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Registro Completo |
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Biblioteca(s): |
Embrapa Uva e Vinho. |
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Data corrente: |
20/08/2009 |
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Data da última atualização: |
17/09/2019 |
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Autoria: |
GOVAERTS, B.; VERHULST, N.; CASTELLANOS-NAVARRETE, A.; SAYRE, K. D.; DIXON, J.; DENDOOVEN, L. |
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Título: |
Conservation agriculture and soil carbon sequestration: between myth and farmer reality. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Critical Review in Plant Science, Philadelphia, v. 28, n. 3, p. 97-122, 2009. |
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Volume: |
28 |
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Páginas: |
97-122 |
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Idioma: |
Inglês |
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Conteúdo: |
Improving food security, environmental preservation and enhancing livelihood should be the main targets of the innovators of today's farming systems. Conservation agriculture (CA), based on minimum tillage, crop residue retention, and crop rotations, has been proposed as an alternative system combining benefits for the farmer with advantages for the society. This paper reviews the potential impact of CA on C sequestration by synthesizing the knowledge of carbon and nitrogen cycling in agriculture; summarizing the influence of tillage, residue management, and crop rotation on soil organic carbon stocks; and compiling the existing case study information. To evaluate the C sequestration capacity of farming practices, their influence on emissions from farming activities should be considered together with their influence on soil C stocks. The largest contribution of CA to reducing emissions from farming activities is made by the reduction of tillage operations. The soil C case study results are not conclusive. In 7 of the 78 cases withheld, the soil C stock was lower in zero compared to conventional tillage, in 40 cases it was higher, and in 31 of the cases there was no significant difference. The mechanisms that govern the balance between increased or no sequestration after conversion to zero tillage are not clear, although some factors that play a role can be distinguished, e.g., root development and rhizodeposits, baseline soil C content, bulk density and porosity, climate, landscape position, and erosion/deposition history. Altering crop rotation can influence soil C stocks by changing quantity and quality of organic matter input. More research is needed, especially in the tropical areas where good quantitative information is lacking. However, even if C sequestration is questionable in some areas and cropping systems, CA remains an important technology that improves soil processes, controls soil erosion and reduces production cost. MenosImproving food security, environmental preservation and enhancing livelihood should be the main targets of the innovators of today's farming systems. Conservation agriculture (CA), based on minimum tillage, crop residue retention, and crop rotations, has been proposed as an alternative system combining benefits for the farmer with advantages for the society. This paper reviews the potential impact of CA on C sequestration by synthesizing the knowledge of carbon and nitrogen cycling in agriculture; summarizing the influence of tillage, residue management, and crop rotation on soil organic carbon stocks; and compiling the existing case study information. To evaluate the C sequestration capacity of farming practices, their influence on emissions from farming activities should be considered together with their influence on soil C stocks. The largest contribution of CA to reducing emissions from farming activities is made by the reduction of tillage operations. The soil C case study results are not conclusive. In 7 of the 78 cases withheld, the soil C stock was lower in zero compared to conventional tillage, in 40 cases it was higher, and in 31 of the cases there was no significant difference. The mechanisms that govern the balance between increased or no sequestration after conversion to zero tillage are not clear, although some factors that play a role can be distinguished, e.g., root development and rhizodeposits, baseline soil C content, bulk density and porosity, climate, la... Mostrar Tudo |
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Palavras-Chave: |
CO2; Sequestro. |
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Thesagro: |
Agricultura; Carbono; Planta; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02718naa a2200277 a 4500
001 1544113
005 2019-09-17
008 2009 bl uuuu u00u1 u #d
100 1 $aGOVAERTS, B.
