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. 2020 May 26;6(4):447–456. doi: 10.1016/j.aninu.2020.03.009

Table 6.

Effects of imbalanced dietary Met:SAA ratios on plasma amino acid profiles in weaned piglets at d 28 (μg/g).

Item Diets1
 P-value
BD L-MR H-MR
Essential amino acids
 l-methionine 3.45 ± 0.3b 2.61 ± 0.22a 4.11 ± 0.32b 0.005
 l-arginine 54.69 ± 1.54b 45.13 ± 2.79a 45.19 ± 3.34a 0.028
 l-isoleucine 9.26 ± 0.61 8.6 ± 0.93 10.97 ± 1.44 0.280
 l-leucine 16.77 ± 1.01 14.29 ± 1.73 17.31 ± 2.17 0.426
 l-tryptophan 8.71 ± 1.25 6.46 ± 1.2 6.96 ± 0.39 0.285
 l-phenylalanine 9.73 ± 0.58 8.62 ± 0.77 9.63 ± 0.84 0.512
 l-lysine 25.85 ± 1.64 20.79 ± 1.46 25.65 ± 2.4 0.122
 l-histidine 6.66 ± 1.01b 5.14 ± 0.57ab 3.88 ± 0.49a 0.042
 l-valine 19.01 ± 2.4 15.77 ± 2.56 16.24 ± 2.38 0.607
 l-threonine 14.97 ± 2.26 13.15 ± 1.29 10.72 ± 1.12 0.206
Non-essential amino acids
 l-glutamate 52.37 ± 4.94b 31.46 ± 2.15a 40.77 ± 3.95a 0.004
 l-serine 14.49 ± 1.91 11.37 ± 0.79 14.4 ± 1.1 0.203
 l-aspartate 2.32 ± 0.52b 1.22 ± 0.16a 1.93 ± 0.21ab 0.09
 l-alanine 45.25 ± 3.69 34.76 ± 2.99 37.75 ± 1.9 0.055
 Glycine 69.42 ± 8.49 61.72 ± 5.68 66.87 ± 5.22 0.708
 l-cystine 2.32 ± 0.16 2.64 ± 0.32 2.6 ± 0.21 0.609
 l-proline 24.51 ± 1.38b 19.64 ± 0.67a 21.68 ± 1.1ab 0.016
 l-tyrosine 11.76 ± 0.81b 8.83 ± 0.95a 11.47 ± 0.74b 0.041
 SAA 5.77 ± 0.35ab 5.25 ± 0.40a 6.71 ± 0.25b 0.021
 TAA 391.55 ± 15.64 375.89 ± 17.46 348.14 ± 18.21 0.217
 EAA 169.10 ± 6.46 165.64 ± 7.28 150.57 ± 12.51 0.337
 NEAA 222.45 ± 15.61 210.26 ± 15.92 197.47 ± 10.06 0.470
 EAA:NEAA ratio 0.79 ± 0.07 0.82 ± 0.08 0.77 ± 0.06 0.863

Met = methionine; SAA = sulfur amino acid; TAA = total amino acid; EAA = essential amino acid; NEAA = non-essential amino acid.

a, b Within a row, means sharing different superscript letters differ significantly (P < 0.05).

1

BD, a corn-soybean basal diet with Met:SAA ratio at 0.51; L-MR, a plasma powder diet with a low Met:SAA ratio at 0.41; H-MR, a fishmeal diet with a high Met:SAA ratio at 0.61.