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Table 10 Multiple linear regressions of ADG, FCR, plasma enzyme activities, and jejunal Cu concentrations on daily analyzed dietary Cu intake1

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

Dependent variables

Regression equation2

R2

P-value

ADG

Y = 296.113 + 0.8916X1 + 1.63437X2

0.61

< 0.0001

FCR

Y = 1.662–0.003535X1 − 0.006068X2

0.92

< 0.0001

ALP

Y = 1.629 + 0.018343X1 + 0.028563X2

0.88

< 0.0001

CER

Y = 74.487 + 0.11645X1 + 0.306X2

0.79

< 0.0001

Cu/Zn SOD

Y = 131.045 + 0.2185X1 + 0.4489X2

0.32

0.0019

GSH-Px

Y = 724.255 + 0.6748X1 + 0.7661X2

0.86

< 0.0001

MDA

Y = 2.326–0.011156X1 − 0.014865X2

0.37

0.0005

Jejunal Cu

Y = 5.004 + 0.00168X1 + 0.00349X2

0.77

< 0.0001

  1. 1 Daily dietary analyzed Cu intake = ADFI times analyzed supplemental dietary Cu content (analyzed total Cu content – background Cu content) for each respective Cu source
  2. 2 X1 is the analyzed daily added Cu intake (mg) from tribasic copper chloride, and X2 is the analyzed daily added Cu intake (mg) from Cu proteinate
  3. ALP alkaline phosphatase, CER ceruloplasmin, Cu/Zn SOD Cu, Zn-superoxide dismutase, GSH-Px glutathione peroxidase, MDA malondialdehyde
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Journal of Animal Science and Biotechnology

ISSN: 2049-1891