Title:	Nitrous oxide emissions and ammonia volatilization from pasture after cattle dung and urine applications in the dry and rainy seasons of the brazilian cerrado.
Authors:	RAMOS, M. L. G. COSTA, A. R. da MADARI, B. E. CARVALHO, G. D. PEREIRA, A. C. de C. CORRÊA, R. S. SOUSA, T. R. de CARVALHO, A. M. de
Affiliation:	MARIA LUCRECIA GEROSA RAMOS, UNIVERSIDADE DE BRASÍLIA; ADRIANA RODOLFO DA COSTA, UNIVERSIDADE ESTADUAL DE GOIÁS; BEATA EMOKE MADARI, CNPAF; GLAUCILENE DUARTE CARVALHO, SECRETARIA GERAL DE GOVERNO DO ESTADO DE GOIÁS; ANA CLAUDIA DE CASTRO PEREIRA, CENTRO UNIVERSITÁRIO DE GOIÁS; RUBIA SANTOS CORRÊA, PALÁCIO PEDRO LUDOVICO TEIXEIRA; THAIS RODRIGUES DE SOUSA, UNIVERSIDADE DE BRASÍLIA; ARMINDA MOREIRA DE CARVALHO, CPAC.
Date Issued:	2024
Citation:	Agronomy, v. 14, 1257, June 2024.
Description:	An important source of greenhouse gases in Brazil is the nitrous oxide (N2O) emission from pasture, and microorganisms play an important role in nitrogen transformations in the soil. This study aimed to evaluate N2O emission and NH3 volatilization from bovine excreta in pasture in an integrated crop–livestock system (ICL) in the Brazilian Cerrado. Three treatments (urine, dung and control) were performed in two pastures (Area 1—three-year pasture of Urochloa ruziziensis and Area 2—one-year pasture of Urochloa brizantha cv. Piatã), with two application times of the excreta (dry and rainy season), during two successive years of application. Compared to the control, the excreta deposition on ICL increased soil N2O and NH3 fluxes. In the dry season, N2O fluxes were associated with higher ammonium (NH4+) availability. In the rainy season, these fluxes were related to NO3− availability and water-filled pore space (WFPS). In both areas, NH3 volatilization was higher after urine than dung application, especially in the dry season. The highest N2O emission factors were obtained for urine (0.32%), the rainy season (0.36%), and older pasture (Area 1: 0.24%). All these values were below the mean IPCC default values (0.77%). These results indicate that N2O emissions in pasture should be evaluated in regional conditions.
Thesagro:	Cerrado Oxido Amônia Esterco de Gado Urina Manejo do Solo Nitrato Pastagem
NAL Thesaurus:	Nitrous oxide Ammonia Pastures Cattle manure Soil management Nitrates
Keywords:	Óxido nitroso
ISSN:	2073-4395
DOI:	https://doi.org/10.3390/agronomy14061257
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPAF)