Table 5.

Effect of dietary RPS supplementation on the tibia characterizes of 14 day-old meat ducks.

Item	RPS, % of diet weight				P -value
	0	6	12	24	ANOVA	Linear	Quadratic
Tibia growth
Length, mm	72.63 ± 2.46	72.62 ± 2.35	73.08 ± 2.58	73.01 ± 2.81	0.983	0.640	0.734
Diameter, mm	5.51 ± 0.27	5.57 ± 0.35	5.65 ± 0.20	5.59 ± 0.33	0.887	0.745	0.941
Fat-free weight, g	1.50 ± 0.16	1.57 ± 0.35	1.67 ± 0.17	1.76 ± 0.27	0.305	0.056	0.159
Tibia quality
Strength, N	173.08 ± 16.37b	166.01 ± 12.34b	193.52 ± 9.27a	191.17 ± 15.75a	0.015	0.012	0.040
Ash, g/g fat-free weight	0.52 ± 0.03	0.56 ± 0.05	0.58 ± 0.02	0.59 ± 0.06	0.053	0.021	0.020

^a,bMean values with different letters are significantly different by one-way analysis of variance followed by Tukey's post-hoc test (p < 0.05).