Table 8.

Effects of 25-hydroxycholecalciferol supplementation on femur biomechanical parameters of broilers fed normal or low calcium and phosphorus diet.

Item	Breaking strength (N)	Failure deflection (mm)	Stiffness (N/mm)	Absorbed energy (J)
Main effect
CaP level
Normal	267	2.47	124	0.37
Low	154	2.77	63.03	0.26
25-OH-D3
−	196	2.51	86.63	0.29
+	225	2.73	99.90	0.34
SEM	14.26	0.23	11.06	0.03
P-value
CaP level	<0.001	0.218	<0.001	0.003
25-OH-D3	0.063	0.347	0.236	0.155
CaP × 25-OH-D3	0.127	0.545	0.163	0.314

Data were the means and SEM, n = 6 broilers per treatment for data on interaction effect, and n = 12 broilers per treatment for data on main effect.

Abbreviation: 25-OH-D₃, 25-hydroxycholecalciferol.