Table 5.

Effects of dietary supplementation with combination of zeolite and attapulgite (ZA) on antioxidant capacity, SIgA concentration in the jejunal mucosa and serum DAO activity of broiler chickens in experiment 1 and 2

Items	Age (d)	Control	Treatment	p value
Experiment 1
CAT (U/mg protein)	21	0.60±0.04	0.76±0.04	0.012
	42	0.75±0.07	1.25±0.14	0.035
MDA (nmol/mg protein)	21	0.41±0.02	0.32±0.02	0.012
	42	0.45±0.03	0.35±0.03	0.026
SIgA (μg/mg protein)	21	2.34±0.04	3.48±0.05	0.001
	42	1.83±0.05	3.02±0.04	0.001
DAO (U/L)	21	10.45±1.01	9.31±1.09	0.462
	42	14.87±0.79	11.34±0.61	0.003
Experiment 2
MDA (nmol/mg protein)	21	0.53±0.04	0.25±0.03	0.005
	42	0.65±0.03	0.54±0.04	0.043
CAT (U/mg protein)	21	0.53±0.05	0.98±0.08	0.043
	42	0.91±0.04	1.35±0.07	0.032
DAO (U/L)	21	8.56±1.34	7.96±0.64	0.088
	42	15.55±1.38	13.00±0.54	0.096

CAT, catalase; MDA, malondialdehyde; SIgA, secretory immunoglobulin A; DAO, diamine oxidase.