Can ammonium nitrate be a strategic tool by replacing urea as a nitrogen supplementation source to beef cattle in intensified grazing systems?

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dc.contributorWILLIAN 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.
dc.creatorANDRADE, W. R.
dc.creatorBERTOLONI, A. V.
dc.creatorPERNA JUNIOR, F.
dc.creatorFURTADO, A. J.
dc.creatorLELIS, A. L. J.
dc.creatorTRETTEL, M.
dc.creatorBERNDT, A.
dc.creatorOLIVEIRA, P. P. A.
dc.creatorPEREIRA, A. S. C.
dc.creatorRODRIGUES, P. H. M.
dc.date2025-05-20T19:48:07Z
dc.date2025-05-20T19:48:07Z
dc.date2025-05-20
dc.date2025
dc.date.accessioned2026-07-07T05:34:37Z
dc.descriptionAbstract: 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.
dc.identifierFermentation, v. 11, n. 5, 261, 2025.
dc.identifier2311-5637
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1175802
dc.identifierhttps://doi.org/10.3390/fermentation11050261
dc.identifier.urihttp://hdl.handle.net/123456789/495532
dc.languageeng
dc.rightsopenAccess
dc.subjectSistema de Pastejo
dc.subjectGado de Corte
dc.subjectNitrato de Amônio
dc.subjectSuplemento Alimentar
dc.subjectBeef cattle
dc.subjectGrazing
dc.subjectNonprotein nitrogen
dc.subjectRotational grazing
dc.titleCan ammonium nitrate be a strategic tool by replacing urea as a nitrogen supplementation source to beef cattle in intensified grazing systems?
dc.typeArtigo de periódico

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