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Decomposition and nutrient release from sugarcane straw in central-southern Brazil

Grant number: 16/08214-8
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): July 01, 2016
Effective date (End): February 28, 2018
Field of knowledge:Agronomical Sciences - Agronomy - Soil Science
Principal Investigator:Carlos Eduardo Pellegrino Cerri
Grantee:Letícia Leal Varanda
Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil


Sugarcane straw, before a problem for the mills, currently receives great prominence for its multi-purpose, being on the ground, with positive agronomic impacts, or in the industry, used for energy cogeneration or 2G ethanol. Considered the impacts on the ground, the objective of this research is to evaluate the rate of decomposition and release of nutrients from different sugarcane straw doses in center-southern Brazil. Additionally, it is intend to quantify the plant-soil nutrients transfer and estimate the nutritional export of straw removal from the soil. The study will be conduct in São Paulo, Goiás, Mato Grosso do Sul and Paraná states, using a randomized block design with destructive samples over time. Decomposed straw samples will be collect with 30, 120, 240 and 360 days, and soil samples from depths 0-2.5, 2.5-5, 5-10 cm, to evaluate the nutritional soil-plant transfer, and biochemistry and elementary straw characterization will be perform during installation and end of the experiment. The straw will come from RB867515 variety and 12 t ha-1 MS dose was defined as 100% of the remaining straw on the soil after crop harvest, and the remaining doses are 50, 25 and 0% straw starting from the initial dose. The data will be subject to analysis of variance (ANOVA) and average will be evaluate using multiple comparison test of Tukey (p <0.05). With results is expect to determine the straw decomposition rate and its correlation with edaphoclimatic factors of the study regions, allowing to estimate an optimal dose to be left on the soil, as well as nutritional export from straw. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CHERUBIN, MAURICIO ROBERTO; DA SILVA OLIVEIRA, DENER MARCIO; FEIGL, BRIGITTE JOSEFINE; PIMENTEL, LAISA GOUVEIA; LISBOA, IZAIAS PINHEIRO; GMACH, MARIA REGINA; VARANDA, LETICIA LEAL; MORAIS, MARISTELA CALVENTE; SATIRO, LUCAS SANTOS; POPIN, GUSTAVO VICENTINI; et al. Crop residue harvest for bioenergy production and its implications on soil functioning and plant growth: A review. Scientia Agricola, v. 75, n. 3, p. 255-272, . (15/00308-0, 15/14122-6, 16/08214-8, 14/08632-9)
VARANDA, LETICIA L.; CHERUBIN, MAURICIO R.; CERRI, CARLOS E. P.. Decomposition dynamics altered by straw removal management in the sugarcane-expansion regions in Brazil. SOIL RESEARCH, v. 57, n. 1, p. 41-52, . (16/08214-8)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
VARANDA, Letícia Leal. Sugarcane straw decomposition in the expansion region of cultivation in Brazil. 2018. Master's Dissertation - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) Piracicaba.

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