Effect of Mentha piperita and Melissa officinalis powder on performance and digestibility of fat and protein of broilers subjected to heat stress
Abstract:
This study was conducted in order to investigate the effect of Mentha piperita (PP) and Melissa officinalis (MP) powder on performance, apparent digestibility of fat and protein, and blood parameters of broiler chicks subjected to heat stress. Two hundred day-old male Ross broiler chicks were assigned to a completely randomized design with 5 dietary treatments and 4 replicates. The experimental treatments consisted of: 1) control group (without feed additive), 2) group supplemented with 0.5% PP, 3) group supplemented with 1% PP, 4) group supplemented with 0.2% MP and 5) group supplemented with 0.4% MP. The experimental diets were offered to the chicks from 25 to 42 day of age. During the experiment, the birds were kept at 34°C±2 for 8 hours (9.00 to 17.00). The effect of Mentha piperita and Melissa officinalis powder was not significant on feed intake but more body weight gain (BWG) and less feed conversion ratio (FCR) observed in the birds fed diet supplemented with 1% of PP. The apparent digestibility of dry matter and crude fat were not affected by the treatments, but the digestibility of protein was increased (P0.05). The results of this experiment showed that dietary addition of PP at the level of 1% for broilers exposed to heat stress could possibly act as a growth promoter via improving weight gain and digestibility of protein.
Language:
Persian
Published:
Journal of Animal Productions, Volume:18 Issue: 1, 2016
Pages:
119 to 128
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