| Texto completo | |
| Autor(es): |
da Silva Oliveira, Dener Marcio
[1, 2]
;
Paustian, Keith
[3, 2]
;
Davies, Christian Andrew
[4]
;
Cherubin, Mauricio Roberto
[5]
;
Franco, Andre Luiz Custodio
[6]
;
Cerri, Carlos Clemente
[5]
;
Pellegrino Cerri, Carlos Eduardo
[1]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Soil Sci, BR-13418900 Piracicaba, SP - Brazil
[2] Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 - USA
[3] Colorado State Univ, Dept Soil & Crop Sci, Ft Collins, CO 80523 - USA
[4] Shell Technol Ctr Houston, Houston, TX 77082 - USA
[5] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13400970 Piracicaba, SP - Brazil
[6] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 - USA
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | AGRICULTURE ECOSYSTEMS & ENVIRONMENT; v. 228, p. 38-48, JUL 15 2016. |
| Citações Web of Science: | 12 |
| Resumo | |
In Brazil, sugarcane expansion for ethanol production has been predominantly on areas previously used as pasture. Losses of C and N induced by land use change raise controversies about the environmental suitability of biofuel production. Therefore, we conducted a field study within the largest sugarcane producing region of Brazil to evaluate the effects of the primary land use change (LUC) sequence in sugarcane expansion areas (i.e., native vegetation to pasture to sugarcane), on C and N dynamics in the top 1 m soil layer. The LUC sequences caused substantial but varying changes in soil C and N stocks in areas undergoing expansion of sugarcane in south-central Brazil. The increase of C stocks in areas converted from pasture to sugarcane cultivation was 1.97 Mg ha(-1) yr(-1), in contrast to conversion of native vegetation to pasture, which decreased soil C stocks by 1.01 Mg ha(-1) yr(-1) for 0-1.0 m soil layer. The use of C-13 measurements to partition soil C sources showed that the greater C stocks in sugarcane areas compared to pasture was due to retention of the native-C stocks and increased accrual of modern-C comparing to pasture. Finally, the inclusion of deeper soil layers, at least down to 1.0 m depth, is essential to assess the impacts of LUC on C balances in agricultural areas. (C) 2016 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 15/14122-6 - Estimativa das alterações nos estoques de C no solo associadas à expansão da cana-de-açúcar em áreas de pastagens no Brasil |
| Beneficiário: | Dener Márcio da Silva Oliveira |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |
| Processo FAPESP: | 14/08632-9 - Matéria orgânica do solo em áreas de mudança de uso da terra para cultivo da cana-de-açúcar no Centro-Sul do Brasil |
| Beneficiário: | Dener Márcio da Silva Oliveira |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 13/17581-6 - QUALIDADE DO SOLO EM ÁREAS DE MUDANÇA DE USO DA TERRA PARA CULTIVO DA CANA-DE-AÇÚCAR NO CENTRO-SUL DO BRASIL - bases para avaliação da sustentabilidade ambiental do etanol |
| Beneficiário: | Maurício Roberto Cherubin |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 14/16612-8 - Resposta de indicadores de qualidade do solo a mudança de uso da terra |
| Beneficiário: | Maurício Roberto Cherubin |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |