Effects of a multi-enzyme complex on growth performance, nutrient utilization and bone mineralization of meat duck

Table 1 Diet composition of the positive and negative controls (as-fed basis)

Item	1 to 14 d			15 to 35 d
Item	PC ¹	NC1	NC2	PC	NC1	NC2
Ingredients, %
Corn	51.00	49.50	48.40	46.50	47.00	47.50
Rice bran	5.00	5.00	5.00	8.00	8.00	8.00
Wheat bran	8.00	9.00	10.00	15.00	15.00	15.00
Soybean oil	0.60	0.32	0.30	3.88	2.93	2.40
Soybean meal, CP 43%	20.00	19.00	18.50	8.00	7.60	7.60
Rapeseed meal, CP 36%	5.00	6.00	6.40	8.00	8.50	8.50
Cottonseed meal, CP 42%	5.00	5.00	5.00	6.00	6.00	6.00
L-Lysine HCl	0.240	0.233	0.235	0.270	0.255	0.250
DL-Methionine	0.211	0.203	0.202	0.126	0.118	0.116
Calcium carbonate	0.985	1.075	1.202	0.960	1.050	1.178
Dicalcium phosphate	1.490	0.885	0.580	1.175	0.580	0.280
L-Threonine	0.045	0.036	0.035	0.044	0.032	0.028
L-Tryptophan,10%	0.760	0.720	0.710	0.320	0.285	0.275
Bentonite	0.589	1.948	2.356	0.695	1.620	1.843
NaCl	0.40	0.40	0.40	0.40	0.40	0.40
Choline chloride	0.15	0.15	0.15	0.10	0.10	0.10
Vitamin premix^a	0.03	0.03	0.03	0.03	0.03	0.03
Mineral premix^b	0.50	0.50	0.50	0.50	0.50	0.50
Total	100.00	100.00	100.00	100.00	100.00	100.00
Calculated nutrients
Metabolizable energy, kcal/kg	2,800	2,730	2,700	2,900	2,830	2,800
Crude protein, %	19.39	19.31	19.30	16.47	16.46	16.48
Calcium, %	0.85	0.75	0.73	0.76	0.66	0.64
Total phosphorous, %	0.77	0.68	0.64	0.79	0.69	0.64
Available phosphorous, %	0.42	0.32	0.27	0.38	0.28	0.23
Digestible Lysine, %	0.95	0.93	0.92	0.76	0.74	0.74
Digestible Methionine, %	0.45	0.45	0.44	0.33	0.33	0.32
Digestible Threonine, %	0.63	0.61	0.61	0.51	0.50	0.49
Digestible Tryptophan, %	0.26	0.25	0.25	0.17	0.17	0.17

^a,bVitamin and mineral content of the diets derived from the premixes were as follows (supplied per kg): vitamin A, 3,000 IU; vitamin D₃, 1,500 IU; vitamin E, 7.5 IU; vitamin B_1, 0.6 mg; vitamin B_2, 4.8 mg; vitamin B₆, 1.5 mg; vitamin B₁₂, 0.009 mg; pantothenic acid, 7.5 mg; folic acid, 0.15 mg; niacin, 20 mg; Cu (CuSO₄•5H₂O), 8 mg; Fe (FeSO₄•7H₂O), 80 mg; Zn (ZnSO₄•7H₂O), 90 mg; Mn (MnSO₄•H₂O), 70 mg; Se (NaSeO₃), 0.3 mg; I (KI), 0.4 mg.
¹PC = positive control; NC1 = -70 kcal/kg, -2.0% digestible amino acids (DAA), -0.1 percentage point available P (avP), -0.1 percentage point Ca; NC2 = -100kcal/kg, -2.5% DAA, -0.15 percentage point avP, -0.12 percentage point Ca.

ISSN: 2049-1891