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Table 3 Effect of dietary characteristics and xylanase addition on nutrient digestibility and nitrogen balance of growing pigs (DM basis)1

From: Oat bran and wheat bran impact net energy by shaping microbial communities and fermentation products in pigs fed diets with or without xylanase

Item Xylanase-free diets Xylanase supplementation diets SEM P-value
Basal diet 36% OB 27% WB 15% OB 12% WB Basal diet 36% OB 27% WB 15% OB 12% WB 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 91.0a 86.8bc 80.7d 88.8abc 85.2c 89.9ab 86.0bc 85.3c 89.4abc 87.2abc 1.00 < 0.001 0.043 0.041
 GE 90.2a 86.0b 79.6c 87.9ab 84.2bc 89.1ab 85.4b 81.6bc 88.4ab 86.4ab 1.08 < 0.001 0.082 0.048
 CP 89.6a 86.9a 80.2c 88.2a 84.8ab 88.5a 84.7ab 85.7ab 89.0a 87.0a 1.44 < 0.001 0.045 0.043
 NDF 63.5ab 70.0a 53.3b 63.4ab 57.5ab 61.0ab 63.5ab 58.9ab 65.2ab 60.7ab 2.74 0.003 0.861 0.215
 ADF 65.2a 58.1ab 44.9c 61.4a 56.2ab 63.8a 53.7ab 53.5ab 62.1a 60.4a 3.29 0.022 0.025 0.036
 OM 92.1a 88.8ab 82.6c 90.3ab 86.7bc 91.1a 88.1ab 86.6bc 90.8ab 88.5b 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 36.8b 40.4ab 40.1ab 39.0b 39.3ab 38.3b 45.0a 41.7ab 39.0b 39.1b 1.27 0.002 0.075 0.353
 FN 4.0c 5.4abc 7.7a 4.8bc 6.0abc 4.7bc 7.1ab 7.2ab 4.5bc 5.2abc 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
  1. a,b,c,dValues with different characters in superscripts were different (P < 0.05) in the same row
  2. 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
  3. 2D×X is the interaction between diet and xylanase supplementation