Abstract
Three experiments were conducted to evaluate chromium picolinate (CrPic) in growing-finishing pigs. Treatments were replicated four times within each experiment with three pigs per replicate in Exp. 1 and four pigs per replicate in Exp. 2 and 3. Average initial weights were 37.8, 30.5, and 22.4 kg in Exp. 1, 2, and 3, respectively. In Exp. 1, the basal corn-soybean meal diet (B, 120% NRC Lys) was supplemented with 0, 25, 50, 100, or 200 ppb of Cr from CrPic. Daily gain was increased (Cr cubic, P < .02) and serum cholesterol decreased (Cr cubic, P < .08) by addition of CrPic. In Exp. 2, the basal diet was supplemented with 0, 100, 200, 400, or 800 ppb of Cr from CrPic. Daily gain and ADFI were decreased (Cr linear, P < .05) by CrPic. Serum cholesterol also was decreased (Cr quadratic, P < .05) by CrPic. Longissimus muscle area (LMA) and percentage of muscling (MUS) were increased (Cr quadratic, P < .01) and 10th rib fat (TRF) was decreased (Cr quadratic, P < .01) by CrPic. In Exp. 3, pigs were allotted to the following treatments: 1) B, 2) B + 1,467 ppb of picolinate (Pic), 3) B + 200 ppb of Cr from CrCl3.6H2O, 4) B + 1,467 ppb of Pic + 200 ppb of Cr from CrCl3.6H2O, 5) B + 100 ppb of Cr from CrPic, or 6) B + 200 ppb of Cr from CrPic. Longissimus muscle area and MUS were increased (P < .01) and TRF decreased (P < .01) in pigs fed CrPic but not in pigs fed CrCl3.6H2O and(or) Pic.(ABSTRACT TRUNCATED AT 250 WORDS)
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