245 $aConservation agriculture and soil carbon sequestration$bbetween myth and farmer reality.$h[electronic resource]
260 $c2009
300 $a97-122 28
490 $v28
520 $aImproving food security, environmental preservation and enhancing livelihood should be the main targets of the innovators of today's farming systems. Conservation agriculture (CA), based on minimum tillage, crop residue retention, and crop rotations, has been proposed as an alternative system combining benefits for the farmer with advantages for the society. This paper reviews the potential impact of CA on C sequestration by synthesizing the knowledge of carbon and nitrogen cycling in agriculture; summarizing the influence of tillage, residue management, and crop rotation on soil organic carbon stocks; and compiling the existing case study information. To evaluate the C sequestration capacity of farming practices, their influence on emissions from farming activities should be considered together with their influence on soil C stocks. The largest contribution of CA to reducing emissions from farming activities is made by the reduction of tillage operations. The soil C case study results are not conclusive. In 7 of the 78 cases withheld, the soil C stock was lower in zero compared to conventional tillage, in 40 cases it was higher, and in 31 of the cases there was no significant difference. The mechanisms that govern the balance between increased or no sequestration after conversion to zero tillage are not clear, although some factors that play a role can be distinguished, e.g., root development and rhizodeposits, baseline soil C content, bulk density and porosity, climate, landscape position, and erosion/deposition history. Altering crop rotation can influence soil C stocks by changing quantity and quality of organic matter input. More research is needed, especially in the tropical areas where good quantitative information is lacking. However, even if C sequestration is questionable in some areas and cropping systems, CA remains an important technology that improves soil processes, controls soil erosion and reduces production cost.
650 $aAgricultura
650 $aCarbono
650 $aPlanta
650 $aSolo
653 $aCO2
653 $aSequestro
700 1 $aVERHULST, N.
700 1 $aCASTELLANOS-NAVARRETE, A.
700 1 $aSAYRE, K. D.
700 1 $aDIXON, J.
700 1 $aDENDOOVEN, L.
773 $tCritical Review in Plant Science, Philadelphia$gv. 28, n. 3, p. 97-122, 2009.
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| 2. |  | ZIMER, A. M.; MACHADO, M. M. P.; DALLACOSTA, L. J.; FERREIRA, C. F.; OLIVEIRA, C. R. de; PEREIRA, E. C. Desenvolvimento de membranas de óxido de alumínio anódico para ultramicrofiltração. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 6., 2012, Fortaleza. Anais... São Carlos: Embrapa Instrumentação; Fortaleza: Embrapa Agroindústria Tropical, 2012. p. 419-421. Editores: Maria Alice Martins, MOrsyleide de Freitas Rosa, Men de Sá Moreira de Souza Filho, Nicodemos Moreira dos Santos Junior, Odílio Benedito Garrido de Assis, Caue Ribeiro, Luiz Henrique Capparelli Mattoso.| Tipo: Artigo em Anais de Congresso |
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| 3. | | COSTA JUNIOR, L. J. D.; ZIMER, A. M.; MACHADO, M. M. P.; YAMAMOTO, C. F.; OLIVEIRA, C. R. de; PEREIRA, E. C. Aplicação de membranas de alumina anódica porosa como filtros físicos para microorganismos. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 6., 2012, Fortaleza. Anais... São Carlos: Embrapa Instrumentação; Fortaleza: Embrapa Agroindústria Tropical, 2012. p. 422-424. Editores: Maria Alice Martins, MOrsyleide de Freitas Rosa, Men de Sá Moreira de Souza Filho, Nicodemos Moreira dos Santos Junior, Odílio Benedito Garrido de Assis, Caue Ribeiro, Luiz Henrique Capparelli Mattoso.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| 4. | | ZIMER, A. M.; MACHADO, M. M. P.; COSTA JUNIOR, L. J. D.; IKE, P. T. L.; IEMMA, M. R. C.; OLIVEIRA, C. R. de; PEREIRA, E. C. Optimized porous anodic alumina membranes for water ultrafiltration of pathogenic bacteria (E. coli). Journal of Nanoscience and Nanotechnology, [S. l.], v. 16, p. 6526-6534, 2016.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Instrumentação. |
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| 5. | | ARAÚJO, A. M. de; PIRES, L. C.; SILVA, F. L. R. da; PAIVA, S. R.; COSTA, M. da S.; MORAES, J. de B.; MACHADO, M. M.; ALMEIDA, G. M. de; CUNHA, R. M. S.; BEFFA, M. Distância genética em caprinos naturalizados por meio de microssatélites de DNA. In: SIMPÓSIO BRASILEIRO DE MELHORAMENTO ANIMAL, 7., 2008, São Carlos, SP. Anais... São Carlos, SP: SBMA: Embrapa Pecuária Sudeste, 2008.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| Registros recuperados : 5 | |
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