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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