Table 2.

Composition analysis including percent dry matter loss (DML) and organic acid production for corn stover after anaerobic storage by ensiling and the modified-Ritter method as well as field and aerobic storage.

			Organic acids (% of biomass)
Sample description	DML (%)	pH	Lactic	Acetic	Butyric	Propionic	Succinic	Formic
Ensiled	5.75 (1.04)	4.62 (0.04)	3.1 (0.07)	0.86 (0.07)	BD	0.78 (0.10)	0.54 (0.02)	0.003 (0.00)
Modified-Ritter	9.89 (0.61)	5.18 (0.03)	BD	5.41 (0.02)	1.45 (0.02)	0.09 (0.02)	0.02 (0.002)	BD
Aerobic, 0.5 L/min	32.10 (1.54)	5.91 (0.04)	0.58 (0.04)	0.86 (0.05)	0.87 (0.06)	2.10 (0.14)	1.73 (0.11)	0.07 (0.005)
Aerobic, 1 L/min	29.52 (5.33)	6.46 (0.43)	0.41 (0.13)	0.80 (0.05)	0.41 (0.41)	1.10 (0.89)	0.96 (0.61)	0.05 (0.02)
Field stored	4.36 (3.25)	4.92 (0.17)	0.51 (0.26)	0.46 (0.05)	0.34 (0.14)	1.14 (0.24)	0.79 (0.24)	0.28 (0.06)

Values represent means with one standard deviation in parentheses. Not shown are organic acids (valeric, 2-methylbutyric, isobutyric, and isovaleric acid) below detection levels in the samples.

DML, dry matter loss; BD, below detection.