Table 4.

Effects of dietary supplementation of protease on the apparent total tract digestibility (%) of weaned piglets.

Item	PC	NC	Protease supplementation, mg/kg NC diet as fed basis
			100	200	300
Dry mater	89.67 ± 2.15	87.40 ± 3.27	86.92 ± 1.78	89.29 ± 2.21	88.61 ± 2.35
Gross energy	88.50 ± 2.66	86.27 ± 2.45	86.73 ± 1.99	87.95 ± 3.09	88.07 ± 1.86
Crude protein	87.19 ± 1.94a	80.23 ± 2.65b	83.59 ± 2.17ab	87.66 ± 2.86a	86.85 ± 3.14a

PC = positive control diet; NC = negative control diet.

^a,b Within a row, means without a common superscript differ significantly (P < 0.05), n = 6.