Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/15286
Tipo: Artigo
Título: Piata palisade grass deferred with two distinct initial heights: luminous environment and tillering dynamics
Autor(es): Sousa, Braulio Maia de Lana
Santos, Manoel Eduardo Rozalino
Vilela, Hélio Henrique
Silveira, Márcia Cristina Teixeira da
Rocha, Gabriel de Oliveira
Freitas, Cássia Aparecida Soares
Silva, Natascha Almeida Marques da
Nascimento Júnior, Domicio do
Abstract: The study was carried out between March 1st and July 1st, 2011, in order to evaluate the tillering pattern of the deferred Piata palisade grass (Brachiaria brizantha cv. Piata). Three sward heights were evaluated in the beginning of the period of deferment: lower (20 cm), medium (30 cm) and higher (40 cm). The experimental design was of completely randomized blocks with three replications. The Piata palisade grass deferred with low initial height presented lower leaf area index, lower light interception and higher leaf angle in relation to the ones deferred with medium and high heights. The advance in the period of deferment increased the leaf area index and the light interception by the sward, in a way that the highest values were recorded in the periods from 91 and 120 days. The leaf angle reduced linearly with the advance in the period of deferment. For basal and aerial tillers, the rates of appearance, mortality and survival of tillers, as well as the balance between appearance and mortality, and the tiller density stability index were not affected by the initial height of the sward. The stability index of the tiller density was lower in the period from 1 to 30 days of deferment in relation to the periods from 31 to 60, from 61 to 90 and from 91 to 120 days. The variation of the initial height of the Piata palisade grass does not influence the tiller density dynamics during the period of deferment. The reduction of the initial height of the Piata palisade grass improves the luminous environment inside the sward, but it does not stimulate the grass tillering during the period of deferment.
Palavras-chave: Brachiaria brizantha
Deferred grazing
Ecophysiology
Tiller
Editor: Revista Brasileira de Zootecnia
Tipo de Acesso: Open Access
URI: http://dx.doi.org/10.1590/S1516-35982013000100006
http://www.locus.ufv.br/handle/123456789/15286
Data do documento: 4-Set-2012
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