| Registro completo |
| Provedor de dados: |
Rev. Bras. Ciênc. Solo
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| País: |
Brazil
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| Título: |
Particulate soil organic carbon and stratification ratio increases in response to crop residue decomposition under no-till
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| Autores: |
Briedis,Clever
Sá,João Carlos de Moraes
De-Carli,Roberto Simão
Antunes,Erielton Aparecido Pupo
Simon,Lucas
Romko,Marielle Leticia
Elias,Lucio Schenekenberg
Ferreira,Ademir de Oliveira
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| Data: |
2012-11-01
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| Ano: |
2012
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| Palavras-chave: |
Black oat
Carbon sequestration
Dry matter decomposition
Half-life
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| Resumo: |
In soils under no-tillage (NT), the continuous crop residue input to the surface layer leads to carbon (C) accumulation. This study evaluated a soil under NT in Ponta Grossa (State of Paraná, Brazil) for: 1) the decomposition of black oat (Avena strigosa Schreb.) residues, 2) relation of the biomass decomposition effect with the soil organic carbon (SOC) content, the particulate organic carbon (POC) content, and the soil carbon stratification ratio (SR) of an Inceptisol. The assessments were based on seven samplings (t0 to t6) in a period of 160 days of three transects with six sampling points each. The oat dry biomass was 5.02 Mg ha-1 at t0, however, after 160 days, only 17.8 % of the initial dry biomass was left on the soil surface. The SOC in the 0-5 cm layer varied from 27.56 (t0) to 30.07 g dm-3 (t6). The SR increased from 1.33 to 1.43 in 160 days. There was also an increase in the POC pool in this period, from 8.1 to 10.7 Mg ha-1. The increase in SOC in the 0-5 cm layer in the 160 days was mainly due to the increase of POC derived from oat residue decomposition. The linear relationship between SOC and POC showed that 21 % of SOC was due to the more labile fraction. The results indicated that the continuous input of residues could be intensified to increase the C pool and sequestration in soils under NT.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500012
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| Editor: |
Sociedade Brasileira de Ciência do Solo
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| Relação: |
10.1590/S0100-06832012000500012
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Ciência do Solo v.36 n.5 2012
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| Direitos: |
info:eu-repo/semantics/openAccess
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