Nitrogen compounds balance and microbial protein synthesis in supplemented crossbred dairy cows in pasture

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dc.creatorGabriela Santistevan Gutierrez
dc.creatorRogério de Paula Lana
dc.creatorCesar Roberto Viana Teixeira
dc.creatorLuciana Navajas Rennó
dc.creatorCristina Mattos Veloso
dc.date2018
dc.date.accessioned2026-07-07T04:00:19Z
dc.descriptionThe objective this work was to evaluate the supplementation of cows on Brachiaria decumbens pasture during the rainy-dry transition. Eight 1/2 Holstein/Zebu cows (497 ± 50 kg) were distributed in two 4 x 4 Latin squares, with 2 x 2 factorial treatments (100% mineral salt versus nitrogen salt containing 25:25:50% urea: corn: mineral salt, and 1.5 versus 3.0 kg d-1 concentrate per cow). The experiment lasted 56 days, divided into four periods of 14 days, the last seven days for data collection. No interaction effect (p > 0.05) was detected between the supplement and the different levels of concentrate for any of the evaluated variables. No effect (p > 0.05) of supplement or concentrate level was observed on urinary excretions of purine derivatives, microbial nitrogen compounds and microbial efficiency. Nitrogen salt increased (p < 0.05) nitrogen intake and increased urinary nitrogen excretion, leading to a reduced nitrogen balance, while the higher concentrate level increased (p < 0.05) nitrogen intake and the total amount of nitrogen excreted in milk. Therefore, it is recommended, for crossbred cows in the rainy-dry transition period, the supply of 1.5 kg d-1 concentrate during milking, using only mineral salt instead of nitrogen salt at will on pasture.
dc.formatapplication/pdf
dc.identifier1806-2636
dc.identifierhttps://www.redalyc.org/articulo.oa?id=303158407044
dc.identifierhttps://www.redalyc.org/journal/3031/303158407044/
dc.identifierhttps://www.redalyc.org/journal/3031/303158407044/html/
dc.identifierhttps://www.redalyc.org/journal/3031/303158407044/303158407044.epub
dc.identifierhttps://www.redalyc.org/journal/3031/303158407044/movil
dc.identifier10.4025/actascianimsci.v40i1.42556
dc.identifier.urihttp://hdl.handle.net/123456789/450326
dc.languageen
dc.publisherUniversidade Estadual de Maringá
dc.relationhttp://www.redalyc.org/revista.oa?id=3031
dc.rightsActa Scientiarum. Animal Sciences
dc.sourceActa Scientiarum. Animal Sciences (Brasil) Vol.40
dc.subjectAgrociencias
dc.titleNitrogen compounds balance and microbial protein synthesis in supplemented crossbred dairy cows in pasture
dc.typeartículo científico

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Acta Scientiarum. Animal Sciences - Universidade Estadual de Maringá