Open Access71 The Effect of Different Bones and Analytical Method on Assessment of Bone Mineralization Response to Dietary P, Phytase and Vitamin D in Nursery Pigs
Author(s) -
H. E. Williams,
Taylor Chin,
Jordan T Gebhardt,
Mike D Tokach,
Jason C Woodworth,
Joel M. DeRouchey,
Robert D. Goodband,
J. R. Bergstrom,
Michael C. Rahe,
Christopher Siepker,
Panchan Sitthicharoenchai
Publication year - 2022
Publication title -
journal of animal science/journal of animal science ... and asas reference compendium
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 156
eISSN - 1525-3015
pISSN - 0021-8812
DOI - 10.1093/jas/skac064.040
Subject(s) - monocalcium phosphate , bone ash , zoology , phytase , medicine , chemistry , phosphate , bone mineral , endocrinology , randomized block design , phosphorus , vitamin , bone density , calcium , osteoporosis , biochemistry , biology , agronomy , organic chemistry , fishery , fish <actinopterygii> , fish meal
Three hundred-fifty pigs (initially 11.9±0.56 kg) were used to evaluate effects of different bones and analytical methods on assessment of bone mineralization response to dietary P and vitamin D in nursery pigs. Pens of pigs (5 pigs/pen) were randomized to 6 dietary treatments in a randomized complete block design with 10 pens/treatment. After feeding diets for 28-d, 8 pigs/treatment were harvested for bone analysis. Treatments were: 1) P at 0.19% STTD P (deficient), 2) P at 0.33% STTD P (NRC requirement) using monocalcium phosphate, 3) P at 0.33% STTD P including phytase, 4) P at 0.44% STTD P (industry level) using monocalcium phosphate, phytase, no vitamin D, 5) diet 4 with vitamin D (1,653 IU/kg), 6) diet 5 with additional 2,000 IU/kg 25(OH)D3 (HyD). Final BW, ADG, and ADFI increased linearly (P < 0.05) and G:F improved (quadratic, P < 0.05) as P increased. The response to treatment for bone density and ash was dependent upon bone (density×bone interaction, P = 0.044; non-defatted bone ash×bone interaction, P = 0.060; defatted bone ash×bone interaction, P = 0.068). Pigs fed 0.19% STTD P had decreased (P < 0.05) bone density and ash (non-defatted and defatted) for all bones compared with 0.44% STTD P, with 0.33% STTD P generally intermediate or similar to 0.44% STTD P. Pigs fed 0.44% STTD P with no vitamin D had greater (P < 0.05) non-de-fatted fibula ash compared with all treatments other than 0.44% STTD P with added HyD. Pigs fed the 3 diets with 0.44% STTD P had greater (P < 0.05) de-fatted 2nd rib ash compared with pigs fed 0.19% STTD P or 0.33% STTD P with no phytase. In summary, bone density and ash responses varied depending on bone. Differences in bone density and ash in response to vitamin D and P were most apparent with fibulas and 2nd ribs.