Table 3. Effects of dietary Cu concentrations and sources on Cu concentration in liver, serum, and excreta in broiler chickens

Serum (ng/dL) Liver (mg/kg) Excreta (mg/kg)
14 d 35 d
Cu source × Concentration
 INO (ppm) 16 7.6 9.5 1.77 34.20
40 9.8 9.9 1.78 64.50
80 10.8 9.4 1.87 140.30
120 9.5 10.3 2.14 162.97
 HME (ppm) 16 12.0 12.4 1.93 26.93
40 11.6 12.3 2.01 52.22
80 11.5 10.4 1.84 123.57
120 9.2 13.3 1.73 141.63
 Pooled SEM 0.50 0.42 0.04 11.46
Contrast
 INO vs HME 0.137 0.007 0.201 0.038
 Effect of INO level
  Linear 0.743 0.586 0.008 < 0.001
  Quadratic 0.981 0.789 0.169 0.399
 Effect of HME level
  Linear 0.230 0.911 0.184 < 0.001
  Quadratic 0.539 0.225 0.435 0.067
INO, copper sulfate; HME, hot melt extrusion copper sulfate.