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Under practical conditions of thermal stress (temperature, 22.8 to 36.9 and relative humidity (RH), 31 to 95%) over a period of four months, the egg production of 30-and 62-weekold Rhode Island Red X Barred Plymouth Rock layers was improved significantly (P<.05) when the birds were under night feeding combined with stimulighting, ventilated at 9 cfm/bird and provided cold water (0 C) for drinking. The layers laid at the highest rate with .05% dietary aspirin although the performance on .10, .15, and .20% dietary aspirin and on 100 mg/kg ascorbic acid compared satisfactorily. The older layers benefited about equally on .05. .10. and .1 5% dietary aspirin and on 100. 150. and 200 mg/kp ascorfrir acid in mmpiriain with the control.Except that aspirin had more beneficial effect on shell thickness, the increased feed intake associated with the treatments appeared to have been used for egg formation rather than for improving egg quality.The growth rate of the chicks of this hybrid was significantly higher with dietary supplementation with aspirin at .15 and .20% and ascorbic acid at 150 and 200 mg/kg. The efficiency of feed utilization largely followed the trend in growth rate.1979 Poultry Science 58:767-773

Equal numbers of day old White Rock and Nigerian indigenous male chicks were reared to 10 weeks of age under 4 variables consisting of 2 dietary regimes and 2 regimes of immunity (natural versus vaccinal) to Newcastle disease challenge. Although White Rock grew significantly faster, ate more food and tended to be more efficient in feed utilisation than the indigenous chicks, the mortality of the latter was significantly lower. Growth rate and feed intake were significantly greater, feed efficiency better and prechallenge mortality lower in birds fed on the higher crude protein diet. Prechallenge mortality was significantly lower in birds that had been vaccinated against Newcastle disease.

Akpodiete, O.J., Ologhobo, A.D. and Oluyemi, J.A. 1997

No abstract