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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
03/03/1995 |
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Data da última atualização: |
24/12/2007 |
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Autoria: |
ALBUQUERQUE, M. M. de. |
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Título: |
Pequena historia da formacao social brasileira. |
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Edição: |
2.ed. |
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Ano de publicação: |
1981 |
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Fonte/Imprenta: |
Rio de Janeiro: Graal, 1981. |
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Páginas: |
728p. |
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Série: |
(Biblioteca de Historia, 6) |
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Idioma: |
Português |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Sociologia. |
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Thesaurus Nal: |
Brazil; sociology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00455nam a2200181 a 4500
001 1095279
005 2007-12-24
008 1981 bl uuuu 00u1 u #d
100 1 $aALBUQUERQUE, M. M. de
245 $aPequena historia da formacao social brasileira.
250 $a2.ed.
260 $aRio de Janeiro: Graal$c1981
300 $a728p.
490 $a(Biblioteca de Historia, 6)
650 $aBrazil
650 $asociology
650 $aSociologia
653 $aBrasil
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Embrapa Unidades Centrais (AI-SEDE) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Suínos e Aves. Para informações adicionais entre em contato com cnpsa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
03/12/2020 |
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Data da última atualização: |
04/12/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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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. |
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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. |
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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. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Agronomy, v. 10, n. 1848, 2020. |
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DOI: |
10.3390/agronomy10121848. |
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Idioma: |
Inglês |
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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 |
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Palavras-Chave: |
Emissão de carbono. |
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Thesagro: |
Aveia; Cobertura do Solo; Cultivo Intensivo; Ervilhaca; Milho; Planta de Cobertura; Plantio Direto; Soja. |
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Categoria do assunto: |
-- |
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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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