Metabolic Profile of F1 Holstein × Zebu Lactating Dairy Cows Under Grazing Supplemented with Two Non-Protein Nitrogen Sources

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dc.audienceInvestigador
dc.coverageColombia
dc.creatorMora Luna, Robert Emilio
dc.creatorHerrera Angulo, Ana María
dc.creatorEslava Tovar, José Fernando
dc.creatorIsea Chávez, Juan Carlos
dc.creatorEnrique Darghan, Aquiles
dc.date2024-02-01T14:57:59Z
dc.date2024-02-01T14:57:59Z
dc.date2023-10-23
dc.date2023
dc.date.accessioned2026-06-27T04:42:15Z
dc.descriptionPastures dedicated to cattle production in Venezuela have a low crude protein concentration. One of the nutritional strategies to correct the forage protein deficit is using non-protein nitrogen in the diet. To evaluate the effect of two non-protein nitrogen sources on the metabolic profile of lactating dairy cows, 31 F1 Holstein × Zebu multiparous cows averaging 419 ± 46 kg body weight and 17.1 ± 3.3 kg milk·animal·d-1 were randomly assigned to two treatments for 91 days: 1)59 g·animal-1·d-1 of urea and 2) 64 g·animal-1·d-1 of Optigen II® as slow-release urea (SRU). The animals were grazing (2.12 AU·ha-1) on Urochloa decumbens, U. humidicola, and U. brizantha (7.98-9.61 % CP) and supplied with 4 kg·animal·d-1 of concentrate (15 % CP), and 108, 60, and 108 g·animal·d-1 of mineral, molasses, and bypass fat, respectively. Glucose, total protein, albumin, cholesterol, urea, and β-hydroxybutyrate concentrations, aspartate aminotransferase, and gamma-glutamyl transferase activities were determined in blood serum samples every 28 days. ANOVA analyzed data in a completely randomized design with repeated measures. There were no differences among treatments in the parameters investigated; however, collecting time influenced all of them. No treatment × time interactions were found except for albumin concentration, higher in urea at day 0. The results indicate that under the conditions assayed in the present work, Optigen II® offers no advantage over urea concerning blood indicators of energy and protein metabolism and hepatic functionalityin dairy cows.
dc.descriptionGanadería bovina
dc.formatapplication/pdf
dc.formatapplication/pdf
dc.identifier2500-5308
dc.identifierhttp://hdl.handle.net/20.500.12324/38858
dc.identifierhttps://doi.org/10.21930/rcta.vol24_num3_art:2858
dc.identifierreponame:Biblioteca Digital Agropecuaria de Colombia
dc.identifierinstname:Corporación colombiana de investigación agropecuaria AGROSAVIA
dc.identifier.urihttp://hdl.handle.net/123456789/35929
dc.languagespa
dc.publisherCorporación colombiana de investigación agropecuaria - AGROSAVIA
dc.relationCiencia y Tecnología Agropecuaria
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dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.sourceCiencia y Tecnología Agropecuaria; Vol 24, Núm.3 (2023): Ciencia y Tecnología Agropecuaria; p. 1-14.
dc.subjectAlimentación animal - L02
dc.subjectGanado bovino
dc.subjectAlimentación de los animales
dc.subjectSuplementos
dc.subjectSuero sanguíneo
dc.subjectGanadería y especies menores
dc.subjecthttp://aims.fao.org/aos/agrovoc/c_1391
dc.subjecthttp://aims.fao.org/aos/agrovoc/c_429
dc.subjecthttp://aims.fao.org/aos/agrovoc/c_33996
dc.subjecthttp://aims.fao.org/aos/agrovoc/c_9323
dc.thumbnailhttps://repository.agrosavia.co/bitstreams/281120b2-5043-4a52-bb70-d90dcb650498/download
dc.titleMetabolic Profile of F1 Holstein × Zebu Lactating Dairy Cows Under Grazing Supplemented with Two Non-Protein Nitrogen Sources
dc.titlePerfil metabólico de vacas lactantes F1 Holstein × Cebú a pastoreo suplementadas con dos fuentes de nitrógeno no proteico
dc.typeArtículo científico

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