MODELLING WITH KINETIC EQUATIONS OF TRANSFORMATION OF DIFFERENT NITROGEN FERTILIZER IN A SOIL CORE INCUBATION AND A POT EXPERIMENT

Understanding better the processes of N-cycle are necessary to proceed to practical, rational, environmental friendly fertilization for supplement of N-nutrition. Soil core and pot incubation experiments are used to estimate the available nitrogen capacity of the soil and the N-gaseous losses. The substance of the two methods is to determine the different nitrogen forms and the gaseous losses after the soil incubation witch happening in a defined time period and moisture levels. Modelling of the processes of the transformations is happened with the “four-pools” model. The pools are connected by kinetics differential equations. An essential of the experiments is that the quantity of the available nitrogen sources and the gaseous losses are possible to determine in every moment.