The effect of dietary tryptophan levels on oxidative stress of liver induced by diquat in weaned piglets

Table 1 Composition and nutrient levels of experimental diets

	Trp 0.18%	Trp 0.30%	Trp 0.45%
Ingredients composition, %
Corn	67.84	67.84	67.84
Extruded full-fat soybean	6.50	6.50	6.50
Soybean meal	4.50	4.50	4.50
Whey powder	6.00	6.00	6.00
Fish meal	5.50	5.50	5.50
Corn gluten meal	6.20	6.20	6.20
Corn starch	0.19	0.20	0.22
L-Lysine· HCL (78%)	0.47	0.47	0.47
L-Threonine (98.5%)	0.08	0.08	0.08
L-Alanine (98.5%)	0.31	0.17	0.00
L-Tryptophan (99%)	0.00	0.13	0.28
Dicalcium phosphate	1.00	1.00	1.00
Calcium carbonate	0.90	0.90	0.90
Sodium Chloride	0.30	0.30	0.30
Choline chloride	0.10	0.10	0.10
Vitamin premix¹	0.03	0.03	0.03
Mineral premix²	0.08	0.08	0.08
Nutrient composition, %
Digestible energy³, MJ/kg	14.22	14.22	14.22
Crude protein⁴	18.49	18.58	18.53
Total lysine⁴	1.22	1.20	1.19
Total methionine and cystine⁴	0.69	0.70	0.72
Total tryptophan⁴	0.19	0.29	0.42
Total threonine⁴	0.70	0.72	0.71
Calcium³	0.88	0.88	0.88
Phosphorus available³	0.49	0.49	0.49

Trp 0.18%, dietary tryptophan level 0.18%; Trp 0.30%, dietary tryptophan level 0.30%; Trp 0.45%, dietary tryptophan level 0.45%.
¹Provided the following per kg of diet: Vitamin A, 2,800 IU; Vitamin D₃, 320 IU; Vitamin E, 20 IU; Vitamin K₃, 1 mg; Vitamin B₁, 1.5 mg; Vitamin B₂, 5 mg; Vitamin B₆, 2 mg; Vitamin B₁₂, 0.03 mg; Nicotonic, 20 mg; Pantothenic, 15 mg; Folic acid, 0.5 mg; Biotin, 0.1 mg.
²Provided the following per kg of diet: Fe (as FeSO₄^.7H₂O), 100 mg; Cu (as CuSO₄^.5H₂O), 6 mg; Zn (as ZnSO₄^.7H₂O), 100 mg; Mn (MnSO₄^.H₂O), 4 mg; Se (as Na₂SeO₃.5H₂O), 0.3 mg; I (as KI), 0.14 mg.
³Calculated nutrient levels.
⁴Measured nutrient levels.

ISSN: 2049-1891