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Table 5 Effect of dietary Met:Lys ratio in the lactation diet on the levels of methionine metabolites in the blood of sows

From: Different dietary methionine to lysine ratios in the lactation diet: effects on the performance of sows and their offspring and methionine metabolism in lactating sows

Items Met:Lys SEM P-value
0.27 0.37 0.47 0.57   Linear Quadratic Feed
No. of sows1
 At parturition
  Methionine, μmol/L3 26.88 27.97 34.11 34.37 1.92 0.11 0.27 0.43
  Homocysteine, μmol/L3 26.78 27.40 26.82 25.47 0.76 0.52 0.67 0.85
  Cystine, μmol/L 10.70 9.51 10.47 7.92 0.60 0.36 0.18 0.39
  Taurine, μmol/L3 52.2 46.1 55.7 50.0 2.0 0.89 0.87 0.85
  Glutathione, μmol/L 74.58 76.77 77.77 79.34 1.52 0.75 0.27 0.55
 At day 7
  Methionine, μmol/L2,3 21.96C 39.57B 49.63B 63.84A 2.75 0.00 0.00 0.00
  Homocysteine, μmol/L2,3 15.88B 15.40B 17.70AB 19.76A 0.47 0.00 0.00 0.00
  Cystine, μmol/L2 6.58ab 7.16a 5.78b 5.49b 0.22 0.01 0.03 0.02
  Taurine, μmol/L3 43.3 61.1 72.7 79.9 5.2 0.01 0.03 0.07
  Glutathione, μmol/L 55.14 53.55 55.34 54.76 0.73 0.92 0.95 0.84
 At weaning
  Methionine, μmol/L2,3 12.21D 26.48C 36.55B 52.99A 2.40 0.00 0.00 0.00
  Homocysteine, μmol/L2,3 13.88B 14.55B 15.40B 18.96A 0.48 0.00 0.00 0.00
  Cystine, μmol/L2 3.90ab 4.11a 3.40b 3.34b 0.11 0.01 0.04 0.02
  Taurine, μmol/L2,3 23.3B 36.6B 30.4B 64.7A 3.8 0.00 0.00 0.00
  Glutathione, μmol/L2 59.31B 59.04B 58.04B 64.97A 0.77 0.02 0.00 0.00
  1. 1The number of samples of sows in each group was more than 9 but not equal; SEM, standard error of the mean
  2. 2Means in the same row with different letters differ significantly; the different lowercase letters represent P < 0.05, and the different capital letters represent P < 0.01
  3. 3There was a treatment × sampling day interaction for plasma methionine (P < 0.001), homocysteine (P < 0.05) and taurine (P < 0.05) concentrations