# Quality of Maize Silage After Using Meat Bone Meal as a Phosphorus Fertilizer in a Field Experiment
## 3 Results
### Macronutrient Content of Maize Silage  
In all five fertilization treatments, the P and K contents of whole-crop maize silage remained stable (1.73-1.96 g P, 11.4-13.5 g K DM), and it was not significantly modified by the application of fertilizers (Table 3). However, the Ca and Mg contents of silage were affected by fertilization (\(p\leq 0.01\) and \(p\leq 0.05\), respectively). The concentration of Ca was significantly higher in the inorganic NPK treatment (1.44 g\(\cdot\)kg\({}^{-1}\) DM) and the 2.0 Mg MBM treatment (1.49 g\(\cdot\)kg\({}^{-1}\) DM) than in the other treatments. Similarly to Ca, the Mg content in silage was significantly higher in the inorganic treatment (1.00 g\(\cdot\)kg\({}^{-1}\) DM).  
\begin{table}
\begin{tabular}{l c c c c c c c c c c} \hline
**Treatment (0)** & **DM 1** & **CA 2** & **CP 3** & **EE 4** & **CF 5** & **NDF6** & **ADF 7** & **ADL 8** & **NFC 9** \\ \hline \multicolumn{10}{c}{**g**-**kg-1 DM**} \\ \hline Total average & 319.7 \(\pm\) 7.61 & 39.2 \(\pm\) 0.79 & 64.9 \(\pm\) 1.89 & 26.3 \(\pm\) 1.05 & 220.9 \(\pm\) 5.81 & 460.7 \(\pm\) 9.53 & 285.4 \(\pm\) 7.17 & 196.6 \(\pm\) 0.78 & 408.8 \(\pm\) 5.62 \\ \hline
1. Zero-fert & 312.1 \(\pm\) 17.99 & 39.3 \(\pm\) 1.48 & 52.4 \(\pm\) 3.18 & 24.4 \(\pm\) 2.28 & 224.5 \(\pm\) 14.74 & 468.5 \(\pm\) 25.37 & 287.0 \(\pm\) 6.09 & 179.8 \(\pm\) 1.65 & 415.4 \(\pm\) 2.33 \\
2. Inorganic NPK & 328.6 \(\pm\) 18.96 & 409.4 \(\pm\) 1.96 & 77.2 \(\pm\) 3.03 & 28.4 \(\pm\) 2.23 & 216.5 \(\pm\) 9.51 & 441.1 \(\pm\) 13.75 & 269.5 \(\pm\) 11.35 & 16.9 \(\pm\) 1.80 & 412.4 \(\pm\) 17.63 \\
3. 1.0 Mg MgMM + N\({}_{\rm{Ng}}\) & 323.2 \(\pm\) 18.21 & 35.5 \(\pm\) 1.41 & 69.4 \(\pm\) 3.59 & 26.4 \(\pm\) 2.61 & 223.8 \(\pm\) 14.18 & 457.2 \(\pm\) 22.34 & 283.9 \(\pm\) 17.28 & 226.4 \(\pm\) 1.56 & 411.5 \(\pm\) 21.54 \\
4. 1.5 Mg MgMM + N\({}_{\rm{Ng}}\) & 324.6 \(\pm\) 15.48 & 38.1 \(\pm\) 1.92 & 64.7 \(\pm\) 3.51 & 26.7 \(\pm\) 2.31 & 221.2 \(\pm\) 13.85 & 464.9 \(\pm\) 22.53 & 286.0 \(\pm\) 16.21 & 20.1 \(\pm\) 13.4 & 140.6 \(\pm\) 18.63 \\
5. 2.0 Mg MgMM & 310.2 \(\pm\) 16.61 & 42.1 \(\pm\) 1.73 & 60.9 \(\pm\) 4.55 & 25.7 \(\pm\) 2.47 & 228.0 \(\pm\) 13.86 & 472.1 \(\pm\) 22.89 & 389.9 \(\pm\) 19.65 & 20.8 \(\pm\) 2.11 & 399.2 \(\pm\) 16.32 \\ \hline Annual 2014 & 312.5 \({}^{b}\)\(\pm\) 5.21 & 40.5 \(\pm\) 1.62 & 79.3 \(\pm\) 2.06 & 36.0 \(\pm\) 0.67 & 169.4 \(\pm\) 4.31 & 373.2 \(\pm\) 7.71 & 221.8 \(\pm\) 6.12 & 21.7 \(\pm\) 1.36 & 471.1 \(\pm\) 6.87 \\ mean (\(\gamma\)) & 2019 & 262.1 \(\pm\) 7.53 & 39.5 \(\pm\) 9.96 & 61.7\({}^{b}\)\(\pm\) 2.38 & 235.5 \(\pm\) 0.99 & 259.9 \(\pm\) 4.72 & 254.0 \(\pm\) 9.68 & 335.5 \(\pm\) 7.87 & 22.4 \(\pm\) 1.01 & 351.4 \(\pm\) 5.41 \\
2020 & 384.7 \({}^{a}\)\(\pm\) 7.47 & 37.6 \(\pm\) 1.47 & 53.9 \(\pm\) 2.42 & 19.5 \(\pm\) 1.03 & 233.6 \({}^{b}\)\(\pm\) 4.04 & 485.1 \({}^{b}\)\(\pm\) 6.93 & 299.1 \(\pm\) 4.99 & 14.8 \(\pm\) 10.2 & 404.0 \(\pm\) 4.58 \\ \hline Interaction (\(\kappa\times\gamma\)) & ns & ns & ns & ns & ns & ns & ns & ns & ns \\ \hline \multicolumn{10}{c}{**ns**} \\ \hline \multicolumn{1 Significant differences in the content of P, K, and Mg in maize silage were noted between years of the study (Table 3). The silage with the highest P content was made in 2014 (\(p\leq 0.05\)), and the silage with the highest K content was made in 2019 (\(p\leq 0.01\)). The silage made in 2014 had the highest Mg content (\(p\leq 0.01\)), relative to 2019 and 2020. A significant interaction between the type of fertilizer and the year of the study was found for P concentration in maize silage (Figure 1).