DMPP mitigates N2O emissions from nitrogen fertilizer applied with concentrated and standard vinasse

Author(s)

Lourenco, Kesia Silva ^[1] ; Cantarella, Heitor ^[1] ; Soares, Johnny Rodrigues ^[2] ; Gonzaga, Leandro Carolino ^[3] ; de Campos Menegale, Paula Leite ^[1]

Affiliation

^[1] Agron Inst Campinas IAC, Soils & Environm Resources Ctr, POB 28, BR-13012970 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Fac Agr Engn, UNICAMP, Av Candido Rondon 501, BR-13083875 Campinas, SP - Brazil

^[3] Natl Ctr Res Energy & Mat, Brazilian Biorenewables Natl Lab LNBR, Rua Giuseppe Maximo Scolfaro 10000, BR-13083970 Campinas, SP - Brazil

• Document type: Journal article
• Source: Geoderma; v. 404, DEC 15 2021.
• Web of Science Citations: 2

Abstract

The application of vinasse, an organic byproduct of ethanol production, can enhance greenhouse gas emissions from N fertilizers, especially nitrous oxide (N2O). The objective of this work was to test the efficiency of the nitrification inhibitor (NI) 3,4 dimethylpyrazole phosphate (DMPP) in reducing N2O emissions from urea (UR) and ammonium nitrate (AN) applied with or without standard (V) or concentrated vinasse (CV). Two laboratory studies were conducted with repacked soil columns from a sugarcane field. Based on usual field rates, UR and AN were added at a rate equivalent to 100 kg N ha(-1), V was added at 100 m(3) ha(-1) (51 kg N ha(-1)), and CV was added at 20 m(3) ha(-1) (Exp. 1: 35 kg N ha(-1) and Exp. 2: 56 kg N ha(-1)). N2O emissions were measured for 75 and 61 days after the input of fertilizers and vinasses. When mineral fertilizers were compared, the N2O-N emission factors (EFs) were: 0.08% (AN) and 1.44% (UR). Combined with N fertilizers, vinasses (CV and V) greatly enhanced the N2O emissions from soil (ranging from 0.76% to 1.5% in one study and 1.37% to 6.27% in the other). In addition, CV + N fertilizer emitted more N2O than V + N fertilizer or N fertilizer alone. However, NI reduced N2O emissions by 80% on average for vinasses (CV and V) plus N fertilizer (AN and UR) and UR alone, but not for AN alone. Since both vinasses and mineral N fertilizers are standard inputs for sugarcane production and high N2O emissions are observed when they are applied in the same area, NI should be considered for mitigation of soil N2O emissions from sugarcane used for bioenergy. (AU)

• FAPESP's process: 13/50365-5 - Microbial networks in control of greenhouse gases emissions in biobased agriculture - MiniBag
• Grantee: Heitor Cantarella
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
• FAPESP's process: 18/20698-6 - Nitrification inhibitor as strategy to mitigate N2O emissions and its impacts on the active nitrifying and denitrifying soil microbial communities after concentrated vinasse and mineral N application
• Grantee: Késia Silva Lourenço
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/20793-9 - Nitrification and urease inhibitors as strategies to mitigate N2O emissions and NH3 volatilization in sugarcane production with addition of organic residues
• Grantee: Heitor Cantarella
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
• FAPESP's process: 13/12716-0 - GREENHOUSE GAS FLOWS (CO2, N2O AND CH4) FROM SOIL WITH SUGARCANE AS AFFECTED BY REGULAR OR CONCENTRATE VINASSE AT DIFFERENT APPLICATION TIMES.
• Grantee: Késia Silva Lourenço
• Support Opportunities: Scholarships in Brazil - Doctorate