Table 4.

Effects of curcumin on blood indexes of diquat-challenged broilers.

Items	Control group	DQ1	The amount of curcumin			SEM2	P value
			50 mg/kg	100 mg/kg	150 mg/kg		ANOVA	Linear	Quadratic
ALT3 (U/L)	6.42*	7.43b	7.41ab	6.63a	6.49a	0.13	0.044	0.005	0.809
AST4 (U/L)	42.24*	49.21	47.71	44.86	45.98	0.76	0.220	0.071	0.362
TB5 (μmol/L)	4.72*	15.07b	8.28a	5.73a	6.81a	0.74	<0.001	<0.001	0.001
TP6 (g/L)	30.59	34.45b	34.00b	29.06ab	27.49a	0.86	0.037	0.005	0.567
Albumin (g/L)	15.82	18.07	16.56	15.60	15.90	0.37	0.870	0.025	0.217
Glucose (mmol/L)	14.31	16.61	15.22	14.88	15.37	0.44	0.546	0.313	0.279
Total cholesterol (mmol/L)	5.66	6.26	5.52	5.39	5.98	0.18	0.273	0.536	0.063
Triglyceride (mmol/L)	0.53*	0.68b	0.65ab	0.60ab	0.56a	0.02	0.046	0.023	0.996

^⁎There was significant difference (P < 0.05) between the control and DQ groups.

^a,bWithin a row, means with different superscripts differ significantly (P < 0.05). Values are means (n = 8).

^1–6DQ, diquat group; SEM, the standard error of the means; ALT, alanine aminotransferase; AST, aspartate aminotransferase; TB, total bilirubin; TP, total protein.