Open Access
Table 4.
Influence of zeolite and mineral fertilizers on the content of available forms of nitrogen, phosphorus and potassium in the soil, mg/kg (average values during vegetation)
| Option | (N-NH4)+ (N-NO3) | P2O5 | K2O | |||
|---|---|---|---|---|---|---|
| content | deviation from control | content | deviation from control | content | deviation from control | |
| Control | 7.8 | – | 148 | – | 119 | – |
| Zeolite 500 kg/ha | 8.4 | +0.6 | 153 | +5 | 129 | +10 |
| Zeolite 2000 kg/ha | 8.4 | +0.6 | 158 | +10 | 131 | +12 |
| N60P60K60 (NPK) | 11.3 | +3.5 | 180 | +32 | 149 | +30 |
| Zeolite 500 kg/ha+ NPK | 11.5 | +3.7 | 181 | +33 | 153 | +34 |
| Zeolite 2000 kg/ha +NPK | 11.7 | +3.9 | 183 | +35 | 158 | +39 |
| LSD05 | 0.4 | 5 | 8 | |||
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