The effects of using different levels of pennyroyal (Mentha pulegium) medicinal plant on performance in broilers and laying hens
2011
Nobakht, A., Islamic Azad University- Maragheh Branch | Safamehr, A.R., Islamic Azad University- Maragheh Branch | Norani, J., Islamic Azad University- Maragheh Branch | Moghaddam, M., Islamic Azad University- Maragheh Branch
Two experiments were conducted to evaluate the effects of using different levels of pennyroyal (Mentha pulegium) medicinal plant on performance in broilers and laying hens. The levels of pennyroyal in each of these two experiments were 0, 0.5, 1, 1.5 and 2 percent. In 1st experiment 300 Ross- 308 broilers in 5 treatments and 3 replicates (with 20 birds in each replicate) for 42 days and in 2th experiment 180 Hy- line (W36) laying hens in 5 treatments and 3 replicates (with 12 hen in each replicate) from 60 - 72 weeks of age were used in completely randomized design. The results showed that the using of different levels of pennyroyal medicinal plant has significantly effects on performance in broilers and laying hens (p0.05). In broilers the highest amount of daily weight gain (46.24 g), the best feed conversion ratio (1.69) and the lowest percent of heart (0.84) and in laying hens the highest amount of specific gravity (1.083) were observed in experiment group 2 by using 0.5 percent of pennyroyal medicinal plant. Also, in broilers the highest percent of breast (33.29) and lowest percents of thighs (25.43) and in laying hens the highest amount of egg albumin weight (44.51g) and egg yolk weight (21.31g) were observed in experiment group 3 by using 1 percent of pennyroyal medicinal plant. The overall results showed that the using of 0.5 and 1 percents of pennyroyal medicinal plant lead to improving performance in broilers and laying hens.
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