Table 7.

Effects of Forsythia suspensa extract on nitrogen and phosphorus excretion in feces of broilers (g/kg, DM-basis).

Item	CTL1	CTC1	FSE1	SEM	P-value
Days 1 to 21
Nitrogen	400.64	388.09	396.58	16.69	0.87
Phosphorus	105.78	104.00	100.83	3.63	0.63
Days 22 to 42
Nitrogen	170.87a	148.66a,b	138.28b	7.02	0.03
Phosphorus	45.08a	39.81a,b	35.13b	1.35	<0.01

^a,bDifferent superscripts within a row indicate a significant difference (P < 0.05).

¹CTL: control; CTC: chlortetracycline; FSE: Forsythia suspensa extract.