Table 2 Correlations plant biomass and ammonium and nitrate concentrations (%) in soil solution 2, 5, 8, and 11 weeks after the start of the experiment.
Shoot biomass | Root biomass | Spike biomass | Shoot-to-root ratio | |||||
|---|---|---|---|---|---|---|---|---|
R² | P-value | R² | P-value | R² | P-value | R² | P-value | |
Ammonium %, week 2 | <0.01 | 0.631 | <0.01 | 0.896 | <0.01 | 0.939 | <0.01 | 0.670 |
Ammonium %, week 5 | <0.01 | 0.481 | <0.01 | 0.640 | 0.02 | 0.125 | 0.03 | 0.123 |
Ammonium %, week 8 | <0.01 | 0.396 | 0.03 | 0.113 | <0.01 | 0.882 | <0.01 | 0.731 |
Ammonium %, week 11 | <0.01 | 0.879 | <0.01 | 0.593 | 0.02 | 0.160 | <0.01 | 0.813 |
Nitrate %, week 2 | <0.01 | 0.428 | <0.01 | 0.826 | <0.01 | 0.503 | <0.01 | 0.535 |
Nitrate %, week 5 | 0.28 | <0.001 | 0.15 | <0.001 | 0.18 | <0.001 | 0.02 | 0.167 |
Nitrate %, week 8 | 0.03 | 0.122 | <0.01 | 0.448 | 0.02 | 0.140 | <0.01 | 0.709 |
Nitrate %, week 11 | 0.01 | 0.318 | 0.02 | 0.191 | 0.01 | 0.291 | 0.02 | 0.141 |
