There is growing evidence that requirements
for particular AA increase when pigs are kept
under low sanitary conditions. The extent to which reduction
in growth performance is related to these increased
requirements is unclear. To evaluate this relationship,
an experiment (2 × 2 × 2 factorial arrangement) was
performed with 612 male pigs (9 per pen) kept under
low sanitary conditions (LSC) or high sanitary conditions
(HSC) and offered ad libitum access to either a
normal CP concentration diet (NP; 17, 15, and 15% CP
for the starter, grower, and finisher phase, respectively)
or a low CP concentration diet (LP; 20% CP reduced
relative to NP for each phase), each of which containing
a basal AA profile (AA-B) or a supplemented AA profile
(AA-S). The supplemented diet type contained 20%
more Met, Thr, and Trp relative to Lys on an apparent
There is growing evidence that requirementsfor particular AA increase when pigs are keptunder low sanitary conditions. The extent to which reductionin growth performance is related to these increasedrequirements is unclear. To evaluate this relationship,an experiment (2 × 2 × 2 factorial arrangement) wasperformed with 612 male pigs (9 per pen) kept underlow sanitary conditions (LSC) or high sanitary conditions(HSC) and offered ad libitum access to either anormal CP concentration diet (NP; 17, 15, and 15% CPfor the starter, grower, and finisher phase, respectively)or a low CP concentration diet (LP; 20% CP reducedrelative to NP for each phase), each of which containinga basal AA profile (AA-B) or a supplemented AA profile(AA-S). The supplemented diet type contained 20%more Met, Thr, and Trp relative to Lys on an apparent
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