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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: |
05/09/2017 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
COSTA, F. de S.; LIMA, M. A. de; BAYER, C.; FRIGHETTO, R. T. S.; BOHNEN, H.; MACEDO, V. R. M.; MARCOLIN, E. |
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Afiliação: |
F. de S. COSTA; MAGDA APARECIDA DE LIMA, CNPMA; C. BAYER; ROSA TOYOKO SHIRAISHI FRIGHETTO, CNPMA; H. BOHNEN; V. R. M. MACEDO; E. MARCOLIN. |
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Título: |
Methane emissions from a flooded rice field in the south of 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. 190-197. |
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Idioma: |
Inglês |
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Conteúdo: |
The State of Rio Grande do Sul in Brazil cultivates about 1Mha of rice in paddy fields. The soils are prepared using either conventional tillage (CT, 41% of the area) or no tillage (NT, 14% of area), the remaining falling in a mixed soil-preparation category. The outcomes of the current study represent the first evaluation of CH4 emissions from flooded rice fields in the south of Brazil. This information will feed the Brazilian greenhouse gas inventory. The study was carried out from January through March 2003 at the IRGA experimental station located in the municipality of Cachoerinha, Rio Grande do Sul, Brazil. Rice has been cultivated in this Gleisol area since 1994 using either the CT or NT system. The closed chamber method was used to collect air samples from 9:00 AM to 12:00 Noon on a weekly basis or in 24-hour campaigns; samples were analyzed using gas chromatography. Soil and plant parameters were also measured in order to determine which ecosystem factors affect CH4 emissions from the soil into the atmosphere. Along the period, CH4 emission rates varied from 24 to 703 mg m-2 day-1. NT plot emissions were initially greater than those from the CT plot, probably due to having maintained the crop residues on the surface of soil in the NT system. Nevertheless, CH4 emission rates in the CT plot were higher than in the NT plot 14 days after flooding, probably due to the higher root mass in the deeper soil layer in the NT system. The close relationship (P<0.01) found between CH4 emissions and soil temperature in both systems explains 60% of CH4 emissions. Total CH4 emissions were 33 and 22 g m-2 in the CT and NT systems, respectively. The emission variation between the soil preparation systems corresponds to 2,860 kg ha-1 CO2 equivalents. Moreover, this reduction represents 0.8 Mg ha-1 yr-1 C equivalents, greater than the average value of 0.58 Mg C ha-1 year-1 for C sequestration in agricultural soils in the subtropical region of Brazil. The 24-hour campaign emissions produced a sigmoid curve into both the atmosphere and the chamber, albeit with an inverse relationship. The 24-hour emissions were controlled by the soil and flood-water temperatures. MenosThe State of Rio Grande do Sul in Brazil cultivates about 1Mha of rice in paddy fields. The soils are prepared using either conventional tillage (CT, 41% of the area) or no tillage (NT, 14% of area), the remaining falling in a mixed soil-preparation category. The outcomes of the current study represent the first evaluation of CH4 emissions from flooded rice fields in the south of Brazil. This information will feed the Brazilian greenhouse gas inventory. The study was carried out from January through March 2003 at the IRGA experimental station located in the municipality of Cachoerinha, Rio Grande do Sul, Brazil. Rice has been cultivated in this Gleisol area since 1994 using either the CT or NT system. The closed chamber method was used to collect air samples from 9:00 AM to 12:00 Noon on a weekly basis or in 24-hour campaigns; samples were analyzed using gas chromatography. Soil and plant parameters were also measured in order to determine which ecosystem factors affect CH4 emissions from the soil into the atmosphere. Along the period, CH4 emission rates varied from 24 to 703 mg m-2 day-1. NT plot emissions were initially greater than those from the CT plot, probably due to having maintained the crop residues on the surface of soil in the NT system. Nevertheless, CH4 emission rates in the CT plot were higher than in the NT plot 14 days after flooding, probably due to the higher root mass in the deeper soil layer in the NT system. The close relationship (P<0.01) found between... Mostrar Tudo |
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Thesagro: |
Arroz; 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/163485/1/Costa-methane.pdf
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Marc: |
LEADER 02877nam a2200205 a 4500
001 1015069
005 2017-09-05
008 2003 bl uuuu u00u1 u #d
100 1 $aCOSTA, F. de S.
