## 3 Results and Discussion
### Silage Characteristics
The content of ADL was the highest in JA100 (8.1%) and decreased with the decreasing share of JA and with the increasing share of maize in the silage to 2.3% in M100. The differences were statistically significant. [PERSON] et al. [52] suggested the use of the technology of micro-aeration in order to increase degradability of lignin during which facultatively aerobic bacteria are supported, and hence the production of necessary enzymes. Conversely, the content of lipids was the highest in M100 (4.4%) and the lowest in JA100 (2.9%), with differences being statistically significant too. Thus, the Jerusalem archoke has a lower content of readily degradable substances (starch, CP and lipids) as compared with maize, and a higher content of substances that are more difficult for degradation (ADF, CF and ADL), which results in lower biogas yields [26] (Table 6). \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Variant**} & \multicolumn{2}{c}{**DM**} & \multicolumn{2}{c}{**NDF**} & \multicolumn{2}{c}{**ADF**} & \multicolumn{2}{c}{**CF**} \\ \cline{3-10}  & & **\%** & **HSD** & **\%DM \(\pm\) SD** & **HSD** & **\%DM \(\pm\) SD** & **HSD** & **\%DM \(\pm\) SD** & **HSD** \\ \hline
1 & M100 & 33.60 \(\pm\) 0.50 & A & 43.80 \(\pm\) 0.31 & A & 21.14 \(\pm\) 2.05 & C & 16.82 \(\pm\) 0.37 & D \\
2 & M70 + JA30 & 33.44 \(\pm\) 0.47 & A & 41.64 \(\pm\) 0.85 & B & 23.91 \(\pm\) 0.93 & BC & 17.73 \(\pm\) 0.15 & CD \\
3 & M50 + JA50 & 32.52 \(\pm\) 0.75 & AB & 39.33 \(\pm\) 0.80 & C & 25.63 \(\pm\) 0.45 & AB & 18.58 \(\pm\) 0.70 & BC \\
4 & M30 + JA70 & 31.51 \(\pm\) 0.56 & BC & 36.83 \(\pm\) 0.14 & D & 26.31 \(\pm\) 0.05 & AB & 19.64 \(\pm\) 0.10 & AB \\
5 & JA100 & 30.58 \(\pm\) 0.30 & C & 33.16 \(\pm\) 0.41 & E & 27.81 \(\pm\) 0.28 & A & 19.81 \(\pm\) 0.52 & A \\ \hline \hline \end{tabular} Legend: Mean of measured values (\(n=3\)) is shown \(\pm\) Standard Deviation (SD). M—Maize, JA—Jerusalem Artichoke, DM—dry matter, NDF—neutral detergent fiber, ADF—acid detergent fiber, CF—crude fiber.  
\end{table} 
Table 4: DM, NDF, ADF and CF contents in the prepared model silages. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Silage** & **DM** & **CP** & **NDF** & **ADF** & **ADL** \\ \hline Jerusalem artichoke, (JA100) \({}^{1}\) & 30.6 & 5.1 & 33.2 & 27.8 & 8.1 \\ Jerusalem artichoke (squaring stage) \({}^{2}\) & 25.8 & 11.6 & 43.9 & 31.7 & 7.5 \\ Yellow maize, normal, (M100) \({}^{1}\) & 33.6 & 9.3 & 43.8 & 21.1 & 2.3 \\ Yellow maize, normal (32\% to 38\% & 35.1 & 8.8 & 45.0 & 28.1 & 2.6 \\ DM) \({}^{3}\) & 35.5 & 12.0 & 56.3 & 34.5 & 5.6 \\ Barley \({}^{3}\) & 34.6 & 12.9 & 60.6 & 38.9 & 5.5 \\ Ryegrass (annual, vegetative stage) \({}^{3}\) & 29.7 & 16.1 & 57.8 & 34.9 & 4.5 \\ Wheat (head) \({}^{3}\) & 33.3 & 12.0 & 59.9 & 37.6 & 5.8 \\ \hline \hline \end{tabular} Legend: \({}^{1}\) Results of our experiment, \({}^{2}\) Adapted from [PERSON] et al. [50], \({}^{3}\) Adapted from NRC [48].  
\end{table} 
Table 5: Comparison of DM, CP, NDF, ADF and ADL contents in Jerusalem artichoke silages and several main fodder silages (% DM). [PERSON] et al. [53] and [PERSON] et al. [54] inform that biomass with a high content of lignocellulosic exhibits low biogas yield and biological degradability due to the low biological degradability of lignin. [PERSON] et al. [55] maintain that enhanced degradability of lignocellulose biomass for the production of methane can be supported by inoculation or bioaugmentation using the rumen microbiota.