Relationship between mineralized nitrogen during anaerobic incubations and residual effect of nitrogen fertilization in two rice paddy soils in Chile

CONCLUSIONS

We have shown that the index of N uptake, as a result of the residual effect from the previous fertilization, allows determining the quantity of N that can be saved for the following season. Soils incubated at different time lapses and temperatures generate values of mineralizable N. Therefore, the correlation between N uptake and mineralized N are good measures to estimate the best incubation  methodology  that  reflects  field  conditions.

Thus, these indexes will greatly contribute to save amounts of N to each 1 mg N kg-1  mineralized for the Alfisol and Vertisol, respectively.