245 $aMethane emissions from a flooded rice field in the south of Brazil.$h[electronic resource]
260 $aIn: INTERNATIONAL METHANE AND NITROUS OXIDE MITIGATION CONFERENCE, 3., 2003, Beijing. Proceedings... Beijing: China Coal Information Institute, 2003. p. 190-197.$c2003
520 $aThe State of Rio Grande do Sul in Brazil cultivates about 1Mha of rice in paddy fields. The soils are prepared using either conventional tillage (CT, 41% of the area) or no tillage (NT, 14% of area), the remaining falling in a mixed soil-preparation category. The outcomes of the current study represent the first evaluation of CH4 emissions from flooded rice fields in the south of Brazil. This information will feed the Brazilian greenhouse gas inventory. The study was carried out from January through March 2003 at the IRGA experimental station located in the municipality of Cachoerinha, Rio Grande do Sul, Brazil. Rice has been cultivated in this Gleisol area since 1994 using either the CT or NT system. The closed chamber method was used to collect air samples from 9:00 AM to 12:00 Noon on a weekly basis or in 24-hour campaigns; samples were analyzed using gas chromatography. Soil and plant parameters were also measured in order to determine which ecosystem factors affect CH4 emissions from the soil into the atmosphere. Along the period, CH4 emission rates varied from 24 to 703 mg m-2 day-1. NT plot emissions were initially greater than those from the CT plot, probably due to having maintained the crop residues on the surface of soil in the NT system. Nevertheless, CH4 emission rates in the CT plot were higher than in the NT plot 14 days after flooding, probably due to the higher root mass in the deeper soil layer in the NT system. The close relationship (P<0.01) found between CH4 emissions and soil temperature in both systems explains 60% of CH4 emissions. Total CH4 emissions were 33 and 22 g m-2 in the CT and NT systems, respectively. The emission variation between the soil preparation systems corresponds to 2,860 kg ha-1 CO2 equivalents. Moreover, this reduction represents 0.8 Mg ha-1 yr-1 C equivalents, greater than the average value of 0.58 Mg C ha-1 year-1 for C sequestration in agricultural soils in the subtropical region of Brazil. The 24-hour campaign emissions produced a sigmoid curve into both the atmosphere and the chamber, albeit with an inverse relationship. The 24-hour emissions were controlled by the soil and flood-water temperatures.
650 $aArroz
650 $aMetano
700 1 $aLIMA, M. A. de
700 1 $aBAYER, C.
700 1 $aFRIGHETTO, R. T. S.
700 1 $aBOHNEN, H.
700 1 $aMACEDO, V. R. M.
700 1 $aMARCOLIN, E.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
20/07/1995 |
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Data da última atualização: |
04/09/2019 |
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Autoria: |
GUEDES, R. N. C.; PICANÇO, M. C.; GUEDES, M. M. P.; MADEIRA, N. R. |
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Afiliação: |
RAUL NARCISO CARVALHO GUEDES, Universidade Federal de Viçosa - UFV/Departameto de Biologia Animal; MARCELO COUTINHO PICANÇO, Universidade Federal de Viçosa - UFV/Departameto de Biologia Animal; NELSA MARIA PINHEIRO GUEDES, Universidade Federal de Viçosa - UFV/Departameto de Fitotecnia; NUNO RODRIGO MADEIRA, Universidade Federal de Viçosa - UFV/Departameto de Biologia Animal. |
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Título: |
Sinergismo do óleo mineral sobre a toxidez de inseticidas para Scrobipalpuloides absoluta (Lepidoptera: Gelechiidae). |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 30, n. 3, p. 313-318, mar. 1995. |
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Idioma: |
Português |
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Notas: |
Título em inglês: Synergism of mineral oil in the insecticide toxicity for scrobipalpuloides absoluta (Lepidoptera: Gelechiidae). |
