Table 1. Chemical composition of experimental diets

Items	Treatments
	No-citric acid		Citric acid
	No-heat (SBM)	Heat (HSBM)	No-heat (CSBM)	Heat (HCSBM)
DM (%)	90.3	99.5	89.6	97.4
CP (%DM)	51.6	52.6	47.7	47.9
EE (%DM)	1.83	1.72	1.70	2.18
NDF (%DM)	8.51	16.7	8.02	13.4
Lignin (%DM)	0.80	2.43	1.23	2.03
Ash (%DM)	7.31	7.18	6.94	6.51
GE (MJ/kg of DM)	18.9	19.5	18.7	18.8

SBM, untreated soybean meal; HSBM, heat-treated soybean meal; CSBM, citric acid-treated soybean meal; HCSBM, heat and citric acid-treated soybean meal; DM, dry matter; CP, crude protein; EE, ether extract; NDF, neutral detergent fiber; GE, gross energy.