442 Effects of added 25(OH)D3 with varying standardized total tract digestible phosphorus levels on nursery pig performance, bone and urine characteristics, and serum vitamin D
IF 2.7 2区 农林科学Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Larissa L Becker, Jordan T Gebhardt, Mike D Tokach, Robert D Goodband, Joel M DeRouchey, Jason C Woodworth, Jon R Bergstrom
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引用次数: 0
Abstract
Pigs [n = 360; DNA 600×241; initial body weight (BW) = 5.8 ± 0.54 kg] were used in a 45-d study to evaluate effects of added 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 status. Pigs were weaned at approximately 19 d of age and randomly allotted to 6 treatments with 5 pigs/pen and 12 replications/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 on a dietary percentage basis). Diets were corn-soybean meal-based and fed in 3 phases. On d 45, 1 pig/pen was euthanized to collect right fibula, metacarpal, and 2nd and 10th ribs. Overall, increasing STTD P increased (quadratic, P < 0.003) BW, ADG, ADFI, and G/F with minimal improvement above 100% of NRC STTD P requirement. Added 25(OH)D3 had no effect on growth performance (P > 0.10). Pigs fed increasing STTD P had decreased urinary Ca concentration (linear, P < 0.001 and quadratic, P = 0.078) and increased urinary P concentration (quadratic, P < 0.001), with all pigs fed 70% of NRC STTD P requirement having non-detectable levels of urinary P. Added 25(OH)D3 had no effect on urinary Ca and P concentration (P > 0.10). A quadratic 25(OH)D3×STTD P interaction (P = 0.032) was observed for serum 25(OH)D3. When pigs were fed 25(OH)D3, serum 25(OH)D3 increased as STTD P increased (quadratic, P = 0.005) but no differences were observed when no 25(OH)D3 was added and STTD P increased. A quadratic 25(OH)D3×STTD P interaction was observed for serum 1,25(OH)2D3 concentrations (P = 0.002). When pigs were fed 25(OH)D3, serum 1,25(OH)2D3 decreased (quadratic, P < 0.001) as STTD P increased but the decrease was not significant when no 25(OH)D3 was fed. Added 25(OH)D3 had no effect (P > 0.10) on serum 1,25(OH)2D3, but concentrations decreased (quadratic, P = 0.001) as STTD P increased. No added 25(OH)D3×STTD P interaction was observed for 24,25(OH)2D3. Serum 24,25(OH)2D3 increased (P < 0.001) with added 25(OH)D3. Metacarpal bone density increased (linear, P = 0.001) as STTD P increased, as did fibulas and ribs (quadratic, P ≤ 0.055). Percentage bone ash and bone ash weight increased (quadratic, P ≤ 0.065) for all bones as STTD P increased. Added 25(OH)D3 had no effect on bone density or bone ash weight for any bones (P > 0.10); however, the reduction in bone ash observed with reducing STTD P level tended to be less when 25(OH)D3 was provided (linear interaction, P = 0.098). In summary, added 25(OH)D3 had limited effect on growth performance, urine parameters, or bone characteristics; however, added 25(OH)D3 increased serum concentrations of 25(OH)D3 and 24,25(OH)2D3. Increasing STTD P to 100% of NRC requirement estimate increased growth and 130% of NRC maximized bone ash. 5634 Table.pdf
期刊介绍:
The Journal of Animal Science (JAS) is the premier journal for animal science and serves as the leading source of new knowledge and perspective in this area. JAS publishes more than 500 fully reviewed research articles, invited reviews, technical notes, and letters to the editor each year.
Articles published in JAS encompass a broad range of research topics in animal production and fundamental aspects of genetics, nutrition, physiology, and preparation and utilization of animal products. Articles typically report research with beef cattle, companion animals, goats, horses, pigs, and sheep; however, studies involving other farm animals, aquatic and wildlife species, and laboratory animal species that address fundamental questions related to livestock and companion animal biology will be considered for publication.