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Arquivo Brasileiro de Medicina Veterinária e Zootecnia

On-line version ISSN 1678-4162

Abstract

GALZERANO, L. et al. Changes in the vertical structure of xaraés palisadegrass pastures under intermittent stocking by cattle. Arq. Bras. Med. Vet. Zootec. [online]. 2015, vol.67, n.5, pp.1343-1352. ISSN 1678-4162.  http://dx.doi.org/10.1590/1678-4162-7435.

ABSTRACT

The aim of this study was to evaluate the effects of residual leaf area index (rLAI), years of evaluation and grazing cycles in the vertical structure of the canopy and the proportion of morphological components of xaraés palisadegrass pastures submitted to grazing intensities in two summers. The experiment was carried out at the Faculdade de Ciências Agrárias e Veterinária of Unesp, Campus of Jaboticabal, SP and the intensities of grazing were defined by four rLAI: 0.8, 1.3, 1.8 and 2.3. When the canopy intercepted 95% of incident light, the animals were placed on the pasture for grazing and kept until the rLAI target had been reached. Pastures were grazed by non-lactating Holstein cows (Bos taurus taurus L.) using the mob-stocking technique. the proportion of the morphological components of the pasture and the vertical structure of the canopy by the inclined point device was evaluated. Residual leaf area index from 1.3 to 1.8 are the best in relation to the vertical structure of the canopy and proportion of the morphological components of the pasture submitted to grazing intensities.

Keywords : Brachiaria; inclined point; LAI; light interception; Urochloa.

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