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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
04/10/2006 |
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Data da última atualização: |
10/08/2018 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
LIMA, M. A. de; VILELLA, O. V.; FRIGHETTO, R. T. S.; RACHMAN, M. A. L. |
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Afiliação: |
MAGDA APARECIDA DE LIMA, CNPMA; OMAR VIEIRA VILELLA, Pólo Regional de Desenvolvimento dos Agronegócios do Vale do Paraíba/ APTA, Pindamonhangaba, SP.; ROSA TOYOKO SHIRAISHI FRIGHETTO, CNPMA; Maria Alice Lemos RACHMAN, Pólo Regional de Desenvolvimento dos Agronegócios do Vale do Paraíba/ APTA, Pindamonhangaba, SP. |
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Título: |
Influence of continuous and intermittent water regimes on methane emissions from irrigated rice crops in southeast Brazil. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
In: INTERNATIONAL METHANE AND NITROUS OXIDE MITIGATION CONFERENCE, 3., 2003, Beijing. Proceedings... Beijing: China Coal Information Institute, 2003. p. 524-531. |
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Idioma: |
Inglês |
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Conteúdo: |
Irrigated rice crops in Brazil correspond to 35% of the total rice area and the preferred irrigation method is continuous flooding. In this study two water management systems ? continuous and intermittent flooding ? were monitored for the purpose of comparing their methane emission potential. Intermittent flooding was characterized by alternating flooding and draining periods during the rice cropping cycle. In both systems nitrogen fertilizers were applied twice (NPK and urea alone). Methane fluxes were determined using a closed chamber method (boxes 60x60 cm), and analyzed by GC-FID. Samples were collected from 4 boxes (2 boxes for each water management system) twice a week, for a weekly total of 46 samples. Measurements of air and soil temperature, soil and water pH, redox potential, plant biomass were done. After 104 days the accumulated fluxes resulted in a mean methane emission of 21.1 9 g CH4 m-2 d-1 under the continuous flooding regime and 23.9 g CH4 m-2 d-1 under the intermittent flooding regime. After the two N fertilizer application, methane fluxes decreased in all boxes, with a more marked reduction occurring in the intermittent regime stands. Total accumulated methane emissions, as well as grain yield, were evaluated for each water management system at the end of the cropping season, showing 13% higher productivity in the field under intermittent flooding system. The objectives of the present study were (i) to improve methane emission estimates and compare the emission potential of traditionally managed crop systems and (ii) to study the possibility of minimizing water consumption and the influence on the methane fluxes without deleterious effects to the crop. MenosIrrigated rice crops in Brazil correspond to 35% of the total rice area and the preferred irrigation method is continuous flooding. In this study two water management systems ? continuous and intermittent flooding ? were monitored for the purpose of comparing their methane emission potential. Intermittent flooding was characterized by alternating flooding and draining periods during the rice cropping cycle. In both systems nitrogen fertilizers were applied twice (NPK and urea alone). Methane fluxes were determined using a closed chamber method (boxes 60x60 cm), and analyzed by GC-FID. Samples were collected from 4 boxes (2 boxes for each water management system) twice a week, for a weekly total of 46 samples. Measurements of air and soil temperature, soil and water pH, redox potential, plant biomass were done. After 104 days the accumulated fluxes resulted in a mean methane emission of 21.1 9 g CH4 m-2 d-1 under the continuous flooding regime and 23.9 g CH4 m-2 d-1 under the intermittent flooding regime. After the two N fertilizer application, methane fluxes decreased in all boxes, with a more marked reduction occurring in the intermittent regime stands. Total accumulated methane emissions, as well as grain yield, were evaluated for each water management system at the end of the cropping season, showing 13% higher productivity in the field under intermittent flooding system. The objectives of the present study were (i) to improve methane emission estimates and compare the em... Mostrar Tudo |
