Table 2.
Added Cu3, mg/kg | ||||||
---|---|---|---|---|---|---|
Item | Control | CuSO44 | CuSO4/Cu-AA5 | |||
17 | 70 | 130 | 70 | 100 | 130 | |
Early finishing (d 0 to 43) | 43 | 73 | 95 | 97 | 87 | 112 |
Late finishing (d 43 to 105) | 31 | 86 | 123 | 89 | 117 | 139 |
Overall (d 0 to 105) | 36 | 82 | 114 | 93 | 107 | 130 |
1Multiple samples of each diet were collected, blended, and subsampled before being analyzed at Minnesota Valley Testing Laboratory (New Ulm, MN).
2Values represent a feed intake-based weighted average of chemical Cu analysis for each treatment within early finishing (diet phases 1, 2, and 3 fed from 37 to 77 kg body weight), late finishing (diet phases 4 and 5 fed from 77 to 129 kg body weight), and overall. Permitted analytical variation for Cu analysis is 25% (AAFCO, 2018).
3The trace mineral premix was formulated to contribute 17 mg/kg of Cu from CuSO4 to the complete basal diet.
4CuSO4 = copper sulfate (Prince Agri Products, Quincy, IL). Values represent the sum of added Cu from the premix and supplemental Cu from CuSO4.
5CuSO4/Cu-AA = 50:50 blend of Cu from copper sulfate and copper–amino acid complex (Availa-Cu, Zinpro Corporation, Eden Prairie, MN). Values represent the sum of added Cu from the premix and supplemental Cu from CuSO4/Cu-AA blend.