Morphological composition of cultivar of Urochloa brizantha under light intensities / Composição morfológica de cultivares de Urochloa brizantha sob intensidades luminosas
Aline Ribeiro de Santana, Erikelly; Roberto de Lima Meirelles, Paulo; do Carmo Seraphim, Luciane; Aurélio Factori, Marco; Luiza Fournou de Lima, Vania; Carolina de Sá, Janaína.
B. Indústr. Anim.;
702013.
Artigo
em Inglês
| VETINDEX
| ID: vti-467315
Resumo
The implementation of silvopastoral systems (SSP) is a management option that gives good results for animal production, but the shading of the trees can alter production, growth behavior and morphological composition of the forage. The aim of the study was to evaluate the morphological composition of Urochloa brizantha cultivars Marandu and Piatã under natural light and artificial shading of 30 and 60%. The experiment was conducted at FMVZ - UNESP, Botucatu. The experimental design was a randomized block in factorial arrangement 3 x 2 (three shading levels: 0, 30 and 60% and two cultivars: Marandu and Piatã) with three replications and repeated measures in time (3 cuts). Sample collection occurred when the cultivars reached in 35 cm of height. Significant effects (P 0.05) of cultivar x shade x cut interaction were observed on the dry matter production of leaves and stems (Table 1). The higher production of leaves and stems (P 0.05) occurred for Piatã under natural light in the third cut (3731 and 1920 kg/ha, respectively). The absence of shade favored greater leaf production, 35 and 27% higher than the reductions of 30 and 60% respectively. The increment of stems for Piatã under natural light is related to the increase of inflorescences. The leaf:stem ratio was higher (P 0.05 ) for Marandu under natural light (Table 2), with effect from the interaction cultivar x brigO artigo não apresenta resumo em português.
Biblioteca responsável:
BR68.1
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