Open Access
Table 2
Effect of a biopreparations mixture on the nitrogen-fixing ability of alfalfa.
| Experiment options | Number of active nodule per plant, pcs. | Regrowth after 2-3 days after mowing, in cm | Correlation coefficient, r1, between regrowth and number of nodules | Accumulation of biological nitrogen in the soil, kg/ha | Leaf protein content, % | Correlation coefficient between protein content and number of active nodules, r2 |
|---|---|---|---|---|---|---|
| Control (without seed treatment and feeding) | 64 | 1.32 | 0.68 | 124.0 | 19.0 | 0.74 |
| Inoculation with the 425 strain | 74 | 1.46 | 0.74 | 146 | 19.4 | 0.76 |
| Pre-sowing seed treatment in the PABA aqueous solution | 78 | 1.48 | 0.72 | 156 | 19.6 | 0.78 |
| Pre-sowing seed treatment by “Nikfan” | 82 | 1.52 | 0.76 | 162 | 19.8 | 0.78 |
| Pre-sowing seed treatment by the PABA + “Nikfan” mixture | 126 | 1.62 | 0.78 | 172 | 20.1 | 0.82 |
| Pre-sowing seed treatment + foliar fertilizing 10-15 days after germination | 158 | 1.54 | 0.82 | 188 | 20.8 | 0.82 |
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