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Table 4 Effect of slow-release urea (SRU) supplementation on microbial N production in Rusitec

From: Effect of commercial slow-release urea product on in vitro rumen fermentation and ruminal microbial community using RUSITEC technique

Item Treatmenta   Pb
Control U28 U56 MU35 SEM L Q C vs. MU35
Microbial Nc, mg/d
 Total 78.9 84.5 83.8 83.4 1.88 0.14 0.05 0.03
 LAB 52.8 56.0 55.6 55.3 1.69 0.38 0.61 0.20
 FPA 15.0 15.7 14.9 15.3 0.81 0.97 0.47 0.79
 FPB 9.8 11.4 11.5 11.5 0.65 0.06 0.32 0.08
Efficiency of microbial Nd 9.5 11.5 11.7 10.2 0.30 0.03 0.12 0.17
  1. aControl (no SRU), U28 = control plus 0.28% SRU, U56 = control plus 0.56% SRU, and MU35 = control diet was modified by partially replacing soybean protein with 0.35% SRU (DM basis);
  2. bL, Q = linear and quadratic effects of SRU (control, U28 and U56); C vs. MU35 = Contrast between Control and MU35
  3. cLAB = liquid associate bacteria; FPA = feed particle-associated bacteria; FPB = feed particle-bound bacteria
  4. dEfficiency of microbial N, mg of microbial N production/g of OM fermented