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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Decomposition of sugarcane straw: Basis for management decisions for bioenergy production

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Pimentel, Laisa G. [1] ; Cherubin, Mauricio R. [2] ; Oliveira, Dener M. S. [3] ; Cerri, Carlos E. P. [1] ; Cerri, Carlos C. [2]
Total Authors: 5
[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, 11 Padua Dias Ave, BR-13418900 Piracicaba, SP - Brazil
[2] Univ Sao Paulo, Ctr Nucl Energy Agr, 303 Centenario Ave, BR-13400970 Piracicaba, SP - Brazil
[3] Fed Inst Goiano, Campus Posse, Correntina St 824, BR-73900000 Posse, Go - Brazil
Total Affiliations: 3
Document type: Journal article
Source: BIOMASS & BIOENERGY; v. 122, p. 133-144, MAR 2019.
Web of Science Citations: 5

Straw dead stock is a key driver for crop residue management decisions regarding bioenergy production. Therefore, a field study was conducted to evaluate the sugarcane straw decomposition under different straw removal rates, characterize straw composition changes, and quantify the straw-derived C and N loss. Four sugarcane straw removal rates were evaluated: no removal (14.0 Mg ha(-1) of DM), 25 (10.5 Mg ha(-1) of DM), 50 (7.0 Mg ha(-1) of DM) and 75% (3.5 Mg ha(-1) of DM) of straw removal. Our results showed that straw removal rate had no effect on first year of straw deposition, but during the second year, the lowest decomposition was associated with higher straw removal rates. Dry mass loss was also approximately 25% higher in the second year than in the first. Furthermore, carbon and nitrogen loss were two- and threefold higher in the first year compared to the second year of deposition. Overall, cellulose and hemicellulose decreased by 13 and 7%, respectively, while lignin increased proportionally by 92% during the two year experiment. Our findings suggest that the most appropriate removal rate to maintain soil quality and meet the demands for energy production is 50% of the total straw deposited on the soil. (AU)

FAPESP's process: 15/00308-0 - Decomposition of different amounts of straw sugarcane deposited on the ground in the central South Region of Brazil
Grantee:Laisa Gouveia Pimentel
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 14/08632-9 - Soil organic matter in land use change areas under sugarcane cultivation in south central region of Brazil
Grantee:Dener Márcio da Silva Oliveira
Support type: Scholarships in Brazil - Doctorate