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Table 6 Effect of dietary Met:Lys ratio in the lactation diet on the levels of methionine metabolites in the colostrum and milk 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
 Colostrum
  Methionine, μmol/L 3.28 4.69 3.48 3.20 0.42 0.71 0.64 0.62
  Homocysteine, μmol/L 25.66 25.18 38.99 35.29 2.93 0.10 0.26 0.46
  Cystine, μmol/L 0.68 0.76 0.86 0.40 0.09 0.35 0.17 0.26
  Taurine, μmol/L3 575.7 501.7 552.8 552.4 34.7 0.95 0.90 0.92
  Glutathione, μmol/L 53.06 52.72 51.88 50.23 0.58 0.07 0.16 0.31
 Milk at day 7
  Methionine, μmol/L 14.18 16.30 16.13 18.56 0.74 0.05 0.15 0.23
  Homocysteine, μmol/L 30.39 38.19 30.62 32.99 2.33 0.96 0.90 0.66
  Cystine, μmol/L 2.11 2.39 2.62 2.24 0.14 0.67 0.77 0.64
  Taurine, μmol/L3 780.4 944.7 851.9 790.4 24.7 0.70 0.08 0.07
  Glutathione, μmol/L 45.63 47.36 47.41 50.16 0.58 0.01 0.03 0.04
 Milk at day 20
  Methionine, μmol/L 18.41 18.48 16.77 16.49 0.93 0.38 0.68 0.82
  Homocysteine, μmol/L2 9.58B 20.46A 25.01A 29.38A 2.08 0.00 0.00 0.00
  Cystine, μmol/L 2.01 3.39 3.40 2.82 0.21 0.20 0.02 0.05
  Taurine, μmol/L2,3 801.0b 965.3a 927.9ab 1068.4a 29.4 0.01 0.02 0.02
  Glutathione, μmol/L 50.19 50.27 52.29 51.69 0.73 0.32 0.59 0.68
  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 trend for the level of taurine in milk (P = 0.074)