Table 3.

Effects of dietary supplementation with combination of zeolite and attapulgite (ZA) on apparent digestibility of crude protein and gross energy of broiler chickens in experiment 2

Items (%)	Period (d)	Control	Treatment	p value
Crude protein	14–16	61.91±1.20	67.48±1.17	0.013
	35–37	61.89±2.48	67.61±2.63	0.046
Gross energy	14–16	72.37±0.10	76.37±0.36	0.001
	35–37	70.67±0.58	74.34±0.67	0.003