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Nitrification inhibitor as strategy to mitigate N2O emissions in sugarcane production

Grant number: 17/02299-4
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): June 01, 2017
Effective date (End): December 31, 2020
Field of knowledge:Agronomical Sciences - Agronomy
Acordo de Cooperação: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Heitor Cantarella
Grantee:Bruna Gonçalves de Oliveira Carvalho
Host Institution: Instituto Agronômico (IAC). Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Campinas , SP, Brazil
Associated research grant:15/50305-8 - A virtual joint centre to deliver enhanced nitrogen use efficiency via an integrated soil-plant systems approach for the UK & Brazil, AP.TEM
Associated scholarship(s):19/12557-6 - Distinguishing microbial pathways to nitrous oxide emissions following addition of concentrated vinasse and the nitrification inhibitor DMPP to sugarcane soil, BE.EP.PD


Nitrous oxide (N2O) emissions from nitrogen fertilization has a great environmental impact on the production of ethanol from sugarcane. A strategy to reduce N2O emissions from N fertilizers is through the addition of nitrification inhibitors. However, little is known about the efficiency of the inhibitors to mitigate the emissions and to increase sugarcane yield, especially when is associated with the addition of organic residues, such as sugarcane straw and vinasse. The aim of this project is to evaluate the efficiency of the nitrification inhibitor in nitrogen fertilization associated with the addition of organic residues in N2O emissions and in sugarcane yields. Additionally, the project aims to identify the main process associated with N2O production. To achieve these aims will be carried out studies under field and laboratory conditions. The first study is composed by two field experiments that aims to isolate the effects of N fertilization with the addition of nitrification inhibitor (DMPP) and different amounts of straw. The experiment will set up at different times, early and late harvest period. These experiments will be installed in ratoon areas in early and late harvest period. The experimental design is a factorial 3 x 4, which N fertilizers treatments (control - 0 N; 120 kg N ha-1 e 120 kg N ha-1 + DMPP) and 4 rates of straw (0, 5, 10 e 15 Mg ha-1). The second experiment will be carried out under controlled laboratory conditions to test the effect of vinasse addition on the efficiency of nitrification inhibitor in reducing N2O emissions. And finally, the third study will be composed by two field experiments and one laboratory experiment, in which Urea (U), Ammonium Nitrate (AN), DMPP and concentrated vinasse will be tested. In the field experiments, the N2O fluxes will be evaluated with the use of static chambers, and soil analyzes will be carried out to evaluate soil pH, N content in the form of ammonium (NH4 +), nitrite (NO2-) and nitrate (NO3 -). The ammonia (N-NH3-) volatilization will be quantified. In both field experiments, the crop yield will be evaluated using an instrumented truck. In incubation study, isotopic techniques (15N) will be used to characterize the different processes of N2O formation. It is expected with this project the characterization of the N2O emission due to different situations of N fertilizers application and organic residues management in sugarcane cultivation and indicate ways to mitigate the GHG emissions. (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)
GONZAGA, LEANDRO CAROLINO; NUNES CARVALHO, JOAO LUIS; DE OLIVEIRA, BRUNA GONSALVES; SOARES, JOHNNY RODRIGUES; CANTARELLA, HEITOR. Crop residue removal and nitrification inhibitor application as strategies to mitigate N2O emissions in sugarcane fields. BIOMASS & BIOENERGY, v. 119, p. 206-216, . (17/02299-4, 14/26767-9)
CARVALHO, JOAO LUIS NUNES; OLIVEIRA, BRUNA GONCALVES; CANTARELLA, HEITOR; CHAGAS, MATHEUS FERREIRA; GONZAGA, LEANDRO CAROLINO; LOURENCO, KESIA SILVA; BORDONAL, RICARDO OLIVEIRA; BONOMI, ANTONIO. Implications of regional N2O-N emission factors on sugarcane ethanol emissions and granted decarbonization certificates. RENEWABLE & SUSTAINABLE ENERGY REVIEWS, v. 149, . (18/20698-6, 18/20793-9, 19/12557-6, 17/02299-4)

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