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Table 3 Chemical composition of fresh faba bean before and after ensiling for 4 and 8 months without or with formic acid (0.5% of fresh material)

From: Evaluation of preservation methods for improving biogas production and enzymatic conversion yields of annual crops

Components, percentage of dry matter Fresh Ensiled without additives Ensiled with formic acid
  Month 0 Month 4 Month 8 Month 4 Month 8
Dry matter, % 24.4 24.7 25.7 25.8 24.8
WSCa 5.9 3.3 3.7 8.2 18.3
   Glucose 3.6 1.2 1.4 3.6 13.4
   Fructose 1.8 X X 2.0 2.0
   Galactose X 1.2 1.2 1.4 1.5
   Arabinose X 0.8 0.8 1.0 1.2
Glucansb 29.1 24.0 28.0 33.4 30.0
Cellulose 16.8 8.5 13.4 15.2 16.9
Arabinoxylan 8.1 8.1 6.5 7.6 7.2
Galactan 1.9 1.0 0.8 1.3 1.1
Galacturonic acid 4.3 3.7 4.2 4.1 3.1
Lignin 12.5 12.6 13.8 13.2 13.2
Protein 18.8 18.8 18.8 19.4 19.4
Ash 7.0 5.9 6.0 5.4 5.1
  1. Samples were extracted with acetone. Water-soluble carbohydrates (WSC) and fructose were determined from the filtrates of the blended crop.
  2. aNon-structural carbohydrates expressed as total monosaccharides.
  3. bGlucans from non-cellulose parts.
  4. X = < 0.5% of dry matter.