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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
15/12/2016 |
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Data da última atualização: |
15/12/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BAYERA, C.; GOMES, J.; ZANATTA, J. A.; VIEIRA, F. C. B.; DIECKOW, J. |
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Afiliação: |
Cimélio Bayera, Universidade Federal do Rio Grande do Sul; Juliana Gomes, Pós-graduanda da Universidade Federal do Rio Grande do Sul; JOSILEIA ACORDI ZANATTA, CNPF; Frederico Costa Beber Vieira, Universidade Federal do Pampa; Jeferson Dieckow, Universidade Federal do Paraná. |
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Título: |
Mitigating greenhouse gas emissions from a subtropical Ultisol by using long-term no-tillage in combination with legume cover crops. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Soil & Tillage Research, v. 161, p. 86-94, Aug. 2016. |
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DOI: |
http://dx.doi.org/10.1016/j.still.2016.03.011 |
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Idioma: |
Inglês |
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Conteúdo: |
Greenhouse gas (GHG) emissions can be partially mitigated with conservation agriculture. In this study, we assessed the effects of conventional tillage (CT) and no-tillage (NT), as well as five NT cover crop-based cropping systems, on yield-scaled GHG emissions in two long-term experiments (18 and 19 years) on a subtropical Paleudult. Air samples collected in static closed chambers were used to measure nitrous oxide (N2O) and methane (CH4) fluxes. The annual rate of change in soil organic C from the beginning of the experiments was used as proxy for net CO2 flux. Cumulative annual emissions of the three GHG and the CO2 costs of agricultural inputs and operations were taken in full account when estimating the global warming potential (GWP). Under legume cover crops, NT soil exhibited increased N2O emissions relative to CT soil (531 vs 217 kg CO2eq ha1 yr1); however, emissions of this gas from NT soil were fully offset by CO2 retention in soil organic matter (2063 to 3940 kg CO2 ha1 yr1). Soil CH4 fluxes were very low with all management systems (1.5 to 30.5 kg CO2eq ha1 yr1). NT soil under legume cover crops behaved as a net sink for GHG (GWP ranged from 971 to 2818 kg CO2eq ha1 yr1); by contrast, CT soil and NT soil with a low biomass input were net sources of GHG (GWP ranged from 857 to 2133 kg CO2eq ha1 yr1). The legume cover crops increased maize yield and further reduced yield-scaled GHG emissions. This result suggests that conservation management practices involving no-till in combination with legume cover crops provide an effective approach to sustainable low-C footprint food production in subtropical regions. MenosGreenhouse gas (GHG) emissions can be partially mitigated with conservation agriculture. In this study, we assessed the effects of conventional tillage (CT) and no-tillage (NT), as well as five NT cover crop-based cropping systems, on yield-scaled GHG emissions in two long-term experiments (18 and 19 years) on a subtropical Paleudult. Air samples collected in static closed chambers were used to measure nitrous oxide (N2O) and methane (CH4) fluxes. The annual rate of change in soil organic C from the beginning of the experiments was used as proxy for net CO2 flux. Cumulative annual emissions of the three GHG and the CO2 costs of agricultural inputs and operations were taken in full account when estimating the global warming potential (GWP). Under legume cover crops, NT soil exhibited increased N2O emissions relative to CT soil (531 vs 217 kg CO2eq ha1 yr1); however, emissions of this gas from NT soil were fully offset by CO2 retention in soil organic matter (2063 to 3940 kg CO2 ha1 yr1). Soil CH4 fluxes were very low with all management systems (1.5 to 30.5 kg CO2eq ha1 yr1). NT soil under legume cover crops behaved as a net sink for GHG (GWP ranged from 971 to 2818 kg CO2eq ha1 yr1); by contrast, CT soil and NT soil with a low biomass input were net sources of GHG (GWP ranged from 857 to 2133 kg CO2eq ha1 yr1). The legume cover crops increased maize yield and further reduced yield-scaled GHG emissions. This result suggests that conservation management practices involving no-... Mostrar Tudo |
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Palavras-Chave: |
Gás de efeito estufa; Óxido nitroso; Sequestro de carbono. |
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Thesaurus Nal: |
Carbon sequestration; Greenhouse gas emissions; Long term experiments; Nitrous oxide. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02509naa a2200265 a 4500
001 2058698
005 2016-12-15
008 2016 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.still.2016.03.011$2DOI
100 1 $aBAYERA, C.
