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. 2018 Jun 2;96(6):2380–2391. doi: 10.1093/jas/sky047

Table 5.

Serum concentrations of postprandial essential and nonessential AA on day 17 of lactation for primiparous sows fed control or low-protein diets

Item Diet P value1 Time relative to feeding P value
CON2 LCP SEM3 Diet 0 h 1 h 2 h 3 h 4 h 5 h SEM PD4 Time5
Number of sows6 6 6
Essential AA, µmol/L
 Arg 166 120 17 0.030 125 170 140 145 148 131 17 4 0.015
 His 144 147 11 0.792 134 152 140 153 153 141 10 4 0.005
 Ile 142 126 7 0.124 115 154 138 136 139 124 11 4 0.010
 Leu 257 203 9 <0.001 212 258 229 225 236 219 12 4 0.010
 Lys 130 156 16 0.279 117 168 144 150 151 128 25 4 0.052
 Met 44 86 5 <0.001 57 68 65 68 70 60 5 4 0.014
 Met + Cys 49 93 6 <0.001 63 75 71 74 76 66 5 4 0.011
 Phe 158 224 17 0.023 176 186 188 204 212 179 21 — NS7
 Phe + Tyr 337 392 26 0.167 344 365 356 379 396 347 24 4 0.068
 Thr 257 366 16 0.001 271 335 315 326 324 298 15 4 0.004
 Trp 48 58 15 0.499 46 56 54 57 59 45 17 4 0.092
 Val 471 579 29 0.024 457 564 539 545 545 498 26 4 0.010
 Total essential AA 1,835 2,075 89 0.080 1,720 2,121 1,961 2,018 2,047 1,866 97 4 0.027
Nonessential AA, µmol/L
 Ala 688 706 70 0.863 625 782 697 695 697 685 55 4 0.001
 Asn 94 65 11 0.047 67 84 95 86 88 79 10 4 0.004
 Asp 27 19 2 0.003 21 25 23 24 22 23 2 5 0.077
 Cys 5.4 7.1 0.9 0.136 5.9 7.1 6.3 6.0 6.1 5.9 0.8 4 0.010
 Gln 600 561 79 0.683 603 556 524 578 607 614 65 3 0.089
 Glu 385 416 38 0.574 387 434 391 384 389 416 30 3 0.017
 Gly 1,058 1,055 138 0.981 1,073 1,031 968 1,081 1,112 1,075 120 3 0.078
 Pro 466 386 30 0.092 404 457 405 420 442 426 27 4 0.002
 Ser 144 113 13 0.042 129 138 120 126 130 139 12 4 0.024
 Tyr 180 168 14 0.554 168 179 168 175 184 168 12 4 0.100
 Total nonessential AA 3,699 3,329 320 0.294 3,430 3,641 3,324 3,524 3,625 3,542 338 4 0.006

1Main effect of dietary treatment; the interactive effect between day of lactation and dietary treatment was P > 0.05, therefore data are not shown.

2CON = control, 16.2% CP (as-fed; analyzed contents); LCP = low crude protein, 12.7% CP.

3Maximum value of the SEM.

4Highest polynomial degree (PD) of significant time effect.

5 P value of specific contrast reported as highest PD.

6Six sows sampled over 12 time points, with 2 time points averaged relative to feeding time.

7NS = nonsignificant; no significant polynomial contrast.