Quality of the forage apparently consumed by beef calves in natural grassland under fertilization and oversown with cool season forage species

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dc.contributor.authorElejalde, Denise Adelaide Gomes
dc.contributor.authorNabinger, Carlos
dc.contributor.authorPascual, Mónica Graciela Cadenazzi
dc.contributor.authorFerreira, Eduardo Tonet
dc.contributor.authorMissio, Regis Luis [UNESP]
dc.contributor.authorKunrath, Taise Robinson
dc.contributor.authorDevincenzi, Thais
dc.contributor.authorCardoso, Raquel Rolim
dc.contributor.institutionUniversidade Federal do Rio Grande do Sul (UFRGS)
dc.contributor.institutionUniversidad de La República Del Uruguay
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:18:23Z
dc.date.available2014-05-20T15:18:23Z
dc.date.issued2012-06-01
dc.description.abstractThe objective of this study was to evaluate the chemical composition of the forage apparently consumed by steers in a natural grassland on region of Campanha, in Rio Grande do Sul, Brazil, subjected or not to different inputs: NP - natural pasture without inputs; FNP - fertilized natural pasture and INP - improved natural grassland with fertilization and over-seeded with cultivated winter species. Three Angus steers testers and a variable number of regulator animals per experimental unit were utilized in order to maintain 13 kg of DM/100 kg of live weight (LW) as forage allowance. One time at each season, hand plucking samples were performed along the daily grazing time simulating forage harvested by the animals. The collected samples after drying and grind were submitted to chemical analysis to determine the forage quality. Except in winter and spring, the values of neutral detergent fiber were higher than the critical value of 550 g/kg of DM, which could limit forage intake, demonstrating that the values of forage on offer provided (15.6; 13.7; 13.5; 15.8 kg of DM/100 kg of LW/day in summer, autumn, winter and spring, respectively) were not restrictive to intake. The oversowing of winter cultivated species or fertilization positively alter the degradable fiber content. The seasons had marked influence on the chemical composition of forage apparently consumed; positively increasing some fractions of forage chemical composition in the seasons in which native or cultivated winter species increased their participation. The forage chemical composition is the determining factor in animal performance in natural pasture.en
dc.description.affiliationUniversidade Federal do Rio Grande do Sul (UFRGS) Faculdade de Agronomia Programa de Pós-Graduação em Zootecnia
dc.description.affiliationUniversidad de La República Del Uruguay Faculdad de Agronomía
dc.description.affiliationUniversidade Estadual de São Paulo Programa de Pós-Graduação em Zootecnia
dc.description.affiliationUniversidade Federal do Rio Grande do Sul (UFRGS)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent1360-1368
dc.identifierhttp://dx.doi.org/10.1590/S1516-35982012000600007
dc.identifier.citationRevista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 41, n. 6, p. 1360-1368, 2012.
dc.identifier.doi10.1590/S1516-35982012000600007
dc.identifier.fileS1516-35982012000600007.pdf
dc.identifier.issn1516-3598
dc.identifier.scieloS1516-35982012000600007
dc.identifier.urihttp://hdl.handle.net/11449/30870
dc.language.isoeng
dc.publisherSociedade Brasileira de Zootecnia
dc.relation.ispartofRevista Brasileira de Zootecnia
dc.relation.ispartofsjr0,337
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectaverage daily weight gainen
dc.subjectgas in vitro digestibilityen
dc.subjectneutral detergent fiber corrected for ash and proteinen
dc.subjecttotal digestible nutrientsen
dc.titleQuality of the forage apparently consumed by beef calves in natural grassland under fertilization and oversown with cool season forage speciesen
dc.typeArtigo

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