245 $aMitigating greenhouse gas emissions from a subtropical Ultisol by using long-term no-tillage in combination with legume cover crops.$h[electronic resource]
260 $c2016
520 $aGreenhouse gas (GHG) emissions can be partially mitigated with conservation agriculture. In this study, we assessed the effects of conventional tillage (CT) and no-tillage (NT), as well as five NT cover crop-based cropping systems, on yield-scaled GHG emissions in two long-term experiments (18 and 19 years) on a subtropical Paleudult. Air samples collected in static closed chambers were used to measure nitrous oxide (N2O) and methane (CH4) fluxes. The annual rate of change in soil organic C from the beginning of the experiments was used as proxy for net CO2 flux. Cumulative annual emissions of the three GHG and the CO2 costs of agricultural inputs and operations were taken in full account when estimating the global warming potential (GWP). Under legume cover crops, NT soil exhibited increased N2O emissions relative to CT soil (531 vs 217 kg CO2eq ha1 yr1); however, emissions of this gas from NT soil were fully offset by CO2 retention in soil organic matter (2063 to 3940 kg CO2 ha1 yr1). Soil CH4 fluxes were very low with all management systems (1.5 to 30.5 kg CO2eq ha1 yr1). NT soil under legume cover crops behaved as a net sink for GHG (GWP ranged from 971 to 2818 kg CO2eq ha1 yr1); by contrast, CT soil and NT soil with a low biomass input were net sources of GHG (GWP ranged from 857 to 2133 kg CO2eq ha1 yr1). The legume cover crops increased maize yield and further reduced yield-scaled GHG emissions. This result suggests that conservation management practices involving no-till in combination with legume cover crops provide an effective approach to sustainable low-C footprint food production in subtropical regions.
650 $aCarbon sequestration
650 $aGreenhouse gas emissions
650 $aLong term experiments
650 $aNitrous oxide
653 $aGás de efeito estufa
653 $aÓxido nitroso
653 $aSequestro de carbono
700 1 $aGOMES, J.
700 1 $aZANATTA, J. A.
700 1 $aVIEIRA, F. C. B.
700 1 $aDIECKOW, J.
773 $tSoil & Tillage Research$gv. 161, p. 86-94, Aug. 2016.
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Registro original: |
Embrapa Florestas (CNPF) |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
10/02/2009 |
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Data da última atualização: |
10/02/2009 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
MARTINS, P. K.; JORDÃO, B. Q.; YAMANAKA, N.; FARIAS, J. R. B.; BENEVENTI, M. A.; BINNECK, E.; FUGANTI, R.; STOLF, R.; NEPOMUCENO, A. L. |
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Afiliação: |
Polyana K. Martins, UEL; Berenice Q. Jordão, UEL; Naoki Yamanaka, JIRCAS; José Renato Bouças Farias. CNPSo; Magda Aparecida Beneventi, UEL; Eliseu Binneck, CNPSo; Renata Fuganti, UEL; Renata Stolf, UEL; Alexandre Lima Nepomuceno, CNPSo. |
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Título: |
Differential gene expression and mitotic cell analysis of the drought tolerant soybean (Glycine max L. Merrill Fabales, Fabaceae) cultivar MG/BR46 (Conquista) under two water deficit induction systems. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Genetics and Molecular Biology, Ribeirão Preto, v. 31, n. 2, p. 512-521, 2008. |
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Idioma: |
Inglês |
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Conteúdo: |
Drought cause serious yield losses in soybean (Glycine max), roots being the first plant organ to detect the water- stress signals triggering defense mechanisms. We used two drought induction systems to identify genes differentially expressed in the roots of the drought-tolerant soybean cultivar MG/BR46 (Conquista) and characterize their expression levels during water deficit. Soybean plants grown in nutrient solution hydroponically and in sand-pots were submitted to water stress and gene expression analysis was conducted using the differential display (DD) and real time polymerase chain reaction (PCR) techniques. Three differentially expressed mRNA transcripts showed homology to the Antirrhinum majus basic helix-loop-helix transcription factor bHLH, the Arabidopsis thaliana phosphatidylinositol transfer protein PITP and the auxin-independent growth regulator 1 (axi 1). The hydroponic experiments showed that after 100 min outside the nutrient solution photosynthesis completely stopped, stomata closed and leaf temperature rose. Both stress induction treatments produced significant decrease in the mitotic indices of root cells. Axi 1, PITP and bHLH were not only differentially expressed during