Table 3.

Effects of feeding RSC containing high GLS on the plasma biochemical parameters in steers.

Item	Dietary levels of RSC, % DM				SEM	P-value
	0	2.7	5.4	8.0		Ration	Linear	Quadratic
Nutrients
TP, g/L	54.24	52.85	52.93	51.78	3.93	0.819	0.382	0.948
ALB, g/L	16.98	16.78	17.22	16.42	0.662	0.659	0.554	0.515
Urea, mmol/L	1.75	1.78	1.83	1.75	0.172	0.947	0.930	0.631
Glucose, mmol/L	3.61	3.53	3.45	3.60	0.178	0.707	0.839	0.301
TC, mmol/L	1.25	1.36	1.47	1.39	0.162	0.265	0.155	0.246
Triglyceride, mmol/L	0.731	0.671	0.735	0.657	0.048	0.403	0.389	0.825
Hormones
T3, ng/mL	1.10	1.01	1.06	1.23	0.11	0.592	0.399	0.268
T4, ng/mL	53.18	52.85	54.44	55.72	2.68	0.721	0.302	0.678
Antioxidant
T-AOC, U/mL	11.54	11.48	13.84	13.83	1.68	0.353	0.120	0.985
GLS metabolites
SCN, μmol/L	0.00a	24.48b	61.72c	87.07d	4.83	<0.001	<0.001	0.919
Goitrin, μmol/L	ND	ND	ND	ND	–	–	–	–
ITC, μmol/L	ND	ND	ND	ND	–	–	–	–

RSC = rapeseed cake; GLS = glucosinolates; TP = total protein; ALB = albumin; TC = total cholesterol; T₃ = triiodothyronine; T₄ = thyroxine; T-AOC = total antioxidant capacity; SCN = thiocyanate; ND = undetectable; ITC = isothiocyanate.

^a-d Means in the same row with different superscripts differ (P < 0.05, n = 8).