Digestibility, fermentation and rumen microbiota of crossbred heifers fed diets with different soybean oil availabilities in the rumen

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dc.contributor.authorFiorentini, G. [UNESP]
dc.contributor.authorMessana, J. D. [UNESP]
dc.contributor.authorDian, P. H M [UNESP]
dc.contributor.authorReis, R. A. [UNESP]
dc.contributor.authorCanesin, R. C. [UNESP]
dc.contributor.authorPires, A. V.
dc.contributor.authorBerchielli, Telma Teresinha [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal de Viçosa (UFV)
dc.date.accessioned2014-05-27T11:28:56Z
dc.date.available2014-05-27T11:28:56Z
dc.date.issued2013-04-19
dc.description.abstractThe goal of this study was to evaluate the effects of different soybean oil availabilities on the intake and partial and total digestibility of dry matter (DM) and nutrients, rumen fermentation parameters, efficiency of microbial synthesis, and the rumen microbiota of crossbred beef heifers. Nine crossbred heifers fitted with rumen and duodenal cannulae were evaluated in a triple 3 × 3 Latin square design with three treatments and three periods in three simultaneous repetitions. Heifers approximately 18 months old, with mean initial and final body weights of 316.3±28.8 and 362.6±34.4 kg, respectively, were fed a diet containing 600. g/kg of corn silage and 400. g/kg concentrate with a 58.0. g/kg fat content in the total diet. The sources of lipids included soybean grain, rumen-protected fat, and soybean oil. The statistical analyses were conducted using PROC MIXED from SAS, and the means were compared using Tukey's test (P<0.05). Dietary lipid sources did not affect nutrient intake (P>0.05). Except the apparent digestibility of organic matter (P=0.024), the apparent digestibility of the other nutrients did not differ among the treatment groups. Regarding body nitrogen retention, the soybean grain treatment was more effective than the rumen-protected fat treatment (P=0.045); however, the soybean oil treatment did not differ from the other two treatments. In relation to the efficiency of microbial protein synthesis (g. N/kg of organic matter apparently digested in the rumen corrected for microbial organic matter), the soybean oil and soybean grain treatments were more efficient than the rumen-protected fat treatment (P=0.001). Animals fed rumen-protected fat had larger numbers of protozoa (P<0.001) and fungi (P<0.001) than those supplemented with soybean grain and soybean oil. The dietary lipid sources did not affect pH, the molar concentration of propionate and total volatile fatty acids (P>0.05), whereas the concentrations of ammonia nitrogen and acetate were higher in animals fed with rumen-protected fat than in those submitted to the other treatments. The use of different soybean oil availabilities did not affect nutrient intake; however, treatments with soybean oil and soybean grain were more efficient regarding nutrient intake than rumen-protected fat because they reduced the numbers of fungi and protozoa and consequently improved the efficiency of microbial protein synthesis. © 2013 Elsevier B.V.en
dc.description.affiliationDepartment of Animal Science São Paulo State University (UNESP)/Campus Jaboticabal, Rod. Professor Paulo Donato Castellane, km 5, Rural, Jaboticabal, São Paulo CEP: 14884-900
dc.description.affiliationDepartment of Animal Science Superior School of Agriculture Luiz de Queiroz University of São Paulo (USP)/Piracicaba, São Paulo
dc.description.affiliationINCT/CA - UFV - Department of Animal Science, Av. Peter Henry Rolfs, S/n - Campus Universitário, Viçosa, Minas Gerais CEP: 36570-000
dc.description.affiliationUnespDepartment of Animal Science São Paulo State University (UNESP)/Campus Jaboticabal, Rod. Professor Paulo Donato Castellane, km 5, Rural, Jaboticabal, São Paulo CEP: 14884-900
dc.format.extent26-34
dc.identifierhttp://dx.doi.org/10.1016/j.anifeedsci.2013.01.011
dc.identifier.citationAnimal Feed Science and Technology, v. 181, n. 1-4, p. 26-34, 2013.
dc.identifier.doi10.1016/j.anifeedsci.2013.01.011
dc.identifier.issn0377-8401
dc.identifier.lattes8605438226392855
dc.identifier.lattes5317385915649516
dc.identifier.scopus2-s2.0-84876339699
dc.identifier.urihttp://hdl.handle.net/11449/75135
dc.identifier.wosWOS:000318261400003
dc.language.isoeng
dc.relation.ispartofAnimal Feed Science and Technology
dc.relation.ispartofjcr2.143
dc.relation.ispartofsjr0,937
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectBacteria
dc.subjectFungi
dc.subjectProtozoa
dc.subjectRumen-protected fat
dc.subjectSoybean grain
dc.subjectSoybean oil
dc.subjectAnimalia
dc.subjectBacteria (microorganisms)
dc.subjectGlycine max
dc.subjectZea mays
dc.titleDigestibility, fermentation and rumen microbiota of crossbred heifers fed diets with different soybean oil availabilities in the rumenen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.author.lattes8605438226392855
unesp.author.lattes5317385915649516
unesp.author.orcid0000-0002-8026-7324[7]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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