Table 4. Effect of dietary xylose concentration and collection period on water balance.

	Dietary treatment, % xylose inclusion						Collection period					T×C1
Item	0	2	4	8	SEM	P-value	d 5–7	d 12–14	d 19–21	SEM	P-value	P-value
Water waste, ml/d	853	796	1024	1265	321	0.3633	1404x	712y	837y	294	0.0001	0.4096
Water intake‡, ml/d	2447b	2532b	2762ab	3017a	222	0.0424	3025x	2551y	2493y	176	<0.0001	0.4352
Urine output‡, ml/d	984c	1159bc	1286ab	1566a	129	0.0032	1465x	1196y	1085z	74	<0.0001	0.7898
Urine specific gravity	1.034	1.031	1.025	1.029	0.009	0.0656	1.029xy	1.028y	1.032x	0.009	0.0087	0.2528

Pigs (n = 12/treatment) were housed individually in metabolism crates and fed diets containing either 0, 2, 4, or 8% D-xylose at 4% of BW. Water intake and urine output were measured during 3 different collection periods representing increasing adaptation time to treatment diets.

^a-cTreatment means without a common superscript differ (P ≤ 0.05)

^x-zCollection period means without a common superscript differ (P ≤ 0.05)

¹Dietary treatment × collection period interaction (T×C)

^‡Treatment linear contrast is significant at P < 0.01