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Registro Completo |
Biblioteca(s): |
Embrapa Suínos e Aves. |
Data corrente: |
03/12/2020 |
Data da última atualização: |
04/12/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
LEAL, O. A.; AMADO, T. J. C.; FIORIN, J. E.; KELLER, C.; REIMCHE, G. B.; RICE, C. W.; NICOLOSO, R. da S.; BORTOLOTTO, R. P.; SCHWALBERT, R. |
Afiliação: |
OTÁVIO A. LEAL, UFSM; TELMO JORGE CARNEIRO AMADO, UFSC; JACKSON ERNANI FIORIN, Cooperativa Central Gaúcha Ltda; CRISTIANO KELLER, UFSM; GEOVANE REIMCHE, UFSM; CHARLES W. RICE, Kansas State University; RODRIGO DA SILVEIRA NICOLOSO, CNPSA; RAFAEL PIVOTTO BORTOLOTTO, Unicruz; RAÍ SCHWALBERT, UFSM. |
Título: |
Linking cover crop residue quality and tillage system to CO2-C emission, soil C and N stocks and crop yield based on a long-term experiment. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Agronomy, v. 10, n. 1848, 2020. |
DOI: |
10.3390/agronomy10121848. |
Idioma: |
Inglês |
Conteúdo: |
Abstract: Cover crops (CC), particularly legumes, are key to promote soil carbon (C) sequestration in no-tillage. Nevertheless, the mechanisms regulating this process need further elucidation within a broad comprehensive framework. Therefore, we investigated effects of CC quality: black oat (Avena strigosa Schreb) (oat), common vetch (Vicia sativa L.) (vetch), and oat + vetch on carbon dioxide-C (CO2-C) emission (124 days) under conventional- (CT), minimum- (MT) and no-tillage (NT) plots from a long-term experiment in Southern Brazil. Half-life time (t1/2) of CC residues and the apparent C balance (ACB) were obtained for CT and NT. We linked our data to long-term (22 years) soil C and nitrogen (N) stocks and crop yield data of our experimental field. Compared to CT, NT increased t1/2 of oat, oat + vetch and vetch by 3.9-, 3.1- and 3-fold, respectively; reduced CO2-C emissions in oat, oat + vetch and vetch by 500, 600 and 642 kg ha-1, respectively; and increased the ACB (influx) in oat + vetch (195%) and vetch (207%). For vetch, CO2-C emission in MT was 77% greater than NT. Legume CC should be preferentially combined with NT to reduce CO2-C emissions and avoid a flush of N into the soil. The legume based-NT system showed the greatest soil C and N sequestration rates, which were significantly and positively related to soybean (Glycine max (L.) Merrill) and maize (Zea mays L.) yield. Soil C (0?90 cm depth) and N (0?100 cm depth) sequestration increments of 1 kg ha-1 corresponded to soybean yield increments of 1.2 and 7.4 kg ha-1, respectively MenosAbstract: Cover crops (CC), particularly legumes, are key to promote soil carbon (C) sequestration in no-tillage. Nevertheless, the mechanisms regulating this process need further elucidation within a broad comprehensive framework. Therefore, we investigated effects of CC quality: black oat (Avena strigosa Schreb) (oat), common vetch (Vicia sativa L.) (vetch), and oat + vetch on carbon dioxide-C (CO2-C) emission (124 days) under conventional- (CT), minimum- (MT) and no-tillage (NT) plots from a long-term experiment in Southern Brazil. Half-life time (t1/2) of CC residues and the apparent C balance (ACB) were obtained for CT and NT. We linked our data to long-term (22 years) soil C and nitrogen (N) stocks and crop yield data of our experimental field. Compared to CT, NT increased t1/2 of oat, oat + vetch and vetch by 3.9-, 3.1- and 3-fold, respectively; reduced CO2-C emissions in oat, oat + vetch and vetch by 500, 600 and 642 kg ha-1, respectively; and increased the ACB (influx) in oat + vetch (195%) and vetch (207%). For vetch, CO2-C emission in MT was 77% greater than NT. Legume CC should be preferentially combined with NT to reduce CO2-C emissions and avoid a flush of N into the soil. The legume based-NT system showed the greatest soil C and N sequestration rates, which were significantly and positively related to soybean (Glycine max (L.) Merrill) and maize (Zea mays L.) yield. Soil C (0?90 cm depth) and N (0?100 cm depth) sequestration increments of 1 kg ha-1 corresponde... Mostrar Tudo |
Palavras-Chave: |
Emissão de carbono. |
Thesagro: |
