|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
24/07/2017 |
Data da última atualização: |
04/12/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
TONUCCI, R. G.; NAIR, V. D.; NAIR, P. K. R.; GARCIA. R. |
Afiliação: |
RAFAEL GONCALVES TONUCCI, CNPC; Vimala D. Nair, Soil and Water Sciences Department, University of Florida, Gainesville, FL, USA; P. K. Ramachandran Nair, Soil and Water Sciences Department, University of Florida, Gainesville, FL, USA; Rasmo Garcia, Animal Science Department Federal University of Viçosa (UFV) - Viçosa, MG, Brazil. |
Título: |
Grass vs. tree origin of soil organic carbon under different land-use systems in the Brazilian Cerrado. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Plant and Soil, v. 416, p. 1-12, 2017. Online first 21 July 2017. |
DOI: |
10.1007/s11104-017-3347-1 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: Background and Aims: Silvopastoral management of tree plantations is becoming popular in Brazil. The impact of this practice on carbon dynamics of these soils is unknown, and predicting it is difficult because historical land-use records of the region do not exist. The objective of the study was to quantify the relative soil organic carbon (SOC) contributions of C3 and C4 plants in different land-use system. Methods - We evaluated total delta13C, the contribution of C4 and C3-derived soil organic C in three fraction-size classes of soils in six land-use systems (Eucalyptus hybrid plantations established in 1985 and 2005; a native forest; silvopasture stands of Brachiaria brizantha under eucalyptus established in 1994 and 2004; and an open pasture), and undertook carbon dating (14C) for three of those systems, an Oxisol in Minas Gerais, Brazil. From each system, soil samples were collected from four depths (0-10, 10-20, 20-50, and 50-100 cm); samples were fractionated into 250-2000, 53-250, and <53 µm size classes, and their delta13C determined. Carbon dating (14C analysis) was done for whole soil samples from 0 to 10 cm and 50-100 cm depth classes of three land-use systems. Results - The delta13C values increased (showing increase in C contribution by C4 plants, i.e., grasses) with soil depth at all sites and all size-classes. The older systems showed a higher contribution of C4-derived SOC at all depths. Carbon dating indicated that the area had been cleared about 300 years ago. Conclusions - Silvopastoral and pasture systems can be considered as good carbon sinks. We infer that the study site was grassland with high proportion of C4 plants in the past, not a forest as it is today. MenosAbstract: Background and Aims: Silvopastoral management of tree plantations is becoming popular in Brazil. The impact of this practice on carbon dynamics of these soils is unknown, and predicting it is difficult because historical land-use records of the region do not exist. The objective of the study was to quantify the relative soil organic carbon (SOC) contributions of C3 and C4 plants in different land-use system. Methods - We evaluated total delta13C, the contribution of C4 and C3-derived soil organic C in three fraction-size classes of soils in six land-use systems (Eucalyptus hybrid plantations established in 1985 and 2005; a native forest; silvopasture stands of Brachiaria brizantha under eucalyptus established in 1994 and 2004; and an open pasture), and undertook carbon dating (14C) for three of those systems, an Oxisol in Minas Gerais, Brazil. From each system, soil samples were collected from four depths (0-10, 10-20, 20-50, and 50-100 cm); samples were fractionated into 250-2000, 53-250, and <53 µm size classes, and their delta13C determined. Carbon dating (14C analysis) was done for whole soil samples from 0 to 10 cm and 50-100 cm depth classes of three land-use systems. Results - The delta13C values increased (showing increase in C contribution by C4 plants, i.e., grasses) with soil depth at all sites and all size-classes. The older systems showed a higher contribution of C4-derived SOC at all depths. Carbon dating indicated that the area had been cleared about... Mostrar Tudo |
Palavras-Chave: |
Agroforestry systems; Carbon dating; Sistema silvopastoril; Sistemas agroflorestais; Soil fractionation; Stable isotope ratio analysis. |
