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Table.4 Effect of dietary calcium (Ca) level on serum parameters and tibia ALP activities of broilers on d 211

From: Dietary calcium requirements of broilers fed a conventional corn-soybean meal diet from 1 to 21 days of age

Analyzed dietary Ca level, % Serum Ca content, mg/100 mL Serum inorganic P, mg/100 mL Serum Ca:inorganic P ratio Serum ALP Activity, King unit/100 mL Tibia ALP Activity, King unit/g prot
0.59 8.63 6.22 1.39 312cd 384a
0.70 8.65 7.09 1.23 380bc 350ab
0.80 8.21 6.78 1.22 304cd 271c
0.88 8.50 7.14 1.19 345bcd 305bc
0.98 8.95 6.92 1.30 294d 340ab
1.09 8.63 6.81 1.27 396b 348ab
1.18 8.76 6.36 1.39 486a 355ab
SEM 0.553 0.534 0.133 51.9 57.1
P-value
 Ca level 0.43 0.06 0.08 < 0.0001 0.04
 Linear 0.0003 0.82
 Quadratic 0.002 0.005
  1. 1Data represented the means of 6 replicates (n = 6)
  2. 2Abbreviation: ALP alkaline phosphatase
  3. a-dMeans within a column with unlike superscript letters were significantly different (P < 0.05)