Table 10.

Percentage of calcium and phosphorus in the tibia ashes of broilers at 21 d of age, supplemented with chondroitin and glucosamine sulfates in the diet.

Evaluated characteristics	Chondroitin1 (CO, %)	Glucosamine2 (GLU, %)			Regression	Mean	SEM	Probability
		0	0.15	0.30				CO	GLU	CO × GLU
Calcium (%)	0	36.44	36.72	36.96	ns	36.72	0.28	ns	L68 (<0.0009)	ns
	0.05	35.50	37.14	37.31	ns	36.65
	0.10	37.13	37.10	37.35	ns	37.19
	Regression	ns	ns	ns
	Mean	36.35	36.99	37.21
Phosphorus (%)	0	17.27	17.62	17.67	ns	17.52	0.25	ns	L69 (<0.0007)	ns
	0.05	17.57	17.24	18.03	ns	17.61
	0.10	17.59	18.15	17.90	ns	17.88
	Regression	ns	ns	ns
	Mean	17.48	17.67	17.87

¹[(C₁₄H₂₁NO₁₄S)n, Biofac A/S] purity of 91.27%.

²[(C₆H₁₄NO₅)2SO₄ × 2KCl, Zhejiang Golden-Shell Pharmaceutical Co. Ltd.] sulfate content: 16%.

SEM: standard error of the mean; ns: not significant; L: significant linear regression.

⁶⁸Calcium 21 d = 2.8667 GLU + 36.42; R² = 0.93.

⁶⁹Phosphorus 21 d = 1.3 GLU + 17.478; R² = 0.99.