| This paper starts from the typical models of soil water dynamics as bare land evaporation model, evapotranspiration model, soil water infiltration model, and summarizes the research progress of pla
nt root water uptake model, solute transport model and agricultural ecosystem model in the SPAC system. The article also analyzes and discusses the problems and shortcomings existed in current establishing model in the SPAC system by the soil water hydrodynamics model, and carries out the expectation for the developing direction and application prospect in this field. The research tendency of evapotranspiration model in future is to establish accurate numerical model to solve
the practical problems. The dynamic expansion of the infiltration model from point to region, combined with the soil erosion, pollutant migration is the potential research direction. The root water absorption model should be more and more used to monitor the soil water dynamics design reasonable irrigation schedule and the droughts forecast system. It will provide strong support for the practicability and accuracy of the model by using the computer, remote sensing technology
and so on to establish the mechanism model concerning matter and energy circulation in the agricultural ecological system. |