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Table.5 Effect of dietary calcium (Ca) level on tibia bone parameters 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, % Tibia ash percentage, % Tibia ash Ca content, % Tibia ash P, % Tibia ash Ca: P ratio Tibia BMD, mg/cm2 Tibia BMC, g Tibia breaking strength, N
0.59 49.3bc 35.1 17.8 1.96 136bc 0.88b 98c
0.70 48.7c 35.3 17.9 1.97 133c 0.82b 109bc
0.80 50.2ab 35.6 17.9 1.98 146b 0.98ab 129ab
0.88 50.9a 35.8 18.0 1.99 158a 1.00ab 140a
0.98 50.6ab 35.3 17.9 1.97 145b 1.02ab 134ab
1.09 50.5ab 35.6 17.9 1.99 141bc 1.10a 131ab
1.18 49.4abc 35.6 17.6 2.03 142bc 0.95b 132ab
SEM 1.17 0.79 0.34 0.052 8.0 0.105 19.7
P-value
Ca level 0.004 0.73 0.40 0.45 0.0003 0.027 0.008
Linear 0.07 0.11 0.012 0.001
Quadratic 0.003 0.0006 0.052 0.012
  1. 1Data represented the means of 6 replicates (n = 6)
  2. 2Abbreviations: BMC Bone mineral content, BMD bone mineral density
  3. a-cMeans within a column with unlike superscript letters were significantly different (P < 0.05)