Depth assessed and up-scaling of single case studies might overestimate the role of C sequestration by pastures in the commitments of Brazil's low-carbon agriculture plan

Autor(es)

de Oliveira, Daniele Costa ^[1] ; da Silva Oliveira, Dener Marcio ^[2] ; Alves de Freitas, Rita de Cassia ^{[1, 3]} ; Barreto, Matheus Sampaio ^[4] ; Munhoz de Almeida, Rodrigo Estevam ^[5] ; Batista, Rafael Butke ^[1] ; Pellegrino Cerri, Carlos Eduardo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Ciencia Solo, Escola Agr Luiz de Queiroz, Piracicaba, SP - Brazil

^[2] Univ Fed Vicosa, Inst Ciencias Agr, Campus Florestal, LMG 818, Km 06, BR-35690000 Florestal, MG - Brazil

^[3] Inst Fed Piaui, Campus Sao Joao do Piaui, Sao Joao Do Piaui, PI - Brazil

^[4] Mohammed VI Polytech Univ UM6P, AgroBiosci Program, Ben Guerir - Morocco

^[5] Embrapa Pesca & Aquicultura, Palmas, TO - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CARBON MANAGEMENT; v. 12, n. 5 SEP 2021.
• Citações Web of Science: 0

Resumo

The reclamation of degraded pastures has a prominent role in the Brazilian climate policy and is one of the main strategies of Brazil's Low-Carbon Agriculture Plan (ABC Plan). Here, we aimed to evaluate the changes in soil C and N stocks in livestock areas under pasture reclamation and contribute to the empirical basis for evaluating the ABC Plan. Based on the assessment of six chronosequences across Brazilian Cerrado, we observed that the effects of management practices for pasture reclamation on soil C and N stocks in livestock areas were quite variable. Any general tendencies depend on the depth evaluated. At the 0-30 cm soil layer, pasture areas under reclamation in Brazilian Cerrado showed an average soil C change rate of 0.47 Mg C ha(-1 )yr(-1). However, for the more in-depth assessment (0-100 cm), the adoption of management practices for pasture reclamation did not affect the average rate of soil C changes for these areas. In this sense, we suggest that an up-scaling from single case studies may lead to overestimations of soil C inventories. Thefore, ABC Plan must review some of its approaches based on general values and extrapolations regarding C sequestration in pasture areas. (AU)

• Processo FAPESP: 14/21273-8 - Potencial de sequestro de carbono no solo e dinâmica da matéria orgânica em pastagens degradadas no Brasil
• Beneficiário: Daniele Costa de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 20/15230-5 - Centro de Pesquisa e Inovação de Gases de Efeito Estufa - RCG2I
• Beneficiário: Julio Romano Meneghini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Beneficiário: Julio Romano Meneghini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia