Canopy characteristics and behavior of Nellore heifers in Brachiaria brizantha pastures under different grazing heights at a continuous stocking rate

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dc.contributor.authorCasagrande, Daniel Rume [UNESP]
dc.contributor.authorAzenha, Mariana Vieira [UNESP]
dc.contributor.authorValente, André Luis da Silva [UNESP]
dc.contributor.authorVieira, Bruno Ramalho [UNESP]
dc.contributor.authorMoretti, Matheus Henrique [UNESP]
dc.contributor.authorRuggieri, Ana Cláudia [UNESP]
dc.contributor.authorBerchielli, Telma Teresinha [UNESP]
dc.contributor.authorReis, Ricardo Andrade [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:18:15Z
dc.date.available2014-05-20T13:18:15Z
dc.date.issued2011-11-01
dc.description.abstractThe objective of this study was to evaluate the Brachiaria brizantha cv. Marandu canopy structure maintained at different grazing heights under a continuous stocking rate and with a dietary supplementation strategy for the animals during the rainy season. This study also intended to observe the relationships of these variables with the grazing behaviors of the heifers. The effects of three canopy heights (15, 25 and 35 cm) were evaluated in association with three types of supplements: one mineral and two protein/energy supplements, the first with a high rumen degradable protein and energy and the others with a low ratio. Both the protein/energy supplements were provided at 0.3% of body weight/day. The experimental design was completely randomized, with two replications and repeated measures, and took place during the period from January to April 2008. The supplementation strategies did not affect any variable related to the canopy structure. Total and green herbage masses and the ratio of green/dead material increased with canopy height. The leaf/stem ratio was higher in the lowest canopy height: 15 cm. Changes in the canopy structure caused variations in the grazing behavior of the animals. Animals maintained in the 15-cm-tall pasture grazed for a longer time, increasing the time for each meal, but the number of meals was lower than that of the animals grazing within the 35-cm-tall pasture. The grazing time of animals receiving the energy/protein supplement was lower only in the period of the day during which it was supplied. Canopy structure is affected by sward height, and changes animal behavior. Supplementation does not affect the canopy structure of the pastures with similar heights.en
dc.description.affiliationUNESP Faculdade de Ciências Agrárias e Veterinárias
dc.description.affiliationUnespUNESP Faculdade de Ciências Agrárias e Veterinárias
dc.format.extent2294-2301
dc.identifierhttp://dx.doi.org/10.1590/S1516-35982011001100003
dc.identifier.citationRevista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 40, n. 11, p. 2294-2301, 2011.
dc.identifier.doi10.1590/S1516-35982011001100003
dc.identifier.fileS1516-35982011001100003.pdf
dc.identifier.issn1516-3598
dc.identifier.lattes5317385915649516
dc.identifier.lattes8605438226392855
dc.identifier.scieloS1516-35982011001100003
dc.identifier.urihttp://hdl.handle.net/11449/4413
dc.identifier.wosWOS:000297796400003
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.subjectcanopy heighten
dc.subjectGrazing behavioren
dc.subjectgrazing timeen
dc.subjectherbage massen
dc.subjectnumber of mealsen
dc.titleCanopy characteristics and behavior of Nellore heifers in Brachiaria brizantha pastures under different grazing heights at a continuous stocking rateen
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/rbz/paboutj.htm
unesp.author.lattes5317385915649516
unesp.author.lattes8605438226392855
unesp.author.lattes6555511233950866[6]
unesp.author.orcid0000-0002-8026-7324[7]
unesp.author.orcid0000-0002-4709-3094[8]
unesp.author.orcid0000-0002-9646-8489[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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