| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Acre. Para informações adicionais entre em contato com cpafac.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Acre; Embrapa Meio Ambiente. |
|
Data corrente: |
31/10/2014 |
|
Data da última atualização: |
06/07/2021 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
BAYER, C.; COSTA, F. de S.; PEDROSO, G. M.; ZSCHORNACK, T.; CAMARGO, E. S.; LIMA, M. A. de; FRIGHETTO, R. T. S.; GOMES, J.; MARCOLIN, E.; MACEDO, V. R. M. |
|
Afiliação: |
CIMELIO BAYER, UFRGS; FALBERNI DE SOUZA COSTA, CPAF-AC; GABRIEL MUNHOZ PEDROSO, UFRGS; TIAGO ZSCHORNACK, Instituto Riograndense do Arroz; ESTEFANIA S CAMARGO, UFRGS; MAGDA APARECIDA DE LIMA, CNPMA; ROSA TOYOKO SHIRAISHI FRIGHETTO, CNPMA; JULIANA GOMES, UFRGS; ELIO MARCOLIN, Instituto Riograndense do Arroz; VERA REGINA MUSSOI MACEDO, Instituto Riograndense do Arroz. |
|
Título: |
Yield-scaled greenhouse gas emissions from flood irrigated rice under long-term conventional tillage and no-till systems in a Humid Subtropical climate. |
|
Ano de publicação: |
2014 |
|
Fonte/Imprenta: |
Field Crops Research, Amsterdam, v. 162, p. 60-69, June 2014. |
|
ISSN: |
0378-4290 |
|
DOI: |
http://dx.doi.org/10.1016/j.fcr.2014.03.015 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Abstract: Soils under flooded rice (Oryza sativa L.) production are one of the major anthropogenic source of CH4 emissions, an important greenhouse gas (GHG) with a 25-times larger global warming potential (GWP) than CO2. No-till systems (NT) systems may be a viable alternative to mitigate GHG emissions in comparison to conventional tillage (CT). The objectives of this study were to evaluate on a field scale the long-term effects of CT and NT systems on soil CH4 and N2O emissions, rice yields and yield-scaled emissions during five growing seasons (GS) in Southern Brazil. In addition, a short-term greenhouse experiment was conducted to isolate the effect of winter crop [ryegrass (Lolium multiflorum L.)] biomass incorporation on soil CH4 efflux. Averaged across years, the NT system resulted in 21% lower seasonal CH4 emissions than the CT system, at 408 and 517 kg CH4 ha-1 GS-1, respectively. No significant effect of tillage system on N2O emissions was observed. Methane emission was responsible for 96.5% of partial GWP (pGWP = CH4 × 25 + N2O × 298), stressing the importance of this GHG for developing low GHGs rice systems. No significant effect of tillage system on rice grain yields (average of 7.8 Mg ha-1 GS-1) was detected. Consequently, the NT system resulted in 23% lower yield-scaled pGWP, at 1.35 and 1.76 kg CO2eq kg-1 grain for NT and CT treatments, respectively. According to the greenhouse study, the incorporation of ryegrass biomass into the soil resulted in 2.8 times larger cumulative CH4 emission than the surface application of biomass, at 347.4 and 125.5 g CH4 m-2, respectively, due to higher dissolved organic carbon (DOC) concentration and reduced soil environment in subsurface soil layers. Our results indicate that biomass incorporation is the main cause of higher CH4 emissions from conventionally tilled soil and that NT system is a viable alternative to reduce yield-scaled GHG emissions from flooded rice fields. MenosAbstract: Soils under flooded rice (Oryza sativa L.) production are one of the major anthropogenic source of CH4 emissions, an important greenhouse gas (GHG) with a 25-times larger global warming potential (GWP) than CO2. No-till systems (NT) systems may be a viable alternative to mitigate GHG emissions in comparison to conventional tillage (CT). The objectives of this study were to evaluate on a field scale the long-term effects of CT and NT systems on soil CH4 and N2O emissions, rice yields and yield-scaled emissions during five growing seasons (GS) in Southern Brazil. In addition, a short-term greenhouse experiment was conducted to isolate the effect of winter crop [ryegrass (Lolium multiflorum L.)] biomass incorporation on soil CH4 efflux. Averaged across years, the NT system resulted in 21% lower seasonal CH4 emissions than the CT system, at 408 and 517 kg CH4 ha-1 GS-1, respectively. No significant effect of tillage system on N2O emissions was observed. Methane emission was responsible for 96.5% of partial GWP (pGWP = CH4 × 25 + N2O × 298), stressing the importance of this GHG for developing low GHGs rice systems. No significant effect of tillage system on rice grain yields (average of 7.8 Mg ha-1 GS-1) was detected. Consequently, the NT system resulted in 23% lower yield-scaled pGWP, at 1.35 and 1.76 kg CO2eq kg-1 grain for NT and CT treatments, respectively. According to the greenhouse study, the incorporation of ryegrass biomass into the soil resulted in 2.8 times l... Mostrar Tudo |
