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Table 3 Relative abundance of microbial species in mixed ruminal fluid from Holstein cows fed a control diet (CON) or CON supplemented with rumen-protected methionine (SM) during the periparturient period

From: Rumen-protected methionine during the peripartal period in dairy cows and its effects on abundance of major species of ruminal bacteria

      Day × Treatment    
  Treatment Day CON SM P value1
Species CON SM −10 20 −10 20 −10 20 Trt Day T × D
A. lipolytica 3.28×10−3 3.42×10−3 2.50×10-3b 4.48×10-3a 2.25×10−3 4.77×10−3 2.77×10−3 4.21×10−3 0.82 <0.01 0.42
B. proteoclasticus 1.07×10−2 8.88×10−3 1.01×10−2 9.46×10−3 1.24×10−2 9.29×10−3 8.18×10−3 9.64×10−3 0.20 0.67 0.13
E. ruminantium 2.44×10−2 2.45×10−2 2.23×10−2 2.69×10−2 2.59×10−2 2.31×10−2 1.92×10−2 3.13×10−2 0.98 0.38 0.16
F. succinogenes 7.10×10−4 6.93×10−4 1.16×10-3a 4.25×10-4b 6.29×10-4B 8.02×10-4B 2.13×10-3A 2.25×10-4C 0.92 <0.01 <0.01
M. elsdenii 3.90×10−5 1.90×10−5 2.40×10-6b 2.34×10-4a 4.60×10−6 2.07×10−4 1.00×10−6 2.65×10−4 0.43 <0.01 0.24
P. bryantii 4.22×10−3 1.30×10−3 7.61×10-4b 7.20×10-3a 1.12×10−3 1.60×10−2 5.19×10−4 3.25×10−3 0.12 <0.01 0.57
S. ruminantium 4.10×10-1a 2.98×10-1b 2.63×10-1b 4.65×10-1a 2.63×10-1C 6.39×10-1A 2.63×10-1C 3.37×10-1BC 0.01 <0.01 0.01
S. amylolytica 1.02×10−4 2.30×10−4 2.51×10−4 9.40×10−5 9.90×10-5B 1.05×10-4B 6.32×10-4A 8.40×10-5B 0.16 0.07 0.05
S. dextrinosolvens 9.10×10−5 1.60×10−4 1.71×10-4a 8.50×10-5b 8.10×10-5B 1.02×10-4B 3.64×10-4A 7.00×10-5B 0.10 0.05 0.01
S. bovis 8.09×10−3 3.50×10−3 3.17×10-3b 8.93×10-3a 6.68×10−3 9.79×10−3 1.51×10−3 8.14×10−3 0.22 0.02 0.14
  1. 1Trt treatment effect, Day day effect, T × D Treatment by Day interaction
  2. abMeans for overall Treatment or Day effect differ (P < 0.05)
  3. A-CMeans for the interaction of Day × Treatment differ (P < 0.05)