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Table 3 Effects of lysine level fed during each phase on nursery pig performance a

From: Practical starter pig amino acid requirements in relation to immunity, gut health and growth performance

Items Standardized ileal digestible lysine, %  
d 0 to 7 1.35 1.35 1.35 1.35 1.55 1.55 1.55 1.55  
d 7 to 21 1.15 1.15 1.35 1.35 1.15 1.15 1.35 1.35 Probability, P <
d 21 to 35 1.05 1.25 1.05 1.25 1.05 1.25 1.05 1.25 SEM Phase 1 Phase 2 Phase 3
d 0 to 7             
ADG, g 161 151 152 162 155 163 159 161 19.9 0.69 0.89 0.72
ADFI, g 171 164 157 164 145 150 149 162 15.0 0.37 0.94 0.55
G:F 0.962 0.926 0.965 0.997 1.054 1.089 1.074 0.984 0.059 0.01 0.93 0.63
d 7 to 21             
ADG, g 363 365 366 371 346 333 370 375 15.8 0.41 0.18 0.98
ADFI, g 541 530 512 521 508 506 498 517 18.4 0.16 0.49 0.78
G:F 0.674 0.687 0.716 0.711 0.680 0.660 0.742 0.723 0.016 0.75 0.03 0.43
d 21 to 35             
ADG, g 561 616 579 614 555 573 540 593 35.1 0.20 0.78 0.001
ADFI, g 934 915 943 956 907 883 883 925 34.6 0.37 0.53 0.85
G:F 0.601 0.674 0.614 0.643 0.613 0.649 0.612 0.640 0.031 0.60 0.39 <.0001
d 0 to 35             
ADG, g 402 422 406 426 389 395 395 419 11.3 0.15 0.30 0.03
ADFI, g 745 726 730 747 711 701 696 732 20.5 0.38 0.74 0.65
G:F 0.645 0.692 0.666 0.683 0.658 0.676 0.681 0.688 0.011 0.52 0.07 0.001
BW, kg             
d 0 5.71 5.70 5.73 5.68 5.71 5.75 5.71 5.71 0.05 0.59 0.24 0.43
d 7 6.84 6.76 6.79 6.81 6.80 6.89 6.83 6.83 0.19 0.67 0.91 0.85
d 21 11.93 11.86 11.95 12.00 11.67 11.55 12.01 12.09 0.32 0.54 0.14 0.94
d 35 19.78 20.64 20.05 20.59 19.44 19.57 19.57 20.38 0.36 0.14 0.37 0.04
  1. aA total of 320 weanling pigs (PIC 1050 barrows, initially 5.71 ± 0.05 kg and 21 d of age) were used in a 35-d trial with 8 pens per treatment. Phase 1, 2, and 3 diets were fed from d 0 to 7 (SID Lys 1.35 vs 1.55%), 7 to 21 (SID Lys 1.15 vs 1.35%), and 21 to 35 (SID Lys 1.45 vs 1.25%) after weaning, respectively. There were no interactions among the different phases. Nemecheck et al. [19].