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Table 4 Mineral concentration (dry matter) on tissues of 17 d old broiler chicks fed different copper levels and sources

From: Broiler responses to copper levels and sources: growth, tissue mineral content, antioxidant status and mRNA expression of genes involved in lipid and protein metabolism

Item Copper levels, mg/kg Source SEM1 Source Level Source × Level L2 Q3
0 4 8 12 16 Inorganic Organic
Breast muscle
  Calcium, g/kg 91.5 97.7 87.4 89.2 94.5 90.7 93.4 2.09 0.524 0.540 0.426 0.877 0.569
  Phosphorus, g/kg 9.60 9.52 9.63 9.33 9.54 9.56 9.48 64.7 0.475 0.621 0.673 0.502 0.767
  Copper, mg/kg 1.72 1.70 1.62 1.60 1.74 1.69 1.65 0.031 0.524 0.508 0.405 0.782 0.144
  Zinc, mg/kg 19.0 18.9 18.6 18.6 18.7 18.8 18.7 0.132 0.863 0.798 0.629 0.314 0.545
  Iron, mg/kg 17.5 17.7 16.6 17.1 18.9 17.7 17.5 0.307 0.736 0.164 0.554 0.271 0.067
  Manganese, mg/kg 0.575 0.593 0.714 0.620 0.650 0.624 0.637 0.022 0.762 0.315 0.960 0.272 0.275
Liver
  Calcium, g/kg 126 125 142 115 123 122 130 3.17 0.175 0.100 0.726 0.495 0.297
  Phosphorus, g/kg 9.79 9.78 9.93 9.46 9.73 9.87 0.960 0.111 0.249 0.757 0.685 0.577 0.954
  Copper, mg/kg 8.02b 8.67ab 8.71ab 8.36ab 9.15a 8.54 8.62 0.129 0.766 0.077 0.692 0.033 0.907
  Zinc, mg/kg 54.3 54.1 52.7 51.9 54.3 53.5 53.4 0.683 0.915 0.749 0.412 0.667 0.326
  Iron, mg/kg 266 267 249 253 261 287b 231a 7.88  < 0.01 0.930 0.470 0.663 0.584
  Manganese, mg/kg 8.46 8.01 7.96 7.94 8.23 7.96 8.28 0.129 0.233 0.648 0.247 0.564 0.168
Tibia
  Calcium, g/kg 144 145 147 146 148 148 144 1.30 0.199 0.847 0.834 0.261 0.949
  Phosphorus, g/kg 69.8 71.4 70.2 70.8 73.1 71.6 70.5 0.476 0.266 0.212 0.305 0.074 0.398
  Copper, mg/kg 3.90 4.04 4.02 4.03 4.09 4.01 4.02 0.027 0.806 0.300 0.621 0.064 0.594
  Zinc, mg/kg 186 184 186 185 184 181b 189a 1.61  < 0.01 0.989 0.107 0.766 0.895
  Iron, mg/kg 197 197 195 192 201 195 197 2.87 0.780 0.897 0.474 0.909 0.488
  Manganese, mg/kg 6.42 6.13 6.07 6.09 6.30 6.02b 6.38a 0.073 0.014 0.467 0.719 0.554 0.075
  1. 1Standard error of means
  2. 2Linear effect of dietary copper levels
  3. 3Quadratic effect of dietary copper levels
  4. Organic: copper proteinate (CuPro) and organic trace minerals; Inorganic: copper sulphate (CuSO4.5H2O) and inorganic trace minerals
  5. abMeans with a different superscript in a row are different (P < 0.05)