| Full text | |
| Author(s): |
Gonzaga, Leandro Carolino
[1, 2]
;
Nunes Carvalho, Joao Luis
[1]
;
de Oliveira, Bruna Gonsalves
[2]
;
Soares, Johnny Rodrigues
[3]
;
Cantarella, Heitor
[2]
Total Authors: 5
|
| Affiliation: | [1] Natl Ctr Res Energy & Mat, Brazilian Bioethanol Sci & Technol Lab CTBE, Rua Giuseppe Maximo Scolfaro 10000, BR-13083970 Campinas, SP - Brazil
[2] IAC, Soils & Environm Resources Ctr, Av Barao Itapura 1481, BR-13020902 Campinas, SP - Brazil
[3] Univ Estadual Campinas, Sch Agr Engn, Av Candido Rondon 501, BR-13083875 Campinas, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | BIOMASS & BIOENERGY; v. 119, p. 206-216, DEC 2018. |
| Web of Science Citations: | 7 |
| Abstract | |
Nitrous oxide (N2O) emission estimates are important to ascertain the greenhouse gas balance of ethanol produced from sugarcane. We quantified N2O emissions in the presence of sugarcane crop residues, N fertilizer (ammonium sulfate), and a nitrification inhibitor (NI, dicyandiamide). Two field experiments were conducted to evaluate the implications of N fertilizer application during dry and wet seasons at two locations in southeast Brazil. Treatments consisted of four levels of crop residue (0, 5, 10, and 15 Mg ha(-1)) and three of N fertilizer (0 and 120 kg ha(-1) and 120 kg ha(-1) plus NI). N2O emission was measured using the closed chamber method and sugarcane yield via mechanical harvest. N2O emissions were higher in wet than in dry seasons following N fertilizer application, albeit affected by crop residue and NI in both. Retaining crop residues on the soil increased N2O emission and sugarcane yield. The N2O emission factor from N fertilizer ranged from 0.12% to 1.44% of N applied. NI reduced N2O emissions (by 87% and 63% in dry and wet seasons, respectively). Sugarcane yield varied from 42 to 92 Mg ha(-1) of fresh matter stalk and emission intensity from 3.7 to 22.9 kg of CO2eq, Mg of stalk(-1). The lowest greenhouse gas intensity was recorded with 5 Mg ha(-1) crop residue and 120 kg ha(-1) N supplemented with NI. Therefore, partial crop residue removal and NI addition to N fertilizer may be effective strategies to improve the sustainability index of biofuel from sugarcane and reduce N2O emissions and intensity. (AU) | |
| FAPESP's process: | 17/02299-4 - Nitrification inhibitor as strategy to mitigate N2O emissions in sugarcane production |
| Grantee: | Bruna Gonçalves de Oliveira Carvalho |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 14/26767-9 - Global Sustainable Bioenergy Initiative: Geospatial & environmental analysis of pastureland intensification for bioenergy |
| Grantee: | John Joseph Sheehan |
| Support Opportunities: | Research Projects - SPEC Program |