|
Palavras-Chave: |
Cambio climático; Cero labranza; Condiciones inundadas; Cultivo del suelo; Flooded rice; Gases de invernadero; Global warming potential; Interacciones suelo-atmósfera; No-till system; Producción de dióxido de carbono; Producción de metano. |
|
Thesagro: |
Arroz inundado; Clima; Dióxido de carbono; Efeito estufa; Metano; Mudança climática; Oryza sativa; Plantio; Plantio direto; Solo. |
|
Thesaurus Nal: |
Carbon dioxide production; Climate change; Flooded conditions; greenhouse gases; methane; Methane production; nitrous oxide; No-tillage; Rice; Soil-atmosphere interactions; Tillage. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
Marc: |
LEADER 03825naa a2200637 a 4500
001 2001794
005 2021-07-06
008 2014 bl uuuu u00u1 u #d
022 $a0378-4290
024 7 $ahttp://dx.doi.org/10.1016/j.fcr.2014.03.015$2DOI
100 1 $aBAYER, C.
245 $aYield-scaled greenhouse gas emissions from flood irrigated rice under long-term conventional tillage and no-till systems in a Humid Subtropical climate.$h[electronic resource]
260 $c2014
520 $aAbstract: Soils under flooded rice (Oryza sativa L.) production are one of the major anthropogenic source of CH4 emissions, an important greenhouse gas (GHG) with a 25-times larger global warming potential (GWP) than CO2. No-till systems (NT) systems may be a viable alternative to mitigate GHG emissions in comparison to conventional tillage (CT). The objectives of this study were to evaluate on a field scale the long-term effects of CT and NT systems on soil CH4 and N2O emissions, rice yields and yield-scaled emissions during five growing seasons (GS) in Southern Brazil. In addition, a short-term greenhouse experiment was conducted to isolate the effect of winter crop [ryegrass (Lolium multiflorum L.)] biomass incorporation on soil CH4 efflux. Averaged across years, the NT system resulted in 21% lower seasonal CH4 emissions than the CT system, at 408 and 517 kg CH4 ha-1 GS-1, respectively. No significant effect of tillage system on N2O emissions was observed. Methane emission was responsible for 96.5% of partial GWP (pGWP = CH4 × 25 + N2O × 298), stressing the importance of this GHG for developing low GHGs rice systems. No significant effect of tillage system on rice grain yields (average of 7.8 Mg ha-1 GS-1) was detected. Consequently, the NT system resulted in 23% lower yield-scaled pGWP, at 1.35 and 1.76 kg CO2eq kg-1 grain for NT and CT treatments, respectively. According to the greenhouse study, the incorporation of ryegrass biomass into the soil resulted in 2.8 times larger cumulative CH4 emission than the surface application of biomass, at 347.4 and 125.5 g CH4 m-2, respectively, due to higher dissolved organic carbon (DOC) concentration and reduced soil environment in subsurface soil layers. Our results indicate that biomass incorporation is the main cause of higher CH4 emissions from conventionally tilled soil and that NT system is a viable alternative to reduce yield-scaled GHG emissions from flooded rice fields.
650 $aCarbon dioxide production
650 $aClimate change
650 $aFlooded conditions
650 $agreenhouse gases
650 $amethane
650 $aMethane production
650 $anitrous oxide
650 $aNo-tillage
650 $aRice
650 $aSoil-atmosphere interactions
650 $aTillage
650 $aArroz inundado
650 $aClima
650 $aDióxido de carbono
650 $aEfeito estufa
650 $aMetano
650 $aMudança climática
650 $aOryza sativa
650 $aPlantio
650 $aPlantio direto
650 $aSolo
653 $aCambio climático
653 $aCero labranza
653 $aCondiciones inundadas
653 $aCultivo del suelo
653 $aFlooded rice
653 $aGases de invernadero
653 $aGlobal warming potential
653 $aInteracciones suelo-atmósfera
653 $aNo-till system
653 $aProducción de dióxido de carbono
653 $aProducción de metano
700 1 $aCOSTA, F. de S.
