Table 1.
Phytogenic feed additives and ameliorative effects on broiler production.
| Feed additives | Level of supplementation | Findings | Sources |
|---|---|---|---|
| Essential oils (Origanum genus) | 300–600 g/kg | Increase in the average daily gain | (74) |
| Cinnamon | 2 g/kg | Improve growth performance | (75) |
| Lippia Javanica leaf meal | 5 g/kg | Improve daily gain and slaughter weight | (76) |
| The mixture of garlic and black pepper powder | 5 g/kg) and 1 g/kg) | Increase in weight gain | (77) |
| Pennyroyal (Mentha pulegium L.) | 2% | Increase in average daily gain | (78) |
| Neem (Azadirachta indica) |
7 g/kg | Favorable influences on the immune | (79) |
| B. subtilis with enramycin | UBT-MO2/kg | Increase in body weight and relative weight of the thymus | (80) |
| Milk kefir | 2% | Improvement on body mass and chicken consumption index | (81) |