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Table 7 Effect of amount and source of dietary copper on fecal micromineral concentrations of weanling pigs (mg/kg, as air-dry basis)

From: Optimal dietary copper requirements and relative bioavailability for weanling pigs fed either copper proteinate or tribasic copper chloride

  Copper source1 Copper level, mg/kg Pooled SEM P-value
0 20 40 80 160 200 Treatment Linear Quadratic
Fecal Cu TBCC 121.30f 280.10e 415.37d 656.00c 917.14b 1353.44a 8.49 < 0.001 < 0.001 < 0.001
CuPro 121.30e 255.82d, * 362.15c, * 600.67b, * 873.10a, * 7.22 < 0.001 < 0.001 < 0.001
Fecal Zn TBCC 5720.19 5865.70 5729.98 5885.98 5786.74 5899.92 62.16 0.198 0.190 0.414
CuPro 5720.19 5928.12 5760.37 5883.88 5793.44 118.13 0.711 0.920 0.776
Fecal Fe TBCC 3058.96 3051.32 2998.86 2989.07 2953.81 3042.00 98.57 0.963 0.685 0.668
CuPro 3058.96 2963.80 2964.34 3000.19 2976.71 57.77 0.754 0.605 0.740
  1. a-f Means within a row without a common superscript letter are different (P < 0.05)
  2. * different from the corresponding TBCC group at the same supplemented copper level, P < 0.05
  3. 1TBCC tribasic copper chloride, CuPro copper proteinate