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Conteúdo: |
- Com a técnica de imersão de folhas de tomateiro em solução inseticida, foi conduzida uma série de bioensaios buscando evidenciar possíveis efeitos sinergistas do óleo mineral sobre os inseticidas cartape, abamectina, fentoato e permetrina na mortalidade de lagartas de terceiro e quarto instares da traça-do-tomateiro. Foram preparadas, com água, caldas contendo diferentes concentrações dos inseticidas com ou sem óleo mineral a 0,5%. Folhas de tomateiro foram imersas nas caldas inseticidas por cinco segundos, secadas ao ar, colocadas em placas-de-petri, infestadas com 40 lagartas de Scrobipalpuloides absoluta (Meyrick, 1917), e mantidas a 250 C e 70% de UR. A mortalidade era avaliada 24 horas depois e, através da razão entre a CLlO do inseticida e a CLlO do inseticida + óleo mineral, verificaram-se aumentos na potência dos inseticidas, variando de 2,40 a 6,46 vezes. Através da razão entre as CL99, o efeito sinergista foi maior nas misturas abamectina + óleo mineral (15,96 vezes) e permetrina + óleo mineral (7, 11 vezes) e menor nas misturas cartape + óleo mineral (2, 14 vezes) e fentoato + óleo mineral (1,79 vez). |
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Palavras-Chave: |
Abamectina; Cartap; Fentoato; Insect; Insecticide; Oil; Permetrina; Pest; Phentoate; Scrobipalpuloides absoluta; Toxicidade. |
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Thesagro: |
Inseticida; Inseto; Mineral; Praga. |
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Thesaurus NAL: |
permethrin; toxicity. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/201571/1/Sinergismo-do-oleo-mineral-sobre.pdf
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Marc: |
LEADER 02265naa a2200373 a 4500
001 2111882
005 2019-09-04
008 1995 bl uuuu u00u1 u #d
100 1 $aGUEDES, R. N. C.
245 $aSinergismo do óleo mineral sobre a toxidez de inseticidas para Scrobipalpuloides absoluta (Lepidoptera$bGelechiidae).
260 $c1995
500 $aTítulo em inglês: Synergism of mineral oil in the insecticide toxicity for scrobipalpuloides absoluta (Lepidoptera: Gelechiidae).
520 $a- Com a técnica de imersão de folhas de tomateiro em solução inseticida, foi conduzida uma série de bioensaios buscando evidenciar possíveis efeitos sinergistas do óleo mineral sobre os inseticidas cartape, abamectina, fentoato e permetrina na mortalidade de lagartas de terceiro e quarto instares da traça-do-tomateiro. Foram preparadas, com água, caldas contendo diferentes concentrações dos inseticidas com ou sem óleo mineral a 0,5%. Folhas de tomateiro foram imersas nas caldas inseticidas por cinco segundos, secadas ao ar, colocadas em placas-de-petri, infestadas com 40 lagartas de Scrobipalpuloides absoluta (Meyrick, 1917), e mantidas a 250 C e 70% de UR. A mortalidade era avaliada 24 horas depois e, através da razão entre a CLlO do inseticida e a CLlO do inseticida + óleo mineral, verificaram-se aumentos na potência dos inseticidas, variando de 2,40 a 6,46 vezes. Através da razão entre as CL99, o efeito sinergista foi maior nas misturas abamectina + óleo mineral (15,96 vezes) e permetrina + óleo mineral (7, 11 vezes) e menor nas misturas cartape + óleo mineral (2, 14 vezes) e fentoato + óleo mineral (1,79 vez).
650 $apermethrin
650 $atoxicity
650 $aInseticida
650 $aInseto
650 $aMineral
650 $aPraga
653 $aAbamectina
653 $aCartap
653 $aFentoato
653 $aInsect
653 $aInsecticide
653 $aOil
653 $aPermetrina
653 $aPest
653 $aPhentoate
653 $aScrobipalpuloides absoluta
653 $aToxicidade
700 1 $aPICANÇO, M. C.
700 1 $aGUEDES, M. M. P.
700 1 $aMADEIRA, N. R.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 30, n. 3, p. 313-318, mar. 1995.
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Embrapa Unidades Centrais (AI-SEDE) |
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