Aveia; Cobertura do Solo; Cultivo Intensivo; Ervilhaca; Milho; Planta de Cobertura; Plantio Direto; Soja. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02538naa a2200337 a 4500 001 2127565 005 2020-12-04 008 2020 bl uuuu u00u1 u #d 024 7 $a10.3390/agronomy10121848.$2DOI 100 1 $aLEAL, O. A. 245 $aLinking cover crop residue quality and tillage system to CO2-C emission, soil C and N stocks and crop yield based on a long-term experiment.$h[electronic resource] 260 $c2020 520 $aAbstract: Cover crops (CC), particularly legumes, are key to promote soil carbon (C) sequestration in no-tillage. Nevertheless, the mechanisms regulating this process need further elucidation within a broad comprehensive framework. Therefore, we investigated effects of CC quality: black oat (Avena strigosa Schreb) (oat), common vetch (Vicia sativa L.) (vetch), and oat + vetch on carbon dioxide-C (CO2-C) emission (124 days) under conventional- (CT), minimum- (MT) and no-tillage (NT) plots from a long-term experiment in Southern Brazil. Half-life time (t1/2) of CC residues and the apparent C balance (ACB) were obtained for CT and NT. We linked our data to long-term (22 years) soil C and nitrogen (N) stocks and crop yield data of our experimental field. Compared to CT, NT increased t1/2 of oat, oat + vetch and vetch by 3.9-, 3.1- and 3-fold, respectively; reduced CO2-C emissions in oat, oat + vetch and vetch by 500, 600 and 642 kg ha-1, respectively; and increased the ACB (influx) in oat + vetch (195%) and vetch (207%). For vetch, CO2-C emission in MT was 77% greater than NT. Legume CC should be preferentially combined with NT to reduce CO2-C emissions and avoid a flush of N into the soil. The legume based-NT system showed the greatest soil C and N sequestration rates, which were significantly and positively related to soybean (Glycine max (L.) Merrill) and maize (Zea mays L.) yield. Soil C (0?90 cm depth) and N (0?100 cm depth) sequestration increments of 1 kg ha-1 corresponded to soybean yield increments of 1.2 and 7.4 kg ha-1, respectively 650 $aAveia 650 $aCobertura do Solo 650 $aCultivo Intensivo 650 $aErvilhaca 650 $aMilho 650 $aPlanta de Cobertura 650 $aPlantio Direto 650 $aSoja 653 $aEmissão de carbono 700 1 $aAMADO, T. J. C. 700 1 $aFIORIN, J. E. 700 1 $aKELLER, C. 700 1 $aREIMCHE, G. B. 700 1 $aRICE, C. W. 700 1 $aNICOLOSO, R. da S. 700 1 $aBORTOLOTTO, R. P. 700 1 $aSCHWALBERT, R. 773 $tAgronomy$gv. 10, n. 1848, 2020.
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Embrapa Suínos e Aves (CNPSA) |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
10/03/2017 |
Data da última atualização: |
04/07/2019 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
MAUÉS, M. M.; LEÃO, N. V. M.; SOUZA, D. B. |
Afiliação: |
MARCIA MOTTA MAUES, CPATU; NOEMI VIANNA MARTINS LEAO, CPATU; FCAP. |
Título: |
Distribuição espacial e fenologia reprodutiva de espécies de vegetação secundária em duas áreas de diferentes idades, no município de Igarapé-Açu (PA). |
Ano de publicação: |
1996 |
Fonte/Imprenta: |
In: CONGRESSO DE ECOLOGIA DO BRASIL, 3., 1996, Brasília, DF. Manejo de ecossistemas e mudanças globais: resumos. Brasília, DF: UNB: Sociedade de Ecologia do Brasil, 1996. |
Páginas: |
p. 94. |
Idioma: |
Português |
Palavras-Chave: |
Igarapé-Açu. |
Thesagro: |
Fenologia; Reprodução; Vegetação Secundária. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/199189/1/Distribuicao-espacial-e-fenologica.pdf
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Marc: |
LEADER 00728nam a2200181 a 4500 001 2066763 005 2019-07-04 008 1996 bl uuuu u00u1 u #d 100 1 $aMAUÉS, M. M. 245 $aDistribuição espacial e fenologia reprodutiva de espécies de vegetação secundária em duas áreas de diferentes idades, no município de Igarapé-Açu (PA). 260 $aIn: CONGRESSO DE ECOLOGIA DO BRASIL, 3., 1996, Brasília, DF. Manejo de ecossistemas e mudanças globais: resumos. Brasília, DF: UNB: Sociedade de Ecologia do Brasil$c1996 300 $ap. 94. 650 $aFenologia 650 $aReprodução 650 $aVegetação Secundária 653 $aIgarapé-Açu 700 1 $aLEÃO, N. V. M. 700 1 $aSOUZA, D. B.
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