Table 7.

Length and width of the proximal epiphysis and width of the distal epiphysis of the tibia of broiler at 42 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
Length (mm)	0	102.50	104.83	103.25	ns	103.53	0.59	ns	Q45(0.0320)	ns
	0.05	102.83	104.77	102.65	ns	103.42
	0.10	103.00	106.33	102.83	ns	104.06
	Regression	ns	ns	ns
	Mean	102.78	105.31	102.91
Width of the proximal epiphysis (mm)	0	30.45	30.15	30.45	ns	30.35	0.19	ns	ns	0.0133
	0.05	30.72	31.07	30.25	Q46(0.0085)	30.68
	0.10	30.66	31.00	30.45	ns	30.70
	Regression	ns	ns	ns
	Mean	30.61	30.74	30.38
Width of the distal epiphysis (mm)	0	18.44	19.83	20.41	L49(<0.0001)	19.56	0.15	ns	ns	<0.0001
	0.05	18.53	20.42	20.08	Q50(0.0013)	19.68
	0.10	19.28	20.35	20.02	Q51(0.0036)	19.88
	Regression	L47(0.0184)	Q48(0.0485)	ns
	Mean	18.75	20.20	20.17

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; Q: significant quadratic regression.

⁴⁵Leght 42 d = −109.56 GLU² + 33.3 GLU + 102.78; R² = 0.99.

⁴⁶Width of the proximal epiphysis 42 d _{0.05% CO} = −26 GLU² + 6.2333 GLU + 30.72; R² = 0.99.

⁴⁷Width of the distal epiphysis 42 d _{0% GLU} = 8.4 CO + 18.33; R² = 0.83.

⁴⁸Width of the distal epiphysis 42 d _{0.15% GLU} = −132 CO² + 18,4 CO + 19,83; R² = 0,99.

⁴⁹Width of the distal epiphysis 42 d _{0% CO} = 6.5667 GLU + 18.575; R² = 0.95.

⁵⁰Width of the distal epiphysis 42 d _{0.05% CO} = - 49.556 GLU² + 20.033 GLU + 18.53; R² = 0.99.

⁵¹Width of the distal epiphysis 42 d _{0.10% CO} = −31.111 GLU² + 11.8 GLU + 19.28; R² = 0.99.