Table 4. Apparent starch disappearance rates in each segment of gastrointestinal tract in beef steers fed TMR and whey protein (WP)

Item	Treatment¹⁾		SEM²⁾	p-value³⁾
Item	Control	WP	SEM²⁾	p-value³⁾
Starch intake (g/d)	2,666.5	2,666.5	0	-
Duodenal flow (g/d)	843.7	704.4	57.34	0.353
Fecal flow (g/d)	152.8	105.6	23.77	0.094
Disappearance (g/d)
Rumen	1,822.8	1,962.1	57.34	0.353
Intestine	690.9	598.9	65.23	0.654
Total tract	2,513.7	2,560.9	23.77	0.094
Disappearance (%)
Rumen, of intake	68.4	73.6	2.15	0.353
Intestine, of flow	81.0	84.5	3.48	0.333
Total tract, of intake	94.3	96.0	0.89	0.094

Control, TMR 9 kg/d; WP, control with whey protein 400 g/d.
Standard error of mean.
p-values were calculated by paired t-test.
TMR, total mixed ration.