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, Larissa L Becker Department of Animal Sciences and Industry, College of Agriculture, Kansas State University , Manhattan, KS USA Search for other works by this author on: Oxford Academic Jordan T Gebhardt Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University , Manhattan, KS USA Corresponding: jgebhardt@vet.k-state.edu Search for other works by this author on: Oxford Academic Mike D Tokach Department of Animal Sciences and Industry, College of Agriculture, Kansas State University , Manhattan, KS USA Search for other works by this author on: Oxford Academic Jason C Woodworth Department of Animal Sciences and Industry, College of Agriculture, Kansas State University , Manhattan, KS USA Search for other works by this author on: Oxford Academic Robert D Goodband Department of Animal Sciences and Industry, College of Agriculture, Kansas State University , Manhattan, KS USA Search for other works by this author on: Oxford Academic Joel M DeRouchey Department of Animal Sciences and Industry, College of Agriculture, Kansas State University , Manhattan, KS USA Search for other works by this author on: Oxford Academic Jon R Bergstrom dsm-firmenich , Plainsboro, NJ USA Search for other works by this author on: Oxford Academic Christopher L Siepker Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University , Ames, IA 50011, USA Search for other works by this author on: Oxford Academic
https://orcid.org/0000-0002-6144-6714 Journal of Animal Science, skae254, https://doi.org/10.1093/jas/skae254
Published:
28 August 2024
Article history
Received:
26 June 2024
Published:
28 August 2024
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Larissa L Becker, Jordan T Gebhardt, Mike D Tokach, Jason C Woodworth, Robert D Goodband, Joel M DeRouchey, Jon R Bergstrom, Christopher L Siepker, Effects of added 25(OH)D3 with varying standardized total tract digestible phosphorus concentrations on nursery pig performance, bone characteristics, and serum vitamin D status, Journal of Animal Science, 2024;, skae254, https://doi.org/10.1093/jas/skae254
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Abstract
A total of 360 pigs (DNA 600 × 241; initially 5.8kg) were used in a 45-d growth study to evaluate the effects of adding 25(OH)D3 with three levels of standardized total tract digestible (STTD) P on nursery pig growth performance, bone and urine characteristics, and serum vitamin D. Pigs were weaned at 19 d of age and randomly allotted to 1 of 6 dietary treatments with 5 pigs per pen and 12 replications per treatment. Dietary treatments were arranged in a 2 × 3 factorial with main effects of 25(OH)D3 (0 or 50 µg/kg equivalent to 2,000 IU/kg of vitamin D3; Hy-D, dsm-firmenich, Plainsboro, NJ) and STTD P (70, 100, or 130% of the NRC (2012) requirement estimate on a dietary percentage basis). All diets contained 1,653 IU/kg of vitamin D3. On d 45, 1 pig per pen was euthanized to collect the right fibula, metacarpal, and 2nd and 10th ribs. Overall, increasing STTD P increased (quadratic, P ≤ 0.003) ADG, ADFI, and G:F with minimal improvement above 100% of the NRC STTD P requirement estimate. Added 25(OH)D3 had no effect on growth performance. Increasing STTD P decreased urinary Ca concentration (linear, P < 0.001) and increased urinary P concentration (quadratic, P < 0.001). When pigs were fed added 25(OH)D3, serum 25(OH)D3 increased (quadratic, P = 0.005) as STTD P increased but no differences were observed when 25(OH)D3 was not added and STTD P increased (25(OH)D3× STTD P interaction, P = 0.032). When pigs were fed 25(OH)D3, serum 1,25(OH)2D3 increased (quadratic, P < 0.001) as STTD P decreased but the increase was not significant when no 25(OH)D3 was fed (STTD P × 25(OH)D3 interaction, P = 0.002). Bone ash percentage and weight increased (quadratic, P ≤ 0.065) in all bones as STTD P increased. Added 25(OH)D3 had no effect on bone density or bone ash weight; however, the reduction in bone ash percentage observed with reducing STTD P level tended to be less when 25(OH)D3 was provided (linear interaction, P = 0.098). Increasing STTD P decreased the likelihood of abnormal histologic bone lesions in the 10th rib. In summary, added 25(OH)D3 had limited effect on growth performance; however, an increase in serum concentrations of 25(OH)D3 and 24,25(OH)2D3 was observed. The addition of 25(OH)D3 to P-deficient diets increased percentage bone ash. Increasing STTD P to 100% of NRC (2012) requirement estimate increased growth and 130% of NRC maximized bone ash.
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