科研之友
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摘要
Este trabalho objetivou avaliar o desempenho e as caracter赤sticas de carca a de bovinos mesti os (5/8 Holand那s/Zebu) em pastejo de ※Brachiaria decumbens§ com acesso restrito ou ※ad libitum§. Utilizaram-se 16 animais com idade e peso m谷dios de 10 meses e 180kg, respectivamente. Os animais foram distribu赤dos em delineamento de blocos casualizados, nos seguintes tratamentos: PAV = pastejo 角 vontade e PR = pastejo restrito (4 horas/dia). O per赤odo experimental teve dura o de 114 dias. Observaram-se diferen a entre os tratamentos(P%26lt;0,05) quanto ao peso vivo final (PVf), de 229,83 e 207,42 kg para o pastejo ※ad libitum§ e restrito, respectivamente, assim como para o ganho m谷dio di芍rio (GMD), de 0,618 e 0,230 kg. Tamb谷m observaram-se diferen a entre os tratamentos (P%26lt;0,05) para peso de corpo vaziofinal (PCVZf) e ganho de peso de corpo vazio di芍rio (GPCVZd), pesos de carca a quente (PCQ) e fria (PCF), rendimento de carca a fria (RCF), expresso em rela o PVf (RCF/PVf), e 芍rea de olho de lombo pelo dois m谷todos utilizados. O desempenho dos animais em PAV apresentou resultado satisfat車rio para o per赤odo das 芍guas em pastagem de Brachiaria decumbens. Os m谷todos para determinar a 芍rea de olho de lombo n o diferiram, sendo recomendado o do ※plastic grid§. The aim of this work was to evaluate the performance and carcass characteristic of crossbred bulls (5/8 holstein/zebu) in grazing of ※Brachiaria decumbens§ with restrict access or %26quot;ad libitum%26quot;. 16 animals with an average of age and live weight of 10 months and 180kg respectively were used. The animals were assigned in a randomized block design, according to the following treatments: ※ad libitium§ grazing (AG) and restricted grazing (RG) (4 hours/day). The experimental period lasted 114 days. There were statistical differences between the treatments (P%26lt;0.05) on final live weight (FLW): 229.83 and 207.42 kg for unlimited grazing and restricted grazing, respectively, as well as for average daily gain (ADG): 0.618 and 0.230 kg. There were also statistical differences between the treatments (P%26lt;0.05) to final empty body weight, daily empty body weight gain, hot and cold carcass weight, cold carcass yield (CCY/FLW) and loin eye area according to the two methods used. The performance of the animals in restricted grazing had satisfactory results to the rainy season in pasture of Brachiaria decumbens. Themethods to determine the loin eye area did not differ. However, the %26quot;plastic grid%26quot; is more recommended.
