260 The Effect of Different Bones and Analytical Methods on Assessment of Bone Mineralization Response to Dietary P, Phytase, and Vitamin D in Finishing Pigs. (21st September 2022)

• Record Type: Journal Article
• Authors: Williams, Hadley; Gebhardt, Jordan T; Tokach, Mike D; Woodworth, Jason C; DeRouchey, Joel M; Goodband, Robert D; Bergstrom, Jon R; Hastad, Chad W; Post, Zach; Rahe, Michael; Siepker, Christopher; Sitthicharoenchai, Panchan; Ensley, Steve
• Is Part Of: Journal of animal science. Volume 100(2022)Supplement 3
• Page Start: 113
• Page End: 114
• Publication Date: 2022-09-21
• Subjects: bone mineralization -- finishing pigs -- growth performance; Livestock -- Periodicals; Livestock; Electronic journals; Periodicals; 636.005
• DOI: 10.1093/jas/skac247.218
• Languages: English
• ISSNs: 0021-8812

Abstract

Abstract: Pigs [n = 882; initial body weight (BW) of 33.2±0.31 kg] were used to evaluate the effects of different bones and analytical methods on assessment of bone mineralization response to dietary P, phytase, and vitamin D in growing-finishing pigs. Pens of pigs (20 pigs/pen) were completely randomized to 5 dietary treatments with 9 pens/treatment. After feeding diets for 112-d, nine pigs/treatment were harvested for bone analysis. Treatments were: 1) P at 80% of the NRC STTD P (deficient), 2) NRC STTD P using monocalcium phosphate, 3) NRC STTD P including phytase, 4) Industry P using monocalcium phosphate and phytase, 5) diet 4 with additional 2, 000 IU/kg 25(OH)D3 (HyD). All diets contained vitamin D at 1, 653 IU/kg. There were no significant differences for final BW, ADG, ADFI, G:F (P>0.10) or non-de-fat bone ash (bone ash×bone interaction, P>0.10). The response to treatment for bone density (Archimedes principle) and bone mineral content (DEXA) tended to depend on the bone (density×bone interaction, P=0.053; mineral density×bone interaction, P=0.157). There were no treatment differences (P>0.10) for bone density and bone mineral density between metacarpals, fibulas, and 2 nd ribs. For 10th ribs, pigs fed industry levels of P had increased (P< 0.05) bone density compared with pigs fed NRC levels with phytase, with pigs fed deficient P, NRC P with no phytase, and excess vitamin D from HyD being intermediate. Pigs fed diets supplemented with HyD had increased bone mineral density in 10 th ribs compared with pigs fed NRC levels of P with phytase, with pigs fed P deficient diets, industry P without HyD, and NRC P with monocalcium being intermediate. In summary, bone density and bone mineral content responses varied depending on the bone. Differences in bone density and mineral content in response to vitamin D and P were most apparent with the 10 th ribs.