Table 1. Ingredients and nutrients of the experimental diets

Items	Value (% of DM basis)
Ingredients (% of DM)
Concentrate	15.3
Soybean meal	2.40
Corn silage	47.2
Alfalfa hay	7.10
Tall fescue	9.40
Timothy	5.90
Energy booster1)	7.10
Cash gold1)	4.50
Lyzin-Plus2)	0.20
Limestone3)	0.20
Zin care1)	0.10
Supex-F1)	0.50
Trace minerals4)	0.05
Vitamins premix5)	0.05
Chemical composition (% of DM basis)
DM (%)	53.2
Crude protein	10.0
Neutral detergent fiber	28.2
Acid detergent fiber	16.9
Calcium	0.40
Phosphorus	0.15

Zin Care, Contained 16 GDU/g protease bromelain, 2.0 × 10⁸ cfu/g. Supex-F, Contained 99% protected fat from of palm oil (Cofavet, Cheonan, Korea).
Lyzin-Plus, Contained 6.0% Zn, 0.9% Cu, 1.4% Mn, 5.0% chelated glycine (A.N.Tech, Cheonan, Korea).
Sungshin minefield, Jeongseon, Korea.
Trace minerals, Contained 0.40% Mg; 0.20% K; 4.00% S; 0.08% Na; 0.03% Cl; 400 mg of Fe/kg; 60,042 mg of Zn/kg; 16,125 mg of Cu/kg; 42,375 mg of Mn/kg.
Vitamins premix, Provided approximately 5,000 KIU of vitamin A/kg; 1,000 KIU of vitamin D/kg; 33,500 mg of vitamin E/kg; 2,400 mg of vitamin C/kg.
DM, dry matter.