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Thesagro: |
Arroz irrigado; Metano. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163187/1/Lima-influence.pdf
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Marc: |
LEADER 02371nam a2200169 a 4500
001 1015075
005 2018-08-10
008 2003 bl uuuu u00u1 u #d
100 1 $aLIMA, M. A. de
245 $aInfluence of continuous and intermittent water regimes on methane emissions from irrigated rice crops in southeast Brazil.$h[electronic resource]
260 $aIn: INTERNATIONAL METHANE AND NITROUS OXIDE MITIGATION CONFERENCE, 3., 2003, Beijing. Proceedings... Beijing: China Coal Information Institute, 2003. p. 524-531.$c2003
520 $aIrrigated rice crops in Brazil correspond to 35% of the total rice area and the preferred irrigation method is continuous flooding. In this study two water management systems ? continuous and intermittent flooding ? were monitored for the purpose of comparing their methane emission potential. Intermittent flooding was characterized by alternating flooding and draining periods during the rice cropping cycle. In both systems nitrogen fertilizers were applied twice (NPK and urea alone). Methane fluxes were determined using a closed chamber method (boxes 60x60 cm), and analyzed by GC-FID. Samples were collected from 4 boxes (2 boxes for each water management system) twice a week, for a weekly total of 46 samples. Measurements of air and soil temperature, soil and water pH, redox potential, plant biomass were done. After 104 days the accumulated fluxes resulted in a mean methane emission of 21.1 9 g CH4 m-2 d-1 under the continuous flooding regime and 23.9 g CH4 m-2 d-1 under the intermittent flooding regime. After the two N fertilizer application, methane fluxes decreased in all boxes, with a more marked reduction occurring in the intermittent regime stands. Total accumulated methane emissions, as well as grain yield, were evaluated for each water management system at the end of the cropping season, showing 13% higher productivity in the field under intermittent flooding system. The objectives of the present study were (i) to improve methane emission estimates and compare the emission potential of traditionally managed crop systems and (ii) to study the possibility of minimizing water consumption and the influence on the methane fluxes without deleterious effects to the crop.
650 $aArroz irrigado
650 $aMetano
700 1 $aVILELLA, O. V.
700 1 $aFRIGHETTO, R. T. S.
700 1 $aRACHMAN, M. A. L.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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| Registros recuperados : 3 | |
| 1. |  | FREITAS, J. A. de; RESENDE, M. A. V.; FALLIERE, J.; PENNA, J. C. V.; LANZA, M. A.; FARIAS, R. S. de; SILVA, P. J. da. Regeneracao e caracterizacao morfologico-agronomica de acessos de algodoeiro da EPAMIG. Revista de Oleaginosas e Fibrosas, v.2, n.3,p.21-54, 1999.| Biblioteca(s): Embrapa Algodão. |
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| 2. | | FREITAS, J. A. de; RESENDE, M. A. V.; FALLIERI, J.; PENNA, J. C. V.; LANZA, M. A.; FARIAS, R. S. de; SILVA, P. J. da. Regeneracao e caracterizacao morfologico-agronomica de acessos de algodoeiro da EPAMIG. Revista de Oleaginosas e Fibrosas, Campina Grande, v.3, n.1,p.21-54,1999.| Biblioteca(s): Embrapa Algodão. |
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| 3. | | ANDRADE, L. F.; GONÇALVES, N. P.; COUTINHO, C. R.; QUEIROZ, E. da S.; JORGE, K. F.; GUIMARÃES, C. P.; REIS, S. T. dos; FARIAS, R. S. de. Métodos alternativos e controle biológico de pragas do algodoeiro aplicados a agricultura familiar no Norte de Minas Gerais. In: CONGRESSO BRASILEIRO DO ALGODÃO, 6., 2007, Uberlândia. Resumos... Uberlândia, 2007. p. 1-5 1 CD-ROM| Biblioteca(s): Embrapa Algodão. |
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| Registros recuperados : 3 | |
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