Table 3.

Effect of dietary supplementation with heat-inactivated compound probiotics on the blood biochemical parameters in yellow-feathered broilers.

Item	Treatment1
	NC	PC	BFI
Uric acid (μmol/L)
21 d	181.50 ± 14.86b	269.67 ± 35.41a	256.50 ± 33.08ab
42 d	211.33 ± 19.00	226.17 ± 32.64	172.83 ± 12.29
63 d	257.50 ± 22.55	241.67 ± 25.35	299.00 ± 29.59
Total protein (g/L)
21 d	32.87 ± 1.50	30.28 ± 0.72	30.87 ± 1.18
42 d	35.25 ± 0.81	34.95 ± 1.52	38.10 ± 3.62
63 d	37.45 ± 1.25	35.58 ± 0.99	37.03 ± 1.12
Albumin (g/L)
21 d	13.88 ± 0.44	13.57 ± 0.79	13.20 ± 0.42
42 d	15.00 ± 0.74	14.42 ± 0.78	14.25 ± 0.28
63 d	14.95 ± 0.60	14.27 ± 0.30	15.32 ± 0.40
Creatinine (μmol/L)
21 d	5.50 ± 0.50	6.00 ± 0.93	6.17 ± 1.01
42 d	5.17 ± 0.48	4.83 ± 0.54	4.17 ± 0.60
63 d	5.00 ± 0.73a	5.00 ± 0.00a	2.83 ± 0.54b
Cholesterol (mmol/L)
21 d	3.53 ± 0.22	3.48 ± 0.24	3.47 ± 0.16
42 d	3.99 ± 0.23a	3.64 ± 0.22ab	3.25 ± 0.07b
63 d	3.56 ± 0.13ab	3.11 ± 0.15b	3.84 ± 0.24a
Triglyceride (mmol/L)
21 d	0.45 ± 0.02	0.50 ± 0.04	0.47 ± 0.04
42 d	0.58 ± 0.05	0.53 ± 0.04	0.47 ± 0.01
63 d	0.52 ± 0.03	0.54 ± 0.02	0.52 ± 0.04
ALT (U/L)
21 d	2.00 ± 0.37b	3.17 ± 0.48a	2.67 ± 0.21ab
42 d	2.00 ± 0.00	2.00 ± 0.26	2.00 ± 0.26
63 d	2.00 ± 0.26b	3.17 ± 0.40a	2.00 ± 0.45b
AST(U/L)
21 d	201.50 ± 7.72	222.67 ± 7.13	211.83 ± 13.71
42 d	196.17 ± 11.95	218.17 ± 15.34	195.83 ± 3.55
63 d	214.00 ± 8.51	210.67 ± 17.69	230.33 ± 25.93

¹NC, negative control without in-feed antibiotics; PC, positive control containing 200 mg/kg of oxytetracycline calcium + 250 mg/kg of nasiheptide; BFI, compound probiotics supplementation at 500 mg/kg containing heat-inactivated Bacillus subtilis and Lactobacillus acidophilus BFI at a ratio of 1:1; ALT, alanine transaminase; AST, aspartate transaminase.

Results are shown as mean ± standard error (n = 6).

^a,bMeans in the same row with different superscripts differ (P < 0.05).