Table 5.

Major manure volatile compounds as affected by diet composition and narasin supplementation^a

Dietary treatment		Fatty acid, mmol/g wet wt				μmol/g of wet wt
Diet	Narasin	Acetic	Propionic	Butyric	Totalb	Phenolicsb	Indolesb
CSBM		64.7	9.4	6.5	87.5	1,147	21.2
DDGS		77.1	13.5	7.4	105.1	1,323	22.0
Diet P value		0.09	0.01	0.15	0.04	0.05	0.88
	No	68.6	11.1	7.3	94.0	1,266	22.8
	Yes	73.3	11.9	6.6	98.6	1,204	20.4
Narasin P value		0.51	0.39	0.29	0.58	0.49	0.66
SEM		5.0	0.7	0.5	5.9	62.9	3.91

^aInitial BW = 121.0 kg, SD = 11.5 kg; final BW = 151.0 kg, SD = 7.9 kg. Each of the 2 trials consisted of a 48-d feces and urine collection into 1 tank per pig, with 12 individually penned gilts per treatment. Diets with DDGS contained 30.34% DDGS while the narasin diets contained 30 mg narasin/kg diet.

^bVolatile fatty acids (acetate, propionate, butarate, isobutyrate, isovalerate, valerate, isocaproic, caproic, and heptanoic), phenols (phenol, cresol, ethylphenol, and propylphenol), and indoles (indole and skatol).