Table 4.

Effects of dietary Moutan cortex radicis on the growth performance in growing pigs.

Items2	Diets1				P-value	Regression analysis
	CON	LMC	MMC	HMC		Liner effect	Quadratic effect
Initial body weight, kg	6.10 ± 0.21	6.07 ± 0.18	6.10 ± 0.18	6.11 ± 0.17	0.999	0.982	0.971
Final body weight, kg	7.93 ± 0.37a	11.84 ± 0.68b	12.51 ± 0.6b	8.03 ± 0.65a	<0.01	0.464	<0.01
ADG, g/d	80.59 ± 13.70a	240.72 ± 21.85b	282.16 ± 36.13b	110.48 ± 16.70a	<0.01	0.583	<0.01
ADFI, g/d	290.21 ± 33.52a	410.28 ± 26.98b	425.98 ± 37.06b	286.86 ± 37.58a	<0.01	0.265	<0.01
F/G ratio, g/g	3.29 ± 0.29b	1.72 ± 0.07a	2.44 ± 0.78ab	2.72 ± 0.47ab	0.039	0.630	0.019

¹CON, control group, basal diet without antibiotics; LMC, the control diet + 2,000 mg/kg Moutan cortex radicis; MMC, the control diet + 4,000 mg/kg Moutan cortex radicis; HMC, the control diet + 8,000 mg/kg Moutan cortex radicis.

²ADG, average daily gain; ADFI, average daily feed intake; F:G ratio, feed-to-gain ratio.

Data are expressed as means ± SEM (n = 8). Means within a row with different superscripts are significantly different (P < 0.05).