Abstract #M508

Section: Swine Species
Session: Swine Species
Format: Poster
Day/Time: Monday 7:30 AM–9:30 AM
Location: Gatlin Ballroom
# M508
Effect of mineral sources on reproductive performance in sows.
Tsung-cheng Tsai*1, Gary A. Apgar2, Mark J. Estienne3, Mark Wilson4, Charles V. Maxwell1, 1University of Arkansas, Fayetteville, AR, 2Southern Illinois University, Carbondale, IL, 3Virginia Tech, Blacksburg, VA, 4Zinpro Inc, Eden Prairie, MN.

Sows (n = 245 from 3 stations) were blocked by parity [Pty 1: parity 1 ; Pty 2: parity 2 and 3; Pty 3: parity ≥4) and initial BW, and then randomly assigned to corn-SBM diets supplemented with either inorganic [IM: 120 ppm Zn (ZnO), 30 ppm Cu (CuSO4), and 50 ppm Mn (MnSO4)] or the same total level of minerals with AA complex of Zn, Cu and Mn (OM) replacing 50% of the IM in iso-mineral based diets which also provided 120, 165, 0.3, 0.3 ppm of inorganic Ca, Fe, I, and Se, respectively. Gestation (3391 kcal/kg of ME; 0.65% SID lysine) and lactation (3348 kcal/kg; 1.00% SID lysine) diets were formulated to meet 1998 NRC nutrient recommendations. Sow individual BW (at breeding, 110 d, 48 h postpartum, and weaning) and Intake (gestation: breeding to 110 d; lactation: postpartum to weaning) were collected to calculate ADG, ADFI and G:F ratio. During gestation, IM fed sows gained less weight (60.4 vs. 64.6 kg, P = 0.054), consumed less feed (263.5 vs. 264.8 kg, P = 0.047), and had lower G:F ratio (0.27 vs. 0.29, P = 0.044) than OM fed sows. In lactation, sows fed IM had higher ADFI in wk 2 (5.85 vs. 5.19 kg/d, P = 0.021), and weaned more light BW piglets per litter (<3.63 kg; 6.55 vs. 3.23%, P = 0.047) than those fed OM, whereas number born alive (11.4 vs. 10.9, P = 0.238), number weaned (10.2 vs. 9.8, P = 0.184), piglets pre-weaning ADG (0.27 vs. 0.27 kg/d, P = 0.767), and the percentage of pre-weaning mortality (13.1 vs. 12.9%, P = 0.923) were similar for IM and OM fed sows, respectively. Of all parities, the Pty 1 and 2 sows gained more BW in gestation (66.1 and 67.5 vs. 53.9 kg, P < 0.001) then Pty 3. In addition, the Pty 1 sows had lower overall lactation intake (99.0 vs. 124.7 and 126.2 kg, P < 0.001) when compared with Pty 2 and 3 sows. Sows of Pty 2 delivered 8.9% heavier average BW piglets [1.67 vs. 1.50 (Pty 1) and 1.52 (Pty 3) kg, P < 0.001), and had 11.5% higher piglet ADG [0.29 vs. 0.26 (Pty 1 and 3) kg/d, P < 0.001). Results of current study demonstrate that supplemental organic minerals improved gestation weight gain, G:F ratio, and produced more full value weaned pigs.

Key Words: organic and inorganic minerals, sow, reproductive performance