Data/hora: 25/05/2024 05:57:36

Biblioteca(s): 	Embrapa Meio Ambiente.	
Data corrente: 	03/12/2019	
Data da última atualização: 	12/04/2021	
Autoria: 	PUGA, A. P.; GRUTZMACHER, P.; CERRI, C. E. P.; RIBEIRINHO, V. S.; ANDRADE, C. A. de.	
Afiliação: 	ALINE PEREGRINA PUGA, FAPESP; PRISCILA GRUTZMACHER; CARLOS EDUARDO PELLEGRINO CERRI, ESALQ-USP; VICTOR SANCHES RIBEIRINHO; CRISTIANO ALBERTO DE ANDRADE, CNPMA.	
Título: 	Biochar-based nitrogen fertilizers: greenhouse gas emissions, use efficiency, and maize yield in tropical soils.	
Ano de publicação: 	2019	
Fonte/Imprenta: 	Science of The Total Environment, v. 704, article 135375, 2019.	
ISSN: 	0048-9697	
DOI: 	https://doi.org/10.1016/j.scitotenv.2019.135375	
Idioma: 	Inglês	
Conteúdo: 	Abstract: The sustainable development of agriculture depends on increasing N use efficiency (NUE) and 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 BCbased 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.	
Palavras-Chave: 	Biocarvão; CH4 emission; Increased efficiency; N loss; N2O emission.	
Thesagro: 	Amônia; Fertilizante; Nitrogênio.	
Thesaurus Nal: 	Ammonia; Biochar; Greenhouse gases; Methane; Nitrous oxide.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (16553-1) - UPC - AP - DD -  -  -  - DIS