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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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Embrapa Uva e Vinho (CNPUV) |
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Biblioteca(s): |
Embrapa Algodão. |
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Data corrente: |
22/11/2011 |
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Data da última atualização: |
12/12/2011 |
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Autoria: |
ROSA, C. E.; FURLANI JÚNIOR, E.; FERRARI, S.; LUQUES, A. P. P. G.; FERRARI, J. V.; SANTOS, D. M. A. dos; VIEIRA, H. S. da S.; VERTUAN, L. F. |
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Afiliação: |
CARLOS EDUARDO ROSA; ENES FURLANI JÚNIOR; SAMUEL FERRARI; ANA PAULA PORTUGAL GOUVÊA LUQUES; JOÃO VITOR FERRARI; DANILO MARCELO AIRES DOS SANTOS; HALLISON SODRÉ DA SILVA VIEIRA; LUIS FERNANDO VERTUAN. |
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Título: |
Aplicação de subdoses de grifosato e características vegetativas e produtivas do algodoeiro. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
IN: CONGRESSO BRASILEIRO DO ALGODÃO, 8.; COTTON EXPO, 1., 2011, São Paulo. Evolução da cadeia para construção de um setor forte: Anais. Campina Grande, PB: Embrapa Algodão, 2011. |
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Páginas: |
p.605-611 |
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Idioma: |
Português |
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Palavras-Chave: |
GOSSYPIUM HIRTUSUM; HORMESE. |
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Thesagro: |
Algodão; Herbicida; Produção. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/47395/1/FIT-030Poster.218.pdf
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Marc: |
LEADER 00883naa a2200265 a 4500
001 1906705
005 2011-12-12
008 2011 bl uuuu u00u1 u #d
100 1 $aROSA, C. E.
245 $aAplicação de subdoses de grifosato e características vegetativas e produtivas do algodoeiro.
260 $c2011
300 $ap.605-611
650 $aAlgodão
650 $aHerbicida
650 $aProdução
653 $aGOSSYPIUM HIRTUSUM
653 $aHORMESE
700 1 $aFURLANI JÚNIOR, E.
700 1 $aFERRARI, S.
700 1 $aLUQUES, A. P. P. G.
700 1 $aFERRARI, J. V.
700 1 $aSANTOS, D. M. A. dos
700 1 $aVIEIRA, H. S. da S.
700 1 $aVERTUAN, L. F.
773 $tIN: CONGRESSO BRASILEIRO DO ALGODÃO, 8.; COTTON EXPO, 1., 2011, São Paulo. Evolução da cadeia para construção de um setor forte: Anais. Campina Grande, PB: Embrapa Algodão, 2011.
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