Effect of Diurnal Fasting on Broiler Performance Reared under Summer Condition.
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概要
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Two trials were conducted to evaluate the effect of diurnal fasting on broiler performance reared under hot summer condition on litter floor. Equal number of sexed birds, total 800 birds per trial, were raised to 21 days. The birds were divided into 16 pens in each trial at 21 days, 50 birds per pen, and the trial finished at 49 days for trial 1 or 56 days for trial 2. Both trials had four treatments with four pen each, 3 fasting groups and one nonfasting group.Fasting started at 22 days for 5, 6 or 7 hours per day comparing with the nonfasting group in trial 1. Significant (p<0.05) high mortality due to heat stress and poor weight gain per pen were observed in nonfasting group compared with 3 fasting groups. There were no significant difference among 3 fasting groups in mortality due to heat stress and weight gain per pen with heaviest weight gain per pen for 6 hours fasting group.In trial 2, fasting started at 22, 29 or 36 days for 6 hours each per day compared with nonfasting group. Significant high mortality due to heat stress and poor weight gain per pen were observed in nonfasting group compared with 3 fasting groups.There were no significant difference among 3 fasting groups in mortality due to heat stress and weight gain per pen with heavier weight gain per pen for 22 and 29 days fasting groups.These results indicate that diurnal fasting for broilers after 3 weeks of age is effective to alleviate heat stress on broiler reared under hot summer condition. Judging from the result weight gain per pen in 2 trials, the best performance were obtained from the group starting at 22 or 29 days with 6 hours fasting.
- 日本家禽学会の論文
日本家禽学会 | 論文
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