The Effect of Bone and Analytical Methods on the Assessment of Bone Mineralization Response to Dietary Phosphorus, Phytase, and Vitamin D in Nursery Pigs

Three hundred-fifty pigs (initially 26.2 ± 1.23 lb) were used to evaluate the effects of bone and analytical methods on assessment mineralization response dietary P vitamin D in nursery pigs. Pens (5 or 6 pigs/pen) randomized treatments a complete block design with 10 pens per treatment. Treatments formulated have varying levels P, phytase, provide differences characteristics. After feeding diets for 28 d, eight treatment euthanized bone, blood, urine analysis. The density ash was dependent upon analyzed (density × interaction, = 0.044; non-defatted 0.060; defatted 0.068). Pigs fed 0.19% STTD had decreased (P < 0.05) (non-defatted defatted) all bones compared 0.44% 0.33% generally intermediate similar P. no greater fibula other than added HyD. three 2nd rib phytase. In summary, responses varied depending analyzed. Differences most apparent fibulas ribs. difference between procedures more treatments. For histopathology, 10th ribs sensitive detection lesions.