| Full text | |
| Author(s): |
Puga, Aline Peregrina
[1]
;
Grutzmacher, Priscila
[1]
;
Pellegrino Cerri, Carlos Eduardo
[2]
;
Ribeirinho, Victor Sanches
[1]
;
de Andrade, Cristiano Alberto
[1]
Total Authors: 5
|
| Affiliation: | [1] Embrapa Meio Ambiente, Rodovia SP 340, Km 127, 5, BR-13820000 Jaguariuna, SP - Brazil
[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Soil Sci, Piracicaba, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Science of The Total Environment; v. 704, FEB 20 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
The sustainable development of agriculture depends on increasing N use efficiency (NUE) and consequently reducing N losses from different sources, such as NH3 volatilization, NO3 leaching, and N2O emissions. While the chemical and physical properties of biochar (BC) in fertilizers have been evaluated to increase NUE, a lack of information exists regarding the effects of BC amendments in tropical soils. We performed a one-year field experiment with tropical soil to evaluate the effects of BC-based N fertilizers (BN) on maize yield and on greenhouse gas (GHG) emissions. The treatments consisted of five fertilizers: ammonium nitrate (AN), urea (U), BN51/10 (51% BC, 10% N), BN40/17 (40% BC, 17% N), BN29/20 (29% BC, 20% N), and a control (without N fertilizer). The N fertilizers (80 kg N ha(-1)) were broadcast 20 days after sowing. Yield, grain N uptake, NUE, ammonia volatilization, and GHG emissions were measured. The results demonstrated the potential of BNs to enhance the efficiency of the fertilizers. BN51/10 and BN40/17 had an average maize yield that was 26% higher than that of U, and BN51/10 resulted in a NUE that was 12% higher than what was observed for U. Both the effects on yield and NUE were attributed to lower N release rates of the BN-amended fertilizers compared to that of the conventional soluble N sources. The BC-based fertilizers presented better environmental performance, and BN51/10 showed the lowest emission intensity when C sequestration by BC was not considered, with a value that was 14% lower than that of the U treatment. When considering C sequestration by BC, the emission intensity of the C equivalents demonstrated that all BNs presented C sequestration that differed from that of the mineral N sources. BC-based nitrogen fertilizers may have promising applications for sustainable agricultural development by mitigating N losses and increasing C stocks. (C) 2019 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 15/21633-7 - Agronomic and environmental efficiency of biochar enriched or not with mineral source in the supply of nitrogen. |
| Grantee: | Aline Peregrina Puga |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 17/02886-7 - Carbon stability of biochar, aging process and fertilizer effect from formulations with mineral sources |
| Grantee: | Cristiano Alberto de Andrade |
| Support Opportunities: | Regular Research Grants |