700 1 $aPEDROSO, G. M.
700 1 $aZSCHORNACK, T.
700 1 $aCAMARGO, E. S.
700 1 $aLIMA, M. A. de
700 1 $aFRIGHETTO, R. T. S.
700 1 $aGOMES, J.
700 1 $aMARCOLIN, E.
700 1 $aMACEDO, V. R. M.
773 $tField Crops Research, Amsterdam$gv. 162, p. 60-69, June 2014.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Acre (CPAF-AC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Agropecuária Oeste. |
|
Data corrente: |
22/02/2023 |
|
Data da última atualização: |
22/02/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 3 |
|
Autoria: |
FERNANDES, E. T.; AVILA, C. J.; SILVA, I. F. da. |
|
Afiliação: |
EIRES TOSTA FERNANDES, UNIVERSIDADE FEDERAL DA GRANDE DOURADOS, DOURADOS; CREBIO JOSE AVILA, CPAO; IVANA FERNANDES DA SILVA. |
|
Título: |
Effects of different levels of artificial defoliation on the vegetative and reproductive stages of soybean. |
|
Ano de publicação: |
2022 |
|
Fonte/Imprenta: |
EntomoBrasilis, v. 15, e991, 2022. |
|
DOI: |
10.12741/ebrasilis.v15.e991 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Any factor that may limit the leaf area of the crop in soybean may compromise its development and, consequently, its productivity. The aim of the study was to evaluate the effect of different levels of artificial defoliation performed in the vegetative and reproductive stages of two soybean cultivars, FT Campo Mourão and Brasmax Potência. The treatments consisted in: 1) Without defoliation throughout the culture cycle; 2) 16.7% defoliation in the vegetative stage; 3) 33.3% on vegetative stage; 4) 16.7% on reproductive stage; 5) 33.3% on reproductive stage; 6) 16.7% throughout the soybean cycle; 7) 33.3% defoliation throughout the soybean cycle. Regardless of the level of defoliation performed on soybeans, it was found that the cultivar Brasmax Potência presented the higher values of plant height, number of pods/plant and green weight of the aerial part, when compared to cultivar FT Campo Mourão. However, the number of pods/plant, green weight of the areal part, grain yield and weight of the seeds were not influenced by the defoliation intensities applied to the soybean. Based on the results, the threshold level of 30% of defoliation in the vegetative stage or 15% in the reproductive stage of soybean is still considered valid for the control of defoliating caterpillars in soybean crop. |
|
Thesagro: |
Doença de Planta; Soja. |
|
Categoria do assunto: |
O Insetos e Entomologia |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1151863/1/991-Article-Text-11756-9586-10-20220616.pdf
|
|
Marc: |
LEADER 01865naa a2200181 a 4500
001 2151863
005 2023-02-22
008 2022 bl uuuu u00u1 u #d
024 7 $a10.12741/ebrasilis.v15.e991$2DOI
100 1 $aFERNANDES, E. T.
245 $aEffects of different levels of artificial defoliation on the vegetative and reproductive stages of soybean.$h[electronic resource]
260 $c2022
520 $aAny factor that may limit the leaf area of the crop in soybean may compromise its development and, consequently, its productivity. The aim of the study was to evaluate the effect of different levels of artificial defoliation performed in the vegetative and reproductive stages of two soybean cultivars, FT Campo Mourão and Brasmax Potência. The treatments consisted in: 1) Without defoliation throughout the culture cycle; 2) 16.7% defoliation in the vegetative stage; 3) 33.3% on vegetative stage; 4) 16.7% on reproductive stage; 5) 33.3% on reproductive stage; 6) 16.7% throughout the soybean cycle; 7) 33.3% defoliation throughout the soybean cycle. Regardless of the level of defoliation performed on soybeans, it was found that the cultivar Brasmax Potência presented the higher values of plant height, number of pods/plant and green weight of the aerial part, when compared to cultivar FT Campo Mourão. However, the number of pods/plant, green weight of the areal part, grain yield and weight of the seeds were not influenced by the defoliation intensities applied to the soybean. Based on the results, the threshold level of 30% of defoliation in the vegetative stage or 15% in the reproductive stage of soybean is still considered valid for the control of defoliating caterpillars in soybean crop.
650 $aDoença de Planta
650 $aSoja
700 1 $aAVILA, C. J.
700 1 $aSILVA, I. F. da
773 $tEntomoBrasilis$gv. 15, e991, 2022.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agropecuária Oeste (CPAO) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
