Effects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pasture

dc.contributor.authorValencia, E. Diana Marcela
dc.contributor.authorGiraldo, Luis Alfonso
dc.contributor.authorMarín, Alejandra
dc.contributor.authorGranja-Salcedo, Yury Tatiana [UNESP]
dc.contributor.authorBerchielli, Telma Teresinha [UNESP]
dc.contributor.institutionCorregimiento San José del Nus
dc.contributor.institutionFacultad de Ciencias Agrarias
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-29T08:35:43Z
dc.date.available2022-04-29T08:35:43Z
dc.date.issued2021-12-01
dc.description.abstractThe aim of this study was to determine the effects of different amounts of crude glycerol (CGL) on dry matter intake, milk yield, milk protein yield, and milk fatty acid profile of dairy cows grazing on a Kikuyu-based pasture. Six Holstein cows were used in the first third of lactation (mean ± SD 559 ± 22.5 kg body weight, 43 ± 10 days in milk, and 26.8 ± 1.2 kg milk/day) and were randomized within a replicated 3 × 3 Latin square arrangement. Animals grazed the Kikuyu grass and were supplemented with a commercial energy-protein concentrate at 1.0 kg/4.0 kg of milk. The experimental period was 69 days. The following treatments were administered: CGL0 (control, without glycerol), CGL1 (750 g/cow/day), and CGL2 (1,500 g/cow/day). The addition of 750 and 1,500 g of CGL did not affect grass and concentrate intake (P > 0.05). However, milk yield (FCM 3.5%) increased by 14.2% in the CGL2 group compared to that obtained in the control group (CGL0) (P = 0.02). The addition of 1,500 g of CGL to the diet resulted in a 2.1% greater yield of milk protein compared to that obtained with CGL0 treatment (P = 0.01). Further, the addition of 1,500 g of CGL did not impact grass intake, milk fat concentration, or fatty acid composition (P < 0.05). Thus, the inclusion of CGL as a co-product may be a nutritional strategy to increase the productivity of dairy production systems in tropical perennials, such as Kikuyu grass.en
dc.description.affiliationCorporación Colombiana de Investigación Agropecuaria-AGROSAVIA Centro de Investigación el Nus Corregimiento San José del Nus, Antioquia
dc.description.affiliationUniversidad Nacional de Colombia Sede Medellín Facultad de Ciencias Agrarias Departamento de Producción Animal, Antioquia
dc.description.affiliationUniversidade Estadual Paulista Júlio de Mesquita Filho Faculdade de Ciências Agrarias e Veterinárias Departamento de Zootecnia, São Paulo
dc.description.affiliationUnespUniversidade Estadual Paulista Júlio de Mesquita Filho Faculdade de Ciências Agrarias e Veterinárias Departamento de Zootecnia, São Paulo
dc.format.extent491-497
dc.identifierhttp://dx.doi.org/10.17268/sci.agropecu.2021.053
dc.identifier.citationScientia Agropecuaria, v. 12, n. 4, p. 491-497, 2021.
dc.identifier.doi10.17268/sci.agropecu.2021.053
dc.identifier.issn2306-6741
dc.identifier.issn2077-9917
dc.identifier.scopus2-s2.0-85117795376
dc.identifier.urihttp://hdl.handle.net/11449/229775
dc.language.isoeng
dc.relation.ispartofScientia Agropecuaria
dc.sourceScopus
dc.subjectBiofuel
dc.subjectEnergy by-product
dc.subjectEnergy feedstuff
dc.subjectLactation performance
dc.subjectMilk composition
dc.subjectTropical pasture
dc.titleEffects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pastureen
dc.typeArtigo
unesp.author.orcid0000-0001-8321-1353 0000-0001-8321-1353[1]
unesp.author.orcid0000-0002-9279-1465[2]
unesp.author.orcid0000-0002-1083-6405[3]
unesp.author.orcid0000-0003-4783-999X 0000-0003-4783-999X[4]
unesp.author.orcid0000-0002-8026-7324[5]
unesp.departmentZootecnia - FCAVpt

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