Maxiban effects on heat-distressed broiler growth rate and feed efficiency.
1991
Wiernusz C.J. | Teeter R.G.
One study was conducted utilizing 192 male broilers, at 4 to 7 wk posthatching, to evaluate a narasin-nicarbazin drug combination (Maxiban) for effects on bird growth rate, feed efficiency, and survivability during cycling ambient temperature (24 to 35 C) distress, Maxiban did not impact (P > 0.1) live weight gain, but reduced (P < 0.05) gain:feed ratio (unadjusted for mortality), from 0.29 for controls to 0.21 as bird survivability declined (P < 0.05) from 87.5 to 69.8%. Adjusting feed efficiency by adding the gain of birds dying of heat prostration to that for birds surviving the experiment resulted in feed efficiency for supplemented birds being similar (P = 0.48) to birds not consuming Maxiban. Under the conditions of the present study, Maxiban increased the mortality rate of male broilers exposed to cycle ambient temperature of 24 to 35 C during 4 to 7 wk posthatching.
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