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Effects of Increasing Copper from Either CuSO4 or Combinations of CuSO4 and a Cu-Amino Acid Complex on Growth Performance and Carcass Characteristics of Finishing Pigs
Effects of Increasing Copper from Either CuSO4 or Combinations of CuSO4 and a Cu-Amino Acid Complex on Growth Performance and Carcass Characteristics of Finishing Pigs
Tuesday, March 14, 2017: 8:45 AM
201 (Century Link Center)
A total of 1,089 pigs (PIC 280×1050; initially 37.3 kg) were used in a 105-d growth study to determine the effects of increasing added Cu from either CuSO4 (Prince Agri-Products, Quincy, IL) alone or a 50/50 blend of CuSO4 and Cu-AA complex (Availa®-Cu, Zinpro Corporation, Eden Prairie, MN) on growth performance and carcass characteristics of finishing pigs. Treatments were fed in 5 phases (27 to 45, 45 to 61, 61 to 77, 77 to 104 and 104 to 127 kg BW) and consisted of a control diet with 17 ppm Cu from CuSO4 from the trace mineral premix or the control plus added CuSO4 to provide 70 and 130 ppm total Cu or a 50/50 blend of CuSO4 and Cu-AA to provide 70, 100, and 130 ppm total Cu. There were 25 or 26 pigs/pen and 7 replicates/ treatment. Overall, added Cu above 17 ppm did not influence ADG; however, pigs fed 70 and 130 ppm added Cu from the 50/50 blend of CuSO4 and Cu-AA had decreased (P=0.045) ADFI but G:F tended (P=0.051) to be improved compared with those fed 70 and 130 ppm of added Cu from CuSO4 only. Similar to the G:F response, pigs fed diets that contained CuSO4 alone had poorer (P=0.033) carcass G:F than those fed added Cu from the 50/50 blend of CuSO4 and Cu-AA. Carcass characteristics were not influenced. In conclusion, these data suggest pigs fed diets that contained added Cu from CuSO4 alone consume more feed but have poorer G:F on a live and carcass basis compared to those fed a 50/50 blend of CuSO4and Cu-AA. Increasing Cu did not affect growth performance in this study.
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Total Cu, ppm |
|
|
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Control |
CuSO4 |
CuSO4/Cu-AA |
|
Probability, P< |
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Item1 |
17 |
70 |
130 |
70 |
100 |
130 |
SEM |
Cu Source |
|
ADG, kg |
0.87 |
0.88 |
0.89 |
0.89 |
0.89 |
0.87 |
0.010 |
0.573 |
|
ADFI, kg |
2.43 |
2.46 |
2.47 |
2.44 |
2.46 |
2.38 |
0.029 |
0.045 |
|
G:F |
0.358 |
0.359 |
0.360 |
0.363 |
0.362 |
0.368 |
0.0030 |
0.051 |
|
HCW, kg |
93.04 |
93.84 |
93.89 |
93.72 |
94.73 |
92.92 |
1.353 |
0.547 |
|
Carcass G:F |
0.259 |
0.260 |
0.259 |
0.264 |
0.263 |
0.266 |
0.0025 |
0.033 |
|
1No effect of Cu level: linear P>0.125 and quadratic P>0.205 |
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