Dissertação
Comportamento ingestivo de novilhas e terneiras de corte recriadas em campo nativo no período de outono-inverno
Fecha
2011-02-23Registro en:
CARVALHO, Thiago Henrique Nicola de. INGESTIVE BEHAVIOR OF BEEF HEIFERS AND CALVES REARED
IN NATURAL PASTURE UNDER ROTATIONAL GRAZING DURING
AUTUMN-WINTER. 2011. 72 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Santa Maria, Santa Maria, 2011.
Autor
Carvalho, Thiago Henrique Nicola de
Institución
Resumen
A experiment, in the period May- September 2011, was conducted in an area of
Universidade Federal de Santa Maria studying the ingestive behavior of beef heifers and
calves in a natural grassland of Rio Grande do Sul, under rotational grazing with different
intervals among grazing. The intervals among grazing was determinated by the thermal sums
of 375 and 750 degree-days for each treatment. Grazing, leisure and rumination times, time
spent in the supplementation and water troughs was evaluated on three occasions using visual
assessment periods of 24 uninterrupted hours. Bite rates, feed stations and number of steps
between stations were evaluated in two observations, one at the beginning and another at the
end of the experiment. No differences were found among animal categories for these
measures. There were differences in grazing and leisure times, between treatments, on the last
evaluated period and could be attributed to differences between forage mass. Number of feed
stations was different between periods and differed between treatments only in the second
evaluation. The number of steps between stations was different between the two periods with
only difference between treatments in the first assessment. Bite rate varied among the
treatments in both evaluations. It was concluded that differences in sward structure, caused by
the treatments, affected feeding behavior of both categories, and there were no differences
between them.