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Sugarcane nitrogen fertilization management at variable rates supported by ground optical sensors

Grant number: 11/08882-7
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): August 01, 2011
Effective date (End): January 31, 2014
Field of knowledge:Agronomical Sciences - Agronomy - Crop Science
Principal Investigator:José Paulo Molin
Grantee:Lucas Rios do Amaral
Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Associated research grant:06/04008-2 - GNSS: investigations and applications in geodetic positioning, in studies related to the atmosphere and precision agriculture, AP.TEM
Associated scholarship(s):12/03897-9 - Ground-based canopy reflectance sensor data analysis and processing for determining a methodology for nitrogen fertilization in sugarcane crop, BE.EP.DR


Globally there is a great demand for alternative sources of energy, propitiating an intense expansion to the Brazilian sugarcane sector that becomes avid for more technologies to maximize the sugarcane production and increase the economical return. Precision agriculture emerges as an important tool to use, among other equipments, sensors that enable fertilization in variable rates and real time. For this reason, it is proposed this research project in order to validate the nitrogen fertilization management at variable rates with the support of ground active optical sensors on the sugarcane crop. To reach this goal, will be installed greenhouse experiments to understand potential factors affecting the measurements with optical sensors, as well as determining the spectral curve of sugarcane; field experiments in the form of plots to identify the crop response to nitrogen rates from optical sensors, as the determination of the spectral response of the crop and study of different vegetation index; field experiments in the form of culture strips to test a strategy recommendation for nitrogen at variable rates; and total area experiments to evaluate the technique of nitrogen recommendation supported by optical sensors according the use of inputs and changes in productivity. (AU)

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Scientific publications (4)
(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)
DO AMARAL, LUCAS RIOS; MOLIN, JOSE PAULO. The Effectiveness of Three Vegetation Indices Obtained from a Canopy Sensor in Identifying Sugarcane Response to Nitrogen. AGRONOMY JOURNAL, v. 106, n. 1, p. 273-280, . (11/08882-7, 09/03372-0)
AMARAL, LUCAS R.; TREVISAN, RODRIGO G.; MOLIN, JOSE P.. Canopy sensor placement for variable-rate nitrogen application in sugarcane fields. PRECISION AGRICULTURE, v. 19, n. 1, p. 147-160, . (11/08882-7, 09/03372-0)
DA ROCHA, MURILLO GRESPAN; MARTINS DE BARRON, FLAVIO MARGARITO; DE MEDEIROS OLIVEIRA, STANLEY ROBSON; DO AMARAL, LUCAS RIOS. Biometric characteristics and canopy reflectance association for early-stage sugarcane biomass prediction. Scientia Agricola, v. 76, n. 4, p. 274-280, . (11/08882-7)
AMARAL, LUCAS R.; MOLIN, JOSE P.; SCHEPERS, JAMES S.. Algorithm for Variable-Rate Nitrogen Application in Sugarcane Based on Active Crop Canopy Sensor. AGRONOMY JOURNAL, v. 107, n. 4, p. 1513-1523, . (12/03897-9, 11/08882-7, 09/03372-0)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
AMARAL, Lucas Rios do. Crop canopy reflectance sensor for guiding the variable-rate nitrogen application in sugarcane. 2014. Doctoral Thesis - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) Piracicaba.

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