Long-term effects of early antibiotic intervention on blood parameters, apparent nutrient digestibility, and fecal microbial fermentation profile in pigs with different dietary protein levels

Table 1 Ingredient and nutrient composition of experimental diets (%, as-fed basis)^a

Age range, d: Ingredient, %	42 to 77		77 to 120		120 to 185
Age range, d: Ingredient, %	LP-16%	NP-20%	LP-14%	NP-18%	LP-10%	NP-14%
Corn	68.00	63.70	68.90	58.00	82.40	71.10
Soybean meal	18.00	21.00	18.80	29.38	8.71	19.13
Wheat bran	−	−	6.00	8.00	2.00	4.00
Whey power	4.30	4.30	−	−	−	−
Fishmeal	3.20	8.00	−	−	−	−
Soybean oil	2.70	0.70	2.56	1.60	2.50	2.00
Dicalcium phosphate	0.85	0.10	0.78	0.65	0.90	0.80
Calcium carbonate	0.50	0.36	0.89	0.89	0.82	0.90
Sodium chloride	0.30	0.30	0.30	0.30	0.30	0.30
Vitamin mixture^b	0.20	0.20	0.20	0.20	0.20	0.20
Mineral mixture^b	0.80	0.80	0.80	0.80	0.80	0.80
L-Lysine	0.65	0.33	0.49	0.17	0.78	0.48
DL-Methionine	0.20	0.09	0.10	−	0.20	0.11
L-Threonine	0.24	0.10	0.15	0.01	0.30	0.15
L-Tryptophane	0.06	0.02	0.03	−	0.09	0.03
Calculated content^c, %
ME^d, MJ/kg	14.02	14.02	13.82	13.80	13.81	13.82
SID AA^e, %
Lysine	1.23	1.23	0.99	0.98	0.98	0.99
Methionine + Cysteine	0.68	0.68	0.56	0.56	0.60	0.56
Threonine	0.73	0.73	0.59	0.60	0.61	0.60
Trptophane	0.20	0.20	0.17	0.20	0.18	0.17
Analyzed nutrient composition^f, %
Crude protein	16.63	20.11	14.03	18.02	10.18	14.06

^aThe pigs of control and antibiotic groups were divided to 1 of 2 treatment groups (normal vs. low CP diet) after d 42. LP low protein diet, NP normal protein diet
^bProvided per kilogram of diet: vitamin A, 2.85 million IU; vitamin D₃, 0.6 million IU; vitamin E, 67.50 IU; vitamin K₃, 750 mg; vitamin B₁,750 mg; vitamin B₂, 1500 mg; vitamin B₆, 900 mg; vitamin B₁₂, 7.5 mg; nicotinic acid, 7500 mg; folic acid, 300 mg; calcium pantothenate, 3750 mg; biotin, 37.5 mg; vitamin B₄, 100 mg; antioxidants, 15 mg; Cu (CuSO₄ ^.5H₂O), 60 mg; Fe (FeSO₄ ^.H₂O), 51.6 mg; Co (CoCl₂), 50 mg; Mn (MnSO₄ ^.H₂O), 25 mg; Zn (ZnSO₄ ^.H₂O), 21.2 mg; Zn (ZnO), 6 mg; I (KI), 3.9 mg; Se (Na₂SeO₃), 3.0 mg; Carrier (Sepiolite) 604.3 mg
^cCalculate values according to NRC [16]
^dME = metabolizable energy
^eSID AA = standardized ileal digestible AA
^fAnalytical results obtained according to AOAC [17]

ISSN: 2049-1891