil respiration. The net sign of NEE is negative (sink) in the wet season and early dry season, with rates around -25 kgC ha-1day-1, and values as low as 40 kgC ha- 1day-1. NEE was positive (source) during most of the dry season, and changed into negative at the onset of rainy season. At critical times of soil moisture stress during the late dry season, the ecosystem experienced photosynthesis during daytime, although the net sign is positive (emission). Concurrent with dry season, the values appeared progressively positive from 5 to as much as 50 kgC ha-1day-1. The annual NEE sum appeared to be nearly in balance, or more exactly a small sink, equal to 0.1 0.3 tC ha-1yr-1, which we regard possibly as a realistic one, giving the constraining conditions imposed to the turbulent flux calculation, and favourable hypothesis of succession stages, climatic variability and CO2 fertilization. MenosThe technique of eddy correlation was used to measure the net ecosystem exchange over a woodland savanna (Cerrado Sensu stricto) site (Gleba Pé de Gigante) in southeast Brazil. The data set included measurements of climatological variables and soil respiration using static soil chambers. Data were collected during the period from 10 October 2000 to 30 March 2002. Measured soil respiration showed average values of 4.8 molCO m-2s-1 year round. Its 2 seasonal differences varied from 2 to 8 molCO m-2s-1 (Q = 4.9) during the dry (April to August) and wet season, respectively, and was concurrent with soil temperature and moisture variability. The net ecosystem CO2 flux (NEE) variability is controlled by solar radiation, temperature and air humidity on diel course. Seasonally, soil moisture plays a strong role by inducing litterfall, reducing canopy photosynthetic activity and soil respiration. The net sign of NEE is negative (sink) in the wet season and early dry season, with rates around -25 kgC ha-1day-1, and values as low as 40 kgC ha- 1day-1. NEE was positive (source) during most of the dry season, and changed into negative at the onset of rainy season. At critical times of soil moisture stress during the late dry season, the ecosystem experienced photosynthesis during daytime, although the net sign is positive (emission). Concurrent with dry season, the values appeared progressively positive from 5 to as much as 50 kgC ha-1day-1. The annual NEE sum appeared to be nearly in ba... Mostrar Tudo |
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Palavras-Chave: |
Savana; Sequestro de carbono. |
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Thesagro: |
Cerrado; Fotossíntese; Respiração. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163805/1/Rocha-Measurements-6956.pdf
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Marc: |
LEADER 02545naa a2200265 a 4500
001 1015529
005 2018-11-14
008 2002 bl uuuu u00u1 u #d
100 1 $aROCHA, H. R. da
245 $aMeasurements of CO2 exchange over a woodland savanna (Cerrado Sensu stricto) in southeast Brasil.$h[electronic resource]
260 $c2002
520 $aThe technique of eddy correlation was used to measure the net ecosystem exchange over a woodland savanna (Cerrado Sensu stricto) site (Gleba Pé de Gigante) in southeast Brazil. The data set included measurements of climatological variables and soil respiration using static soil chambers. Data were collected during the period from 10 October 2000 to 30 March 2002. Measured soil respiration showed average values of 4.8 molCO m-2s-1 year round. Its 2 seasonal differences varied from 2 to 8 molCO m-2s-1 (Q = 4.9) during the dry (April to August) and wet season, respectively, and was concurrent with soil temperature and moisture variability. The net ecosystem CO2 flux (NEE) variability is controlled by solar radiation, temperature and air humidity on diel course. Seasonally, soil moisture plays a strong role by inducing litterfall, reducing canopy photosynthetic activity and soil respiration. The net sign of NEE is negative (sink) in the wet season and early dry season, with rates around -25 kgC ha-1day-1, and values as low as 40 kgC ha- 1day-1. NEE was positive (source) during most of the dry season, and changed into negative at the onset of rainy season. At critical times of soil moisture stress during the late dry season, the ecosystem experienced photosynthesis during daytime, although the net sign is positive (emission). Concurrent with dry season, the values appeared progressively positive from 5 to as much as 50 kgC ha-1day-1. The annual NEE sum appeared to be nearly in balance, or more exactly a small sink, equal to 0.1 0.3 tC ha-1yr-1, which we regard possibly as a realistic one, giving the constraining conditions imposed to the turbulent flux calculation, and favourable hypothesis of succession stages, climatic variability and CO2 fertilization.
650 $aCerrado
650 $aFotossíntese
650 $aRespiração
653 $aSavana
653 $aSequestro de carbono
700 1 $aFREITAS, H. C.
700 1 $aROSOLEM, R.
700 1 $aJUÁREZ, R. I. N.
700 1 $aTANNUS, R. N.
700 1 $aLIGO, M. A. V.
700 1 $aCABRAL, O. M. R.
700 1 $aDIAS, M. A. F. S.
773 $tBiota Neotropica, Campinas$gv. 2, n. 1, p. 1-11, 2002.
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