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Table III
Correlations between differences in concentrations of mineral N forms, net nitrification and net mineralization in burned and control soils, and burning severity parameters. (s.e., standard error).
| Dependent variable | Period | Independent variable | Sign | Model | s.e. | r 2 |
|---|---|---|---|---|---|---|
| Ammonium | Immediately after fire | Fuel consumption | – | Linear | 17.28 | 0.446 |
| Fire Linear Intensity | – | Linear | 16.54 | 0.493 | ||
| Mean duration temperatures | – | Linear | 13.31 | 0.670 | ||
| > 300 °C on the litter surface | ||||||
| Mean for the first year after treatment | Mean duration temperatures | + | Potential | 33.43 | 0.606 | |
| > 300 °C on the litter surface | ||||||
| Mean for the first study period | Mean duration temperatures | + | Potential | 38.51 | 0.586 | |
| > 300 °C on the litter surface | ||||||
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| Net-Mineralization | Mean for the first year after treatment | Mean duration temperatures | – | Exponential | 75.12 | 0.464 |
| > 300 °C on the litter surface | ||||||
| Mean for the first study period | Mean duration temperatures | – | Exponential | 46.63 | 0.508 | |
| > 300 °C on the litter surface | ||||||
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| Dependent variable | Period | Independent variable | Sign | Model | s.e. | Tau |
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| Net-Nitrification | Mean for the first year after treatment | Fuel load before burns | – | Linear | 22.58 | 0.415 |