Thesagro: |
Brachiaria Brizantha; Carbono; Cerrado; Eucalyptus spp; Fracionamento; Matéria orgânica; Solo. |
Thesaurus Nal: |
Agroforestry; Brazil; Grassland soils; Silvopastoral systems; Soil chemistry. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
Marc: |
LEADER 02854naa a2200385 a 4500 001 2073043 005 2017-12-04 008 2017 bl uuuu u00u1 u #d 024 7 $a10.1007/s11104-017-3347-1$2DOI 100 1 $aTONUCCI, R. G. 245 $aGrass vs. tree origin of soil organic carbon under different land-use systems in the Brazilian Cerrado.$h[electronic resource] 260 $c2017 520 $aAbstract: Background and Aims: Silvopastoral management of tree plantations is becoming popular in Brazil. The impact of this practice on carbon dynamics of these soils is unknown, and predicting it is difficult because historical land-use records of the region do not exist. The objective of the study was to quantify the relative soil organic carbon (SOC) contributions of C3 and C4 plants in different land-use system. Methods - We evaluated total delta13C, the contribution of C4 and C3-derived soil organic C in three fraction-size classes of soils in six land-use systems (Eucalyptus hybrid plantations established in 1985 and 2005; a native forest; silvopasture stands of Brachiaria brizantha under eucalyptus established in 1994 and 2004; and an open pasture), and undertook carbon dating (14C) for three of those systems, an Oxisol in Minas Gerais, Brazil. From each system, soil samples were collected from four depths (0-10, 10-20, 20-50, and 50-100 cm); samples were fractionated into 250-2000, 53-250, and <53 µm size classes, and their delta13C determined. Carbon dating (14C analysis) was done for whole soil samples from 0 to 10 cm and 50-100 cm depth classes of three land-use systems. Results - The delta13C values increased (showing increase in C contribution by C4 plants, i.e., grasses) with soil depth at all sites and all size-classes. The older systems showed a higher contribution of C4-derived SOC at all depths. Carbon dating indicated that the area had been cleared about 300 years ago. Conclusions - Silvopastoral and pasture systems can be considered as good carbon sinks. We infer that the study site was grassland with high proportion of C4 plants in the past, not a forest as it is today. 650 $aAgroforestry 650 $aBrazil 650 $aGrassland soils 650 $aSilvopastoral systems 650 $aSoil chemistry 650 $aBrachiaria Brizantha 650 $aCarbono 650 $aCerrado 650 $aEucalyptus spp 650 $aFracionamento 650 $aMatéria orgânica 650 $aSolo 653 $aAgroforestry systems 653 $aCarbon dating 653 $aSistema silvopastoril 653 $aSistemas agroflorestais 653 $aSoil fractionation 653 $aStable isotope ratio analysis 700 1 $aNAIR, V. D. 700 1 $aNAIR, P. K. R. 700 1 $aGARCIA. R. 773 $tPlant and Soil$gv. 416, p. 1-12, 2017. Online first 21 July 2017.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Arroz e Feijão. |
Data corrente: |
22/03/2004 |
Data da última atualização: |
22/03/2004 |
Autoria: |
BERNARDES, F. de S.; PORTES, T. A. e C.; DIDONET, A. D.; MARTIN-DIDONET, C. C. G. |
Título: |
Estudo sobre a influência de Azospirillum brasilense Sp 245 no estádio de plântula em quatro espécies diferentes de leguminosas. |
Ano de publicação: |
2003 |
Fonte/Imprenta: |
Brazilian Journal of Plant Physiology, Piracicaba, v. 15, p. 424, set. 2003. Suplemento. Edição de Resumos do IX Congresso Brasileiro de Fisiologia Vegetal, Atibaia, SP, set. 2003. |
Idioma: |
Português |
Thesagro: |
Inoculação; Leguminosa. |
Thesaurus NAL: |
Azospirillum brasilense. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00730naa a2200181 a 4500 001 1212006 005 2004-03-22 008 2003 bl uuuu u00u1 u #d 100 1 $aBERNARDES, F. de S. 245 $aEstudo sobre a influência de Azospirillum brasilense Sp 245 no estádio de plântula em quatro espécies diferentes de leguminosas. 260 $c2003 650 $aAzospirillum brasilense 650 $aInoculação 650 $aLeguminosa 700 1 $aPORTES, T. A. e C. 700 1 $aDIDONET, A. D. 700 1 $aMARTIN-DIDONET, C. C. G. 773 $tBrazilian Journal of Plant Physiology, Piracicaba$gv. 15, p. 424, set. 2003. Suplemento. Edição de Resumos do IX Congresso Brasileiro de Fisiologia Vegetal, Atibaia, SP, set. 2003.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Expressão de busca inválida. Verifique!!! |
|
|