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Table 2 Influence of dietary treatments on characteristics of digestion

From: Influence of ruminal degradable intake protein restriction on characteristics of digestion and growth performance of feedlot cattle during the late finishing phase

  Urea fermentation potential P - value  
Item 0 0.6 1.2 Linear Quadratic SEM
Steer replications 6 6 6    
Intake (g/d)  
DM 3556 3553 3551    
OM 3343 3359 3378    
NDF 453 455 457    
N 66.2 57.6 48.2    
Starch 1907 1919 1932    
GE (Mcal/d) 15.2 15.2 15.3    
Flow to the duodenum (g/d)  
OM 1655 1749 1894 0.05 0.76 83.0
NDF 338 370 456 0.05 0.55 42.0
Starch 385 441 533 0.08 0.77 61.0
Total N 76.4 68.8 64.4 0.04 0.70 4.0
Microbial N 40.6 34.7 31.4 0.04 0.69 3.0
NH-N 2.30 2.04 1.58 0.06 0.72 0.3
Non-ammonia N 74.1 66.7 62.9 0.04 0.66 3.8
Feed N 24.7 23.2 22.7 0.20 0.71 0.9
Ruminal digestibility, %  
OM 62.6 58.3 53.23 0.04 0.91 0.3
NDF 25.3 18.6 0.30 0.05 0.54 0.9
Starch 79.8 77.0 72.4 0.09 0.78 0.3
Feed N 62.6 59.7 52.9 0.04 0.64 0.5
Microbial efficiency1 19.4 17.8 17.5 0.06 0.40 0.7
N efficiency2 1.12 1.16 1.30 0.05 0.44 0.07
Fecal excretion (g/d)  
OM 624 705 756 0.06 0.77 48.0
NDF 282 319 348 0.06 0.87 25.0
Starch 35.9 49.0 56.6 0.10 0.78 9.4
Total N 20.9 22.2 21.8 0.48 0.44 1.0
GE (Mcal/d) 3.28 3.66 3.90 0.05 0.75 0.84
Postruminal digestibility (% of flow to duodenum)  
OM 62.2 59.7 60.0 0.37 0.49 1.9
NDF 15.3 11.2 22.8 0.41 0.33 7.3
Starch 90.5 89.1 89.3 0.60 0.69 1.9
Total N 72.6 67.6 66.2 0.08 0.53 2.7
Total tract digestibility (% of intake)     
OM 81.3 79.0 77.6 0.06 0.75 1.4
NDF 37.8 29.8 23.9 0.07 0.85 5.3
Starch 98.1 97.4 97.1 0.11 0.77 0.5
Total N 68.5 61.5 54.9 0.04 0.97 4.5
DE, % 78.5 76.0 74.5 0.05 0.74 1.4
DE, Mcal/kg 3.36 3.26 3.20 0.05 0.73 0.06
  1. 1Microbial N, g/kg OM fermented.
  2. 2Nonammonia N flow to the small intestine as a fraction of N intake.
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