INTAKE AND ACTIVITY BEHAVIOR OF STEERS FINISHED IN FEEDLOT WITH CORN SILAGES OF DIFFERENT PARTICLE SIZES AND CUTTING HEIGHTS
DOI:
https://doi.org/10.5216/cab.v10i2.2987Keywords:
Pastagens, bovinos, nutrição animalAbstract
The experiment was conducted at the Núcleo de Produção Animal (Nupran) of the Universidade Estadual do Centro Oeste do Paraná (Unicentro). The trial aimed to evaluate the effect of particle size (small: between 0.2 and 0.6 cm or large: between 1 and 2 cm) and cutting height (low cut: 15.2 cm or high cut: 38.6 cm) of corn plant for silage on the behavior of confined steers. The treatments were: TPB – small particle size with low cut height; TGB – large particle size with low cut height; TPA – small particle size with high cut height; and TGA – large particle size with high cut height. The roughage:concentrate ratio was 62.7%:37.3%. No significant difference was detected among treatments for the time spent by the animals on feed consumption activity (4.19; 4.03; 4.13 and 4.01 h, respectively). Significant interaction between cutting height and particle size was observed for the time spent with rumination. For the silage with high cutting the time spent with rumination was significantly higher for the large particle size (9.47 h) in relation to the small particle size (7.98 h), however, for the low cutting the difference between the large particle size (9.04 h) and the small particle size (8.73 h) was not significant.
KEY WORDS: Animal behavior, free time, particle separator, rumination time, selectivity.
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