Table 1.

Dietary ingredients and chemical composition (g/kg DM).

Item	Group1
	LCD	MCD	HCD
Ingredient, % of DM
Dry rice straw	41.50	26.50	11.50
Corn silage	23.50	23.50	23.50
Corn	18.35	24.87	36.32
Wheat bran	5.33	11.10	10.43
Soybean meal	9.52	12.23	16.45
CaHPO4	0.30	0.30	0.30
NaCl	0.50	0.50	0.50
Premix2	1.0	1.0	1.0
Total	100	100	100
Nutrient composition3
OM, % of DM	92.58	92.69	92.47
EE, % of DM	3.35	3.49	3.66
CP, % of DM	12.59	13.61	14.42
ADF, % of DM	25.43	20.70	14.62
NDF, % of DM	48.59	41.56	35.01
NEm,4 MJ/kg DM	8.42	9.67	10.91
Ca, % of DM	0.61	0.68	0.63
P, % of DM	0.32	0.35	0.37

¹LCD, 35:65 concentrate:forage; MCD, 50:50 concentrate:forage; HCD, 65:35 concentrate:forage;

²Premix contained (per kg of premix): 420,000 IU of vitamin A, 110,000 IU of vitamin D₃, 4,200 IU of vitamin E, 2620 mg of Fe, 155 g of Ca, 30 g of P, 820 mg of Cu, 1,800 mg of Mn, 3,500 mg of Zn, 30 mg of I, 35 mg of Se, and 22 mg of Co.

³OM, organic matter; EE, ether extract; CP, crude protein; NDF, neutral detergent fiber; ADF, acid detergent fiber; NEm, net energy for maintenance; Ca, calcium; P, phosphorus.

⁴Calculated.