Improving Heat Resistance of Nile Tilapia (Oreochromis niloticus) by Dietary Zinc Supplementation

Table 1

Basal diet and chemical composition (dry matter).

Ingredients	(%)	Chemical composition	(%)
Soybean meal	23.0	Dry matter
Fish meal	20.0	Crude protein
Rapeseed meal	20.5	Crude fiber
Wheat flour	20.5	Ash
Yellow corn	10.0	Crude lipid
Fish oil	2.5	NFE^2
Dicalcium phosphate	1.5	Gross energy (kJ/g)^2
Zinc-free premix^1	2.0	Total Zn (mg/kg)

¹Zinc-free premix (vitamin and mineral mixture, mg/kg premix): vitamin A (3000 IU), vitamin D3 (1000 IU), vitamin E (2350 mg), vitamin K3 (2800 mg), vitamin B1 (300 mg), vitamin B2 (600 mg), vitamin B6 (400 mg), vitamin B12 (20 mg), D-biotin (40 mg), folic acid (2500 mg), nicotinic acid (2000 mg), inositol (570 mg), D-pantothenic acid (1200 mg), FeSO₄·H₂O (1500 mg), MgSO₄·7H₂O (850 mg), MnSO₄·H₂O (800 mg), CuSO₄·5H₂O (200 mg), KIO₃·6H₂O (5 mg), CoCl₂·6H₂O (5 mg), and Na₂Se₂O₃ (0.05 mg). ²NFE . ³Gross energy was calculated by calorific values for protein, lipid, and carbohydrate as 23.6, 39.5, and 17.2 kJ/g, respectively.