Reducing greenhouse gas emissions via harvest residue management in eucalyptus afforestation on Brazilian sandy soils
Annual N<sub>2</sub>O emissions were low (0.11-0.23 kg N-N<sub>2</sub>O ha<sup>-1</sup> year<sup>-1</sup>) and showed no clear relationship with the amount of nitrogen added through residues. The soil consistently functioned as a methane sink across all management systems, with CH<sub>4</sub> fluxes ranging from -2.56 to -3.91 kg C-CH<sub>4</sub> ha<sup>-1</sup> year<sup>-1</sup>. The highest rate of C-CO<sub>2</sub> retention in soil (-5,540 kg C-CO<sub>2</sub> ha<sup>-1</sup> year<sup>-1</sup>) was observed under the AR management system, while the lowest (-1,752 kg C-CO<sub>2</sub> ha<sup>-1</sup> year<sup>-1</sup>) occurred under the NRs system. AR management also resulted in the lowest global warming potential (-33,946 kg C-CO<sub>2</sub> ha<sup>-1</sup> year<sup>-1</sup>), primarily due to soil C-CO<sub>2</sub> retention (15.43%) and carbon accumulation in biomass and wood products (84.57%). These findings demonstrate that retaining eucalyptus harvest residues in subtropical sandy soils, in conjunction with carbon sequestration in wood products, constitutes an effective forest management strategy for mitigating global warming.
Authors
- Eduardo Carniel (ORCID: https://orcid.org/0000-0001-6673-0127)
- Elias Frank de Araújo (ORCID: https://orcid.org/0000-0002-7635-5305)
- Frederico Costa Beber Vieira (ORCID: https://orcid.org/0000-0001-5565-7593)
- Angélica Bender (ORCID: https://orcid.org/0000-0002-1141-6090)
- Bruno Brito Lisboa (ORCID: https://orcid.org/0000-0003-3258-2300)
- Josiléia Acordi Zanatta (ORCID: https://orcid.org/0000-0002-3214-4864)
- Jean Martins (ORCID: https://orcid.org/0000-0003-0314-1311)
- Luciano Kayser Vargas (ORCID: https://orcid.org/0000-0002-1721-1061)
- Jackson Freitas Brilhante de São José (ORCID: https://orcid.org/0000-0002-4637-0299)
- Cimélio Bayer (ORCID: https://orcid.org/0000-0001-8553-7330)
Institutions
- Brazilian Institute of Environment and Renewable Natural Resources (BR)
- Universidade Federal do Rio Grande do Sul (BR)
- Brazilian Agricultural Research Corporation (BR)
- Companhia Brasileira de Aluminio (BR)
- Governo do Estado do Rio Grande do Sul (BR)
- Universidade Federal do Pampa (BR)
Publication Details
- Journal
- Frontiers in Plant Science
- Published
- 2025-08-11
- DOI
- https://doi.org/10.3389/fpls.2025.1633436
- Primary Topic
- Soil Carbon and Nitrogen Dynamics
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Research Centre for Gas Innovation
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul
- Universidade de São Paulo
- Shell Brasil