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Table 6 Effects of Saccharomyces cerevisiae fermentation product on rumen microbial protein (MCP) supply of dairy cows fed corn stover-containing diet

From: Effects of Saccharomyces cerevisiae fermentation products on performance and rumen fermentation and microbiota in dairy cows fed a diet containing low quality forage

Itema SCFPb, g/d SEM P-value
0 60 120 180 Linear Quadratic
Urine volumea, L/d 23.0 22.9 22.1 22.3 0.96 0.54 0.90
Urinary PDb, mmol/d
 Allantoin 304 280 351 330 12.6 0.01 0.90
 Uric acid 27.0 28.0 25.3 27.3 1.15 0.74 0.68
Endogenous PD 50.6 45.2 47.7 44.7 3.97 0.63 0.84
Sum 330 307 373 346 12.7 0.05 0.89
MCP, g/d 1,293 1,120 1,459 1,418 47.6 <0.01 0.59
  1. aUrine volume (L/d) = body weight (kg) × 29 (mg/d)/creatinine (mg/L) [25]; Endogenous purine derivatives (PD) = 0.385 × BW0.75; Sum = allantoin + uric acid − endogenous PD; Microbial protein (MCP), indirectly calculated based on PD [22]
  2. b Saccharomyces cerevisiae fermentation product (Diamond V Original XP, Cedar Rapids, Iowa, USA)