L-ascorbyl-2-polyphosphate as a vitamin C source for segregated and conventionally weaned pigs.

摘要: We conducted two experiments to evaluate the efficacy of a stable source vitamin C for improving performance and iron status in early-weaned pigs. A preparation L-ascorbyl-2-polyphosphate (Rovimix Stay-C 25, Roche Vitamins, Ames, IA Bramus, NJ), which supplies 25% ascorbic acid activity form, served as was incorporated at dietary levels 0, 75, or 150 ppm. In Exp. 1, 72 pigs (14 +/- 2 d age 4.98 kg BW) were blocked based on initial BW penned groups three (eight pens per treatment) an off-site nursery 42 d. Phase 1 lasted from 0 14, 14 28, 3 28 after weaning. Daily gain gain:feed ratio (G/F) increased during (quadratic, P < .1 .05, respectively), (linear, .01, overall 42-d experiment .05 .1, respectively) response increasing C. At weaning, plasma .05) with C, but iron, hemoglobin, hematocrit not influenced by 2, 120 (20 7.2 five conventional system 31 consisted 7, 7 17, 17 During period ADG G/F improved .1) serum .05), unbound iron-binding capacity total decreased These results suggest that is needed first weaning when are weaned early 12 reared system. L-Ascorbyl-2-polyphosphate supplemental level 75 ppm adequate meet requirement Vitamin supplementation product will improve young high-stress postweaning may be particularly beneficial very age.