Título:	Can ammonium nitrate be a strategic tool by replacing urea as a nitrogen supplementation source to beef cattle in intensified grazing systems?
Autoria:	ANDRADE, W. R. BERTOLONI, A. V. PERNA JUNIOR, F. FURTADO, A. J. LELIS, A. L. J. TRETTEL, M. BERNDT, A. OLIVEIRA, P. P. A. PEREIRA, A. S. C. RODRIGUES, P. H. M.
Afiliação:	WILLIAN RUFINO ANDRADE, UNIVERSIDADE DE SÃO PAULO; ANALISA VASQUES BERTOLONI, UNIVERSIDADE DE SÃO PAULO; FLAVIO PERNA JUNIOR, UNIVERSIDADE DE SÃO PAULO; ALTHIERES JOSÉ FURTADO, UNIVERSIDADE DE SÃO PAULO; ANA LAURA JANUÁRIO LELIS, UNIVERSIDADE DE SÃO PAULO; MURILO TRETTEL, UNIVERSIDADE DE SÃO PAULO; ALEXANDRE BERNDT, CPPSE; PATRICIA PERONDI ANCHAO OLIVEIRA, CPPSE; ANGÉLICA SIMONE CRAVO PEREIRA, UNIVERSIDADE DE SÃO PAULO; PAULO HENRIQUE MAZZA RODRIGUES, UNIVERSIDADE DE SÃO PAULO.
Ano de publicação:	2025
Referência:	Fermentation, v. 11, n. 5, 261, 2025.
Conteúdo:	Abstract: For cattle raised on tropical grass pastures, it is essential to explore strategies that circumvent climatic seasonality that affect forage availability and quality. We hypothesize that the intensification of grazing systems, with rotational and deferred methods, combined with ammonium nitrate or urea supplementation, are excellent strategies to increase ruminal efficiency and animal productivity. For this purpose, 8 cattle with cannulas were distributed in rotational and deferred grazing systems, supplemented with urea or ammonium nitrate, and evaluated throughout the four seasons of the year over a period of two years. Dry matter intake and digestibility were measured using indigestible neutral detergent fiber, titanium dioxide and chromium oxide markers. Ruminal kinetics and degradability of DM and nutrients were measured using the nylon bag technique. Urine parameters were used to estimate microbial nitrogen compounds synthesis and efficiency of microbial protein synthesis. The rotational grazing improves NPN intake, NDF and ADF digestibility, and gross energy. Ammonium nitrate supplementation showed improved efficiency in microbial protein synthesis without negatively affecting feed intake, positioning it as a valuable nitrogen source for grazing cattle.
Thesagro:	Sistema de Pastejo Gado de Corte Nitrato de Amônio Suplemento Alimentar
NAL Thesaurus:	Beef cattle Grazing Nonprotein nitrogen Rotational grazing
ISSN:	2311-5637
Digital Object Identifier:	https://doi.org/10.3390/fermentation11050261
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPPSE)