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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
15/03/2012 |
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Data da última atualização: |
15/03/2012 |
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Autoria: |
SOMMER, R.; DENICH, M.; VLEK, P. L. G. |
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Título: |
Carbon storage and root penetration in deep soils under small-farmer land-use systems in the Eastern Amazon region, Brazil. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Plant and Soil, v. 219, n. 1/2, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
The north-east of Pará state in the Eastern Amazon of Brazil was settled over 100 years ago. Today the region is an agricultural landscape with variously-aged secondary vegetation and fields with annual cultures, plantation crops and pastures. The effect of these different land covers on carbon sequestration as well as on water and nutrient extraction remain subject of debate. Therefore, we assessed the importance of land use on soil carbon stocks by measuring various C fractions and root biomass (0?6 m) in slash-and-burn systems and (semi-) permanent cultures. An extensive root system down to at least 6 m depth was present under various secondary vegetation stands and slashed and burned fields recently taken into cultivation as well as under a primary forest. Shallower rooting patterns were evident under (permanent) oil palm (4.5 m) and (semi-permanent) passion fruit plantations (2.5 m). Carbon storage in soils of traditional slash-and-burn agriculture up to 6 m depth (185 t ha1) was not significantly lower than under a primary forest (196 t ha1) but declined significantly under (semi-) permanent cultures (to 146?167 t ha1). Compared to above-ground C losses, soil C losses due to slash-and-burn agriculture may thus be small. This is an argument for maintaining the secondary vegetation as part of the agricultural land-use system, as the root system of its trees is conserved and thus C is sequestered also at greater depth. |
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Palavras-Chave: |
Corte e queima; Sequestro de carbono; Tipitamba. |
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Thesagro: |
Carvão Vegetal; Vegetação Secundária. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02106naa a2200217 a 4500
001 1919004
005 2012-03-15
008 2000 bl uuuu u00u1 u #d
100 1 $aSOMMER, R.
245 $aCarbon storage and root penetration in deep soils under small-farmer land-use systems in the Eastern Amazon region, Brazil.
260 $c2000
520 $aThe north-east of Pará state in the Eastern Amazon of Brazil was settled over 100 years ago. Today the region is an agricultural landscape with variously-aged secondary vegetation and fields with annual cultures, plantation crops and pastures. The effect of these different land covers on carbon sequestration as well as on water and nutrient extraction remain subject of debate. Therefore, we assessed the importance of land use on soil carbon stocks by measuring various C fractions and root biomass (0?6 m) in slash-and-burn systems and (semi-) permanent cultures. An extensive root system down to at least 6 m depth was present under various secondary vegetation stands and slashed and burned fields recently taken into cultivation as well as under a primary forest. Shallower rooting patterns were evident under (permanent) oil palm (4.5 m) and (semi-permanent) passion fruit plantations (2.5 m). Carbon storage in soils of traditional slash-and-burn agriculture up to 6 m depth (185 t ha1) was not significantly lower than under a primary forest (196 t ha1) but declined significantly under (semi-) permanent cultures (to 146?167 t ha1). Compared to above-ground C losses, soil C losses due to slash-and-burn agriculture may thus be small. This is an argument for maintaining the secondary vegetation as part of the agricultural land-use system, as the root system of its trees is conserved and thus C is sequestered also at greater depth.
650 $aAmazonia
650 $aCarvão Vegetal
650 $aVegetação Secundária
653 $aCorte e queima
653 $aSequestro de carbono
653 $aTipitamba
700 1 $aDENICH, M.
700 1 $aVLEK, P. L. G.
773 $tPlant and Soil$gv. 219, n. 1/2, 2000.
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| 1. |  | FLORES, D. W. M.; LABEGALINI, A. M.; FERREIRA, M. D.; COLNAGO, L. A.; SPOTO, M. H. F. Estudo da aplicação do infravermelho médio para predição de parâmetros pós-colheita de laranjas intactas (Citrus Sinensis L. Osbeck). In: CONGRESSO BRASILEIRO DE PROCESSAMENTO MÍNIMO E PÓS COLHEITA DE FRUTAS, FLORES E HORTALIÇAS, 1.; SIMPÓSIO BRASILEIRO DE PÓS-COLHEITA, FRUTAS, HORTALIÇAS E FLORES, 5.; ENCONTRO NACIONAL SOBRE PROCESSAMENTO MÍNIMO DE FRUTAS E HORTALIÇAS, 8., 2015, Aracaju, SE. Anais... Aracaju, SE: CBPMPC, 2015. Não paginado. 8 f.| Tipo: Artigo em Anais de Congresso |
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