Summary and Implications
Interest in organic mineral sources continues in the pig industry. In this experiment, a zinc amino acid complex was evaluated in a total of 528 pigs, assigned to 48 pens and to one of 4 dietary treatments: A) 50 ppm zinc above that provided in the trace mineral premix as ZnSO4 during phases 1 through 5; in phase 5, ractopamine was included at 2.5 g/ton for 2 weeks, followed by 7.2 g/ton until the pigs were shipped to market, B) similar to Trt A, except ractopamine was not included in phase 5, C) similar to trt A, except that Availa-Zn 100 was fed in place of ZnSO4 in phase 1 through 5 and D) similar to Trt C except that the Availa-Zn 100 replaced ZnSO4 only in phases 3, 4 and 5. Pigs fed Trt C and D (with Paylean) grew faster than pigs fed Trt B (no Paylean) and pigs fed Trt C also grew faster than the pigs fed Trt A (P<0.05). There were no differences in feed intake among Trt B, C and D, but the pigs receiving Trt C and D (Paylean and Avail-Zn) ate more feed than the pigs receiving Trt A (Paylean but no Avail-Zn; P < 0.05) suggesting Avail-Zn mitigated reduced feed intake associated with Paylean. Trt A, C and D (with Paylean) pigs had the same feed efficiency but better feed efficiency than Trt B (no Paylean) pigs (P < 0.05). Locomotion score conducted at first pull was best for Trt B pigs (no Paylean and zinc sulphate) (P < 0.10), while Trt A pigs (Paylean and zinc sulphate) had the poorest locomotion score (P < 0.10); Trt C and D pigs (Paylean and Avail Zn) earned intermediate scores. Pigs fed Paylean (A, C and D) were leaner (P>0.10). We concluded from this experiment that zinc amino acid complex shows promise in enhancing the response of pigs to Paylean.
Iowa State University
Patience, John F. and Chipman, Amanda
"Impact of Zinc Source and Timing of Implementation on Grow-finish Performance, Carcass Composition and Locomotion Score,"
Animal Industry Report:
AS 657, ASL R2655.
Available at: http://lib.dr.iastate.edu/ans_air/vol657/iss1/79