114 Evaluation of Selenium Source on Nursery Pig Growth Performance, Serum and Tissue Selenium Concentrations, and Serum Antioxidant Status

Abstract A total of 3,888 pigs (337×1050, PIC, Hendersonville, TN; 6.0 kg at weaning) were used in a 42-d study to determine the influence Se source on nursery pig selenium status and growth performance. At placement, pens weighed allotted 1 3 dietary treatments randomized complete block design with blocking structure including sow farm origin, date entry, average pen BW. 144 72 double-sided 5-hole stainless steel, fence-line feeders, feeder serving as experimental unit. For each feeder, contained 27 gilts other barrows. There 24 replicates per treatment. Diets fed phases, all 0.3 ppm added Se. common phase diet from sodium selenite was pelleted form for 7 d prior initiation treatment diets. Three sources [sodium selenite; yeast; hydroxy-selenomethionine (OH-SeMet)] formulate meal 2 (d 21) 21 42). During period, ADFI tended (P < 0.10) be different (107, 103, 102 g/d) selenite, yeast, OH-SeMet, respectively. From 42 (treatment period), OH-SeMet have decreased ADG had increased 0.05) serum, liver, muscle concentration compared treatments. no difference > antioxidant measured by serum GSH-Px or TBARS. In summary, greater bioavailability indicated tissue concentration; however, similar between reduce performance selenite.