. 2021 May 19;99(7):skab159. doi: 10.1093/jas/skab159

Table 4.

The influence of treatment on NDF and DM flow within the digestive tract and proportion of NDF disappearance within in the small intestine, cecum, and post cecum¹

	Diet²				SEM	P-value
Item	LF	HF	HF + XY	HF + AX
NDF intake, g/d	157	456	460	459	–	–
Disappearance prior to TI³, g	43^a	93^b	105^c	100^c	4	<0.001
Hindgut disappearance⁴, g	65^a	118^b	135^c	94^b	17	0.027
Cecal disappearance⁵, g	6^a	13^a	44^b	8^a	7	<0.001
Colonic disappearance⁶, g	59^a	104^b	92^b	86^b	12	<0.001
Excreted in feces⁷, g	48^a	245^b	220^c	257^b	14	<0.001
Proportion of NDF intake, %
Disappeared prior to TI	27.6^a	20.4^b	22.7^c	23.7^c	2.2	0.012
Disappeared in cecum	4.1^a	3.0^a	9.5^b	1.8^c	2.4	<0.001
Disappeared post cecum	37.6^a	22.8^b	19.9^c	18.6^c	2.3	0.044
Excreted in feces	30.7^a	53.8^b	47.9^c	55.9^b	5.6	<0.001
DM intake g/d	1,854	1,868	1,872	1,875	–	–
Disappearance prior to TI, g	1,382^a	1,088^b	1,168^c	1,104^b	28	0.006
Hindgut disappearance, g	263^a	324^b	301^c	291^c	16	0.031
Cecal disappearance, g	103^a	98^a	162^c	96^a	10	0.008
Colonic disappearance, g	160^a	226^b	139^a	195^b	29	0.034
Excreted in feces, g	209^a	457^b	403^c	473^b	22	0.009
Proportion of DM intake, %
Disappeared prior to TI	74.6^a	58.2^b	62.4^c	59.3^b	1.6	0.014
Disappeared in cecum	5.5^a	5.2^a	8.7^b	5.1^a	0.9	0.015
Disappeared post cecum	8.6^a	12.1^b	7.4^a	10.4^b	1.4	0.018
Excreted in feces	11.3^a	24.4^b	21.5^c	25.2^b	2.1	0.017

¹ n = 15 pigs per treatment per treatment-fed experimental diets for a 36-d adaptation period followed by a 10-d metabolism crate study.

²Dietary treatments include: LF, basal corn-soybean diet; HF, basal corn-soybean diet with 30% corn bran at the expense of corn; HF with the addition of xylanase (HF + XY); HF with the addition of AXOS (HF + AX).

³Disappearance prior to the TI = [intake of component − amount remaining at TI (calculated as concentration of component in digesta × (Cr₂O₃ in diet/Cr₂O₃ in digesta)].

⁴Hindgut disappearance = (amount remaining at TI − amount excreted in feces).

⁵Cecal disappearance = [(ACED% of a given component × intake of component) − disappearance prior to the TI].

⁶Colonic disappearance = [(ATTD% of a given component × intake of component) − (disappearance prior to the TI + cecal disappearance)].

⁷Excreted in feces= [concentration of component in feces × (Cr₂O₃ in diet/Cr₂O₃ in feces)].

^a,b,cWithin a row, means without a common superscript differ (P ≤ 0.05).