Table 5. Effect of dietary Fe concentration and source on apparent total tract digestibility (%) of nutrients in weanling pigs

Item	Inorganic (ppm)	HME (ppm)			Organic (ppm)	SEM	p-value
Item	100	50	75	100	100	SEM	p-value
Phase I (d 14)
DM	80.67	81.09	82.02	82.41	81.75	0.80	0.177
GE	80.20	76.15	77.28	78.71	77.43	0.50	0.087
CP	77.64	79.85	80.81	81.31	80.73	1.18	0.172
Phase II (d 28)
DM	81.04	80.36	81.26	81.86	81.18	0.68	0.185
GE	75.50^ab	74.82^b	75.63^ab	77.06^a	75.51^ab	0.49	0.005
CP	81.17^a	79.16^b	81.32^a	81.99^a	81.11^a	0.40	0.004

Values with different superscripts of the row significantly differ (p < 0.01).
HME, hot melt extrusion; SEM, standard error of means; DM, dry matter; GE, gross energy; CP, crude protein.