Table 1.
Chemical analyses of basal broiler diets.
| Ingredient | Starter | Grower | Finisher |
|---|---|---|---|
| (0–7 d) | (8–21 d) | (22–35 d) | |
| Corn | 55.60 | 57.60 | 61.200 |
| Soybean meal | 39.400 | 35.600 | 32.250 |
| Essential oila | 1.350 | 3.200 | 3.350 |
| Limestone | 1.450 | 1.450 | 1.300 |
| Dicalcium phosphate | 1.400 | 1.400 | 1.200 |
| Salt | 0.210 | 0.210 | 0.200 |
| l-Lysine | 0.120 | 0.120 | 0.100 |
| dl | 0.270 | 0.270 | 0.260 |
| Vitamin–mineral premixb | 0.200 | 0.200 | 0.200 |
| Total % | 100 | 100 | 100 |
| Nutrient composition | |||
| Chemical analysis | |||
| Crude protein (CP) (%) | 24.01 | 22.36 | 21.03 |
| Metabolizable energy (kcal/kg) | 2932.16 | 3054.44 | 3105.30 |
| Fat (g/kg) | 3.860 | 5.748 | 6.002 |
| Calculated analysis | |||
| Calcium (g/kg) | 0.989 | 0.98 | 0.87 |
| Phosphorus (g/kg) | 0.410 | 0.402 | 0.361 |
| Sodium (g/kg) | 0.110 | 0.111 | 0.108 |
| Lysine (g/kg CP) | 1.45 | 1.34 | 1.23 |
| Methionine (g/kg CP) | 0.665 | 0.642 | 0.615 |
| Choline (mg/kg) | 1420.73 | 1329.36 | 1260.18 |
Each dietary treatment (TRT) contained one of the following essential oils: TRT 1, control group that received a basal diet + soybean oil (SO); TRT 2, basal diet as in TRT 1 + sunflower oil (SFO); TRT 3, basal diet as in TRT 1 + canola oil (CO); TRT 4, basal diet as in TRT 1 + flaxseed oil (FLO); TRT 5, basal diet as in TRT 1 + fish oil (FO); TRT 6, basal diet as in TRT 1 + mix of fish oil and soya oil (SO + FO); TRT 7, basal diet as in TRT 1 + algal biomass oil (DHA); TRT 8, basal diet as in TRT 1 + echium oil (EO).
Supplied per kg of premix: trans-retinol (A), 12,500,000 IU; cholecalciferol (D3), 500,000 IU; α-tocopherol acetate (E), 75,000 mg; thiamine (B1), 4,500 mg; riboflavin (B2), 8,000 mg; pyridoxine (B6), 5,000 mg; vitamin B12, 22,000 mg; pantothenic acid, 20,000 mg; folic acid, 2,000 mg; biotin, 200,000 μg; Fe, 100,000 mg; Co,250 mg; Mn, 100 mg; Cu, 10,000 mg; Zn, 80,000 mg; I, 1,000 mg; Se, 300 mg; Mo, 0.5 mg; Ca, 7.7%; P, 0.01%; Na, 0.18%; ash, 97%.