Table 2. Effects of dietary protease on growth performance of weaned pigs¹⁾

Item	Dietary treatments			SEM	p-value2)
	PC	NC	PR		Diet	PC vs. NC	PC vs. PR	NC vs. PR
Day 1 to 7
Initial BW (kg)	7.01	7.03	7.13	0.09	0.597	0.892	0.356	0.428
Final BW (kg)	7.85	7.47	8.30	0.17	0.018	0.145	0.093	0.005
ADG (g/d)	120.11	63.51	167.20	22.87	0.024	0.100	0.171	0.008
ADFI (g/d)	334.80	321.27	339.14	25.69	0.878	0.716	0.907	0.632
G:F (g/g)	0.359	0.198	0.493	0.08	0.100	0.279	0.242	0.036
Day 8 to 14
Initial BW (kg)	7.85	7.47	8.30	0.17	0.018	0.145	0.093	0.005
Final BW (kg)	9.82	9.29	10.12	0.31	0.207	0.254	0.512	0.086
ADG (g/d)	281.27	259.18	260.63	35.21	0.885	0.665	0.686	0.977
ADFI (g/d)	502.29	433.79	481.31	32.47	0.344	0.162	0.656	0.321
G:F (g/g)	0.560	0.597	0.541	0.06	0.862	0.714	0.875	0.602
Day 1 to 14
Initial BW (kg)	7.01	7.03	7.13	0.09	0.597	0.892	0.356	0.428
Final BW (kg)	9.82	9.29	10.12	0.31	0.207	0.254	0.512	0.086
ADG (g/d)	200.69	161.35	213.91	21.80	0.247	0.226	0.676	0.114
ADFI (g/d)	418.54	377.53	410.23	25.18	0.497	0.272	0.819	0.377
G:F (g/g)	0.480	0.427	0.521	0.05	0.617	0.577	0.677	0.337
Day 15 to 21
Initial BW (kg)	9.82	9.29	10.12	0.31	0.207	0.254	0.512	0.086
Final BW (kg)	12.63	11.23	12.66	0.44	0.071	0.048	0.957	0.043
ADG (g/d)	400.79	277.82	362.74	26.42	0.018	0.007	0.329	0.042
ADFI (g/d)	763.67	804.40	693.09	93.79	0.705	0.764	0.604	0.418
G:F (g/g)	0.525	0.345	0.523	0.04	0.049	0.035	0.916	0.043
Day 1 to 21
Initial BW (kg)	7.01	7.03	7.13	0.09	0.597	0.892	0.356	0.428
Final BW (kg)	12.63	11.23	12.66	0.44	0.071	0.048	0.957	0.043
ADG (g/d)	267.39	200.17	263.52	20.33	0.066	0.038	0.895	0.048
ADFI (g/d)	533.59	519.82	504.51	38.57	0.869	0.805	0.604	0.784
G:F (g/g)	0.501	0.385	0.522	0.04	0.204	0.086	0.837	0.046
Day 22 to 42
Initial BW (kg)	12.63	11.23	12.66	0.44	0.071	0.048	0.957	0.043
Final BW (kg)	20.56	16.26	20.69	0.85	0.005	0.004	0.916	0.003
ADG (g/d)	377.51	239.33	382.05	23.46	0.001	0.001	0.894	0.001
ADFI (g/d)	963.40	924.57	912.60	107.34	0.941	0.802	0.744	0.939
G:F (g/g)	0.392	0.259	0.419	0.04	0.027	0.038	0.986	0.019
Day 1 to 42
Initial BW (kg)	7.01	7.03	7.13	0.09	0.597	0.892	0.356	0.428
Final BW (kg)	20.56	16.26	20.69	0.85	0.005	0.004	0.916	0.003
ADG (g/d)	322.45	219.75	322.79	20.16	0.005	0.004	0.991	0.004
ADFI (g/d)	748.49	722.19	708.56	60.42	0.894	0.764	0.649	0.876
G:F (g/g)	0.431	0.304	0.456	0.03	0.020	0.018	0.810	0.011

Each value is the mean of 5 replicates (5 pigs/pen).
Diet, main diet effect; PC vs. NC, effect between positive and negative controls; PC vs. PR, effect between positive control and negative control + 0.02% dietary protease; NC vs. PR, effect between negative control and negative control + 0.02% dietary protease.
PC, positive control with required level of protein; NC, negative control with low level of protein; PR, negative control + 0.02% dietary protease; BW, body weight; ADG, average daily gain; ADFI, average daily feed intake; G:F, gain to feed ratio; SEM, standard error of means.