. 2020 Oct 8;11:99. doi: 10.1186/s40104-020-00505-7

Table 3.

Effect of dietary characteristics and xylanase addition on nutrient digestibility and nitrogen balance of growing pigs (DM basis)¹

Item	Xylanase-free diets					Xylanase supplementation diets					SEM	P-value
Item	Basal diet	36% OB	27% WB	15% OB	12% WB	Basal diet	36% OB	27% WB	15% OB	12% WB	SEM	Diet	Xylanase	D×X²
Average BW	35.0	35.5	35.0	35.6	36.5	36.6	38.2	35.9	35.1	35.6	0.96	0.572	0.212	0.313
DMI, kg/d	1.21	1.23	1.28	1.25	1.28	1.26	1.37	1.34	1.25	1.28	0.04	0.295	0.051	0.421
ATTD, %
DM	91.0^a	86.8^bc	80.7^d	88.8^abc	85.2^c	89.9^ab	86.0^bc	85.3^c	89.4^abc	87.2^abc	1.00	< 0.001	0.043	0.041
GE	90.2^a	86.0^b	79.6^c	87.9^ab	84.2^bc	89.1^ab	85.4^b	81.6^bc	88.4^ab	86.4^ab	1.08	< 0.001	0.082	0.048
CP	89.6^a	86.9^a	80.2^c	88.2^a	84.8^ab	88.5^a	84.7^ab	85.7^ab	89.0^a	87.0^a	1.44	< 0.001	0.045	0.043
NDF	63.5^ab	70.0^a	53.3^b	63.4^ab	57.5^ab	61.0^ab	63.5^ab	58.9^ab	65.2^ab	60.7^ab	2.74	0.003	0.861	0.215
ADF	65.2^a	58.1^ab	44.9^c	61.4^a	56.2^ab	63.8^a	53.7^ab	53.5^ab	62.1^a	60.4^a	3.29	0.022	0.025	0.036
OM	92.1^a	88.8^ab	82.6^c	90.3^ab	86.7^bc	91.1^a	88.1^ab	86.6^bc	90.8^ab	88.5^b	0.93	< 0.001	0.122	0.064
UE/DE	1.80	1.97	2.47	1.85	1.77	1.54	2.02	1.63	1.47	1.54	0.26	0.412	0.118	0.353
CH₄E/DE	0.58	0.40	0.57	0.52	0.45	0.51	0.31	0.34	0.55	0.51	0.08	0.142	0.243	0.385
Nitrogen balance, g/d
Intake	36.8^b	40.4^ab	40.1^ab	39.0^b	39.3^ab	38.3^b	45.0^a	41.7^ab	39.0^b	39.1^b	1.27	0.002	0.075	0.353
FN	4.0^c	5.4^abc	7.7^a	4.8^bc	6.0^abc	4.7^bc	7.1^ab	7.2^ab	4.5^bc	5.2^abc	0.58	< 0.001	0.702	0.181
UN	7.1	7.0	6.3	7.7	6.5	6.2	7.6	7.0	7.7	8.7	0.80	0.544	0.298	0.395
RN	25.6	28.0	26.1	26.5	26.8	27.5	30.3	27.5	26.7	25.2	1.28	0.324	0.142	0.571

^a,b,c,dValues with different characters in superscripts were different (P < 0.05) in the same row

¹Treatment means are reported as least squares means and are based on 6 observations per treatment. OB Oat bran, WB Wheat bran; BW Body weight (mean values in collection period); DM Dry matter; DMI Dry matter intake; ATTD Apparent total tract digestibility; GE Gross energy; CP Crude protein; NDF Neutral dietary fiber; ADF Acid detergent fiber; OM Organic matter; UE Urinary energy; CH4E Methane energy; FN Nitrogen output from feces; UN Urinary nitrogen excretion; RN Total retained nitrogen; SEM Standard error of the mean

²D×X is the interaction between diet and xylanase supplementation