Effects of exogenous enzymes and dietary energy on performance and digestive physiology of broilers

Table 2 Composition and nutrients levels of basal diets

Items	PC		NC
	Starter	Grower	Starter	Grower
	0- 21 d	22-42d	0- 21 d	22-42d
Ingredients, %
Corn	52.50	60.10	52.50	60.10
Soybean meal	39.10	33.20	39.10	33.20
Rapeseed oil	3.03	2.98	1.95	1.90
CaCO₃	0.80	0.66	0.80	0.66
CaHPO₄	1.80	1.60	1.80	1.60
DL- Methionine	0.19	0.13	0.19	0.13
Choline chloride	0.15	0.10	0.15	0.10
NaCl	0.40	0.40	0.40	0.40
Vitamin premix¹	0.03	0.03	0.03	0.03
Mineral premix²	0.50	0.30	0.50	0.30
Betonite³	1.50	0.50	2.58	1.58
Total	100.0	100.0	100.0	100.0
Calculated nutrient content
ME, kcal/kg	2,903.85	3,001.84	2,803.47	2,903.85
Crude protein, %	21.01	19.08	21.01	19.08
Met, %	0.49	0.41	0.49	0.41
Lys, %	1.14	1.01	1.14	1.01
Met + Cys, %	0.81	0.71	0.81	0.71
Thr, %	0.80	0.73	0.80	0.73
Calcium, %	0.97	0.80	1.14	1.01
Nonphytate, % P	0.44	0.40	0.44	0.40

¹Provided per kg of diet: vitamin A, 4 × 10⁷ IU; vitamin D₃, 1 × 10⁷ IU; vitamin E, 25,000 IU; vitamin K₃, 5,000 mg; thiamin, 2,000 mg; riboflavin,16,000 mg; vitamin B₆, 6,000 mg; vitamin B₁₂, 30 mg; folic acid, 500 mg; niacin, 35,000 mg; Ca-D-panthothenate, 25,000 mg.
²Provided per kg of diet: Fe(FeSO₄.H₂O),100 mg; Cu(CuSO₄.5H₂O);8 mg; Mn(MnSO₄.H₂O),120 mg; Zn (ZnSO₄.H₂O),100 mg; Se (Na₂SeO₃), 0.3 mg; I (KI), 0.7 mg.
³The part of betonite in the basal diet was replaced by BM, AG, or XG for different dietary treatments.

ISSN: 2049-1891