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Table 3 Effect of amount and source of dietary copper on growth performance of weanling pigs

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 5 10 20 40 80 160 200 Treatment Linear Quadratic
BW d 0, kg TBCC 7.30 7.43 7.40 7.43 7.43 7.23 7.27 7.33 0.30 0.999 0.678 0.892
CuPro 7.30 7.41 7.44 7.37 7.47 7.33 7.45 0.37 0.999 0.865 0.984
BW d 38, kg TBCC 18.66 18.83 18.91 18.95 19.48 19.82 20.88 20.87 0.83 0.362 0.003 0.013
CuPro 18.66 18.87 19.01 19.24 19.97* 21.18* 21.13 0.79 0.166 0.004 0.006
ADG, g TBCC 298.9b 300.1b 302.8b 303.2b 317.2b 331.2ab 358.1a 356.2a 7.78 0.032 0.003 < 0.001
CuPro 298.9b 301.5b 304.4b 312.4b 328.9b 364.6a, * 359.9a 6.80 0.002 < 0.001 < 0.001
ADFI, g TBCC 492.6 497.4 501.5 494.8 500.0 504.5 513.0 519.9 21.68 0.985 0.218 0.475
CuPro 492.6 494.4 492.9 497.6 502.3 518.1 513.1 10.65 0.491 0.144 0.069
FCR TBCC 1.65ab 1.66a 1.66a 1.63ab 1.58bc 1.52cd 1.43e 1.46de 0.02 <0.001 0.001 0.111
CuPro 1.65a 1.64a 1.62ab, * 1.59b, * 1.53c, * 1.42d, * 1.43d 0.01 <0.001 < 0.001 < 0.001
  1. a-d 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