South African Journal of Animal Science
versão On-line ISSN 2221-4062
PEREZ-RUCHEL, A. et al. Rate of intake in wethers fed a temperate pasture with different feeding schedules and supplemented or not with additives. S. Afr. j. anim. sci. [online]. 2009, vol.39, n.5, pp. 157-160. ISSN 2221-4062.
The effect of the feeding schedule and the use of additives on the intake and its rate were studied on animals consuming a temperate pasture. Twenty four wethers (47.8 ± 6.4 kg BW), housed in metabolism cages, were fed a fresh pasture (80% Lotus corniculatus) and assigned to four groups. Group AD had forage available all day; group 1D was fed for 6 h/day; group 1D&B was fed 6 h/day plus 2% DM intake level of buffer (75% NaHCO3-25% MgO) and group 1D&S was fed 6 h/day plus 6.2 x 109 CFU/animal/day of Saccharomyces cerevisiae. Daily intake and its rate were measured weighing the amount offered and refused every one hour for six hours. Orthogonal contrasts were performed on data to study the effect of feeding schedule, the use of additives and the type of additive used. There were no differences in g of DM ingested/kg BW0.75/day (mean value: 52.8). Groups fed 6 h/day showed a higher rate of intake for every hour studied (i.e. hour 2: AD: 5.9 vs. 6 h/day: 7.2). Within groups fed 6 h/day plus the buffer supplemented one presented the highest cumulative intake, at 20.9 g DMi/kg BW.
Palavras-chave : Temperate pasture; feeding schedule; intake; additives.