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Table 4 Effects of early antibiotic intervention on total tract apparent digestibility of pigs with different protein level dietsa

From: Long-term effects of early antibiotic intervention on blood parameters, apparent nutrient digestibility, and fecal microbial fermentation profile in pigs with different dietary protein levels

Item, % Low-CP Normal-CP SEM P-value2
Con Ant Con Ant Ant CP Ant × CP
d 77
 DM 75.24 76.73 74.81 80.52 0.98 0.065 0.368 0.263
 CP 60.00 64.84 64.54 73.45 1.75 0.032 0.040 0.498
 OM 79.86 79.65 78.31 83.32 0.88 0.173 0.538 0.140
 Crude fat 44.61 48.44 53.96 56.88 1.34 0.136 <0.001 0.831
d 185
 DM 77.12 72.61 79.24 71.82 1.67 0.103 0.843 0.666
 CP 72.46 72.45 75.08 73.35 0.67 0.550 0.240 0.550
 OM 82.93 81.67 82.14 80.54 0.51 0.198 0.372 0.867
 Crude fat 50.52 48.48 57.72 56.74 1.34 0.320 <0.001 0.720
  1. DM dry matter, CP crude protein, OM organic matter
  2. aThe commercial creep feed with or without in-feed antibiotics (50 mg/kg olaquindox, 50 mg/kg oxytetracycline calcium, and 50 mg/kg kitasamycin) was fed to pig from d 7 to d 42. Thereafter, the Con and Ant group were further randomly assigned to provide a normal (20%, 18%, 14% CP from d 42 to d 77, d 77 to d 120, d 120 to d 185, respectively) or low CP diet (16%, 14%, 10% CP from d 42 to d 77, d 77 to d 120, d 120 to d 185, respectively), respectively. 2The P values indicate main effects for antibiotic (Ant), protein level (CP) and their interaction (Ant x CP), respectively