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Table 3 Volatile compounds in ensiled crops

From: Ensiling of crops for biogas production: effects on methane yield and total solids determination

Substrate n Lactic acid Ethanol Acetic acid Butyric acid Total
Maize 2 1.26 ± 0.02 0.21 ± 0.00 0.74 ± 0.04 BD 2.21 ± 0.05
Hemp 2 BD 0.29 ± 0.01 0.94 ± 0.04 0.11 ± 0.01 1.13 ± 0.04
Beets 2 0.91 ± 0.07 4.82 ± 0.86 1.09 ± 0.14 BD 6.82 ± 0.87
Beet tops 2 1.08 ± 0.04 0.53 ± 0.04 0.56 ± 0.00 BD 2.18 ± 0.06
  1. Contents of volatile compounds measured in the ensiled crops, expressed as percentage of wet weight (mean ± SD). Determinations were made in duplicate starting with the steeping step.
  2. BD, below detection limit.