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Table 1 Chemical composition of whole-crop maize before and after ensiling (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, % 16.7 18.6 17.9 18.8 19.8
WSCa 14.0 0.6 8.2 23.9 22.3
   Glucose 5.7 0.6 6.5 12.1 11.3
   Fructose 8.0 X X 11.1 10.2
Glucansb 13.3 11.0 6.2 11.0 12.1
Cellulose 23.6 26.0 22.4 27.5 24.3
Arabinoxylans 17.0 17.3 16.6 17.8 18.0
Galactans 0.9 0.9 0.6 0.9 0.8
Galacturonic acid 1.7 X X X X
Lignin 14.1 15.8 14.5 15.3 15.8
Protein 10.6 10.6 10.0 10.6 10.6
Ash 8.0 7.9 7.7 7.3 7.5
  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.