dehydration in the hydroponics experiments but also during induced drought in the pot experiments. Although, there were differences between the two sets of experiments in the time at which up or down regulation occurred, the expression pattern of all three transcripts was related. Similar gene expression and cytological analysis results occurred in both systems, suggesting that hydroponics could be used to simulate drought detection by roots growing in soil and thus facilitate rapid and easy root sampling. MenosDrought cause serious yield losses in soybean (Glycine max), roots being the first plant organ to detect the water- stress signals triggering defense mechanisms. We used two drought induction systems to identify genes differentially expressed in the roots of the drought-tolerant soybean cultivar MG/BR46 (Conquista) and characterize their expression levels during water deficit. Soybean plants grown in nutrient solution hydroponically and in sand-pots were submitted to water stress and gene expression analysis was conducted using the differential display (DD) and real time polymerase chain reaction (PCR) techniques. Three differentially expressed mRNA transcripts showed homology to the Antirrhinum majus basic helix-loop-helix transcription factor bHLH, the Arabidopsis thaliana phosphatidylinositol transfer protein PITP and the auxin-independent growth regulator 1 (axi 1). The hydroponic experiments showed that after 100 min outside the nutrient solution photosynthesis completely stopped, stomata closed and leaf temperature rose. Both stress induction treatments produced significant decrease in the mitotic indices of root cells. Axi 1, PITP and bHLH were not only differentially expressed during dehydration in the hydroponics experiments but also during induced drought in the pot experiments. Although, there were differences between the two sets of experiments in the time at which up or down regulation occurred, the expression pattern of all three transcripts was related. Simila... Mostrar Tudo |
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Categoria do assunto: |
-- |
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URL: |
https://www.scielo.br/pdf/gmb/v31n2/a19v31n2.pdf
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Marc: |
LEADER 02469naa a2200217 a 4500
001 1471496
005 2009-02-10
008 2008 bl --- 0-- u #d
100 1 $aMARTINS, P. K.
245 $aDifferential gene expression and mitotic cell analysis of the drought tolerant soybean (Glycine max L. Merrill Fabales, Fabaceae) cultivar MG/BR46 (Conquista) under two water deficit induction systems.
260 $c2008
520 $aDrought cause serious yield losses in soybean (Glycine max), roots being the first plant organ to detect the water- stress signals triggering defense mechanisms. We used two drought induction systems to identify genes differentially expressed in the roots of the drought-tolerant soybean cultivar MG/BR46 (Conquista) and characterize their expression levels during water deficit. Soybean plants grown in nutrient solution hydroponically and in sand-pots were submitted to water stress and gene expression analysis was conducted using the differential display (DD) and real time polymerase chain reaction (PCR) techniques. Three differentially expressed mRNA transcripts showed homology to the Antirrhinum majus basic helix-loop-helix transcription factor bHLH, the Arabidopsis thaliana phosphatidylinositol transfer protein PITP and the auxin-independent growth regulator 1 (axi 1). The hydroponic experiments showed that after 100 min outside the nutrient solution photosynthesis completely stopped, stomata closed and leaf temperature rose. Both stress induction treatments produced significant decrease in the mitotic indices of root cells. Axi 1, PITP and bHLH were not only differentially expressed during dehydration in the hydroponics experiments but also during induced drought in the pot experiments. Although, there were differences between the two sets of experiments in the time at which up or down regulation occurred, the expression pattern of all three transcripts was related. Similar gene expression and cytological analysis results occurred in both systems, suggesting that hydroponics could be used to simulate drought detection by roots growing in soil and thus facilitate rapid and easy root sampling.
700 1 $aJORDÃO, B. Q.
700 1 $aYAMANAKA, N.
700 1 $aFARIAS, J. R. B.
700 1 $aBENEVENTI, M. A.
700 1 $aBINNECK, E.
700 1 $aFUGANTI, R.
700 1 $aSTOLF, R.
700 1 $aNEPOMUCENO, A. L.
773 $tGenetics and Molecular Biology, Ribeirão Preto$gv. 31, n. 2, p. 512-521, 2008.
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