Table 7. Effect of supplemental protease on odor emission with different CP levels in weaned pig.

Variables	Basal1)		Low		SE	CP		PT2)		p-value
	0%	0.1%	0%	0.1%		HP	LP	0	10	CP	PT	CP × PT
NH3 (ppm)	11.67	10.50	11.83	11.50	0.81	11.09	11.67	11.75	11.00	0.367	0.481	0.614
H2S (ppm)	7.33	3.00	1.67	1.83	0.83	5.17	1.75	4.50	2.42	0.001	0.021	0.014

Basal, diet containing 18.78% CP; Low, diet containing 16.92% CP.
PT0, non-supplementation of protease; PT10, supplementation of 0.1% protease.
CP, crude protein; PT, protease; PT, protease; HP, high protein; LP, low crude protein.