Comparison of different models to simulate soil temperature and moistureeffects on nitrogen mineralization in the soil

摘要

The rate of mineralization of organic nitrogen (N) in soils depends on environmental factors, specially temperature and water content. In this paper, different models that describe temperature and water content effects on mineralization are examined and the values of the factors used in the different models are compared. The results of mineralization simulations, using the different models at different levels of water content and temperature, are compared with experimental field data from the literature. The results show that the principal differences are found at temperatures greater than 25 degrees C and at water content levels near saturation and near permanent wilting point. The different models were used for an estimation of net mineralized N under field conditions in a soil with ryegrass by using a deterministic model of water and N transport in the soil. The results confirm the differences of moisture and temperature effects on mineralization when the soil became very dry and wet during the rainy months.