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At model steady state, fertilization reduced microbial enzyme pools by ~16% and enhanced soil C by ~3%
| Watershed | Exudation | Enzyme pool (mg/cm3) | Soil C pool (mg/cm3) |
|---|---|---|---|
| Control | No change | 0.0136 | 184.73 |
| Fertilized | No change | 0.0114 | 190.92 |
| 25% reduction | 0.0097 | 221.16 |
When root C exudation was reduced 25% on a per g root basis in the fertilized watershed, there was a further exacerbation in the reduction in microbial enzyme activity to a ~28% decline and a larger increase in soil C by ~20%.
