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Table 2 Chemical characteristics, pH, and products of silage fermentation of Elodea silages without and with addition of WS

From: Mixed silage of Elodea and wheat straw as a substrate for energy production in anaerobic digestion plants

Silage TS
(%)
VS
(% TS)
LA
(%TS)
AA1
(%TS)
BA2
(%TS)
pH
EN 6.7 ± 0.1 63.5 ± 1.0 0.0b 7.5a 2.1a 6.5a
ESC1 25.9 ± 0.9 90.0 ± 0.5 0.5a, b 4.4b 0.0b 5.4c
ESC2 49.9 ± 0.2 90.7 ± 0.4 1.1a, b 1.5c 0.0b 5.8b
ESG1 25.7 ± 0.3 81.4 ± 0.9 0.0b 3.0b, c 0.0b 5.6b
ESG2 56.7 ± 0.8 92.0 ± 0.6 1.9a 1.8c 0.0b 4.9d
S.E. (n = 3)   1.04 2.54 1.16 0.55
Pz    * n.s. n.s. **
Pz × Sb    * n.s. n.s. **
Moisture content   *** n.s. n.s. **
EN biomass    n.s. *** ** ***
WS    * n.s. n.s. **
  1. Different superscript letters in the same column indicate significant difference at p < 0.05
  2. TS total solid, VS volatile solid, LA lactic acid, Pz straw particle size effect, Pz × Sb interaction particle size × substrate, EN E. nuttallii biomass effect, WS wheat straw biomass effect, n.s. not significant
  3. *p < 0.05, **p < 0.01, ***p < 0.001
  4. 1AA acetic acid—sum of acetic acid and propionic acid
  5. 2BA butyric acid—sum of isobutyric, n-butyric, isovaleric, n-valeric, and n-caproic acid