Study on Soil Water and Salt Information Model of Digital Farmland

Farmland water-salt dynamics is an important part of crop environmental information, and it is also important information of digital farmland. The research history and achievements of soil water and salt transport models are summarized[1]. According to the wide application of soil water and salt transport model, the HYDRUS model, the SWAP (Soil-Water-Atmosphere-Plant) model, and PSWE (Progressive salt-water embedding neural network) model are analyzed emphatically. The solution and application of the model are introduced, aiming at the problem of the spatial variability of model parameters, it is considered that the combination of GIS technology or the use of the PSWE model[2] will produce better simulation results. The development direction of the intelligent solution of soil water and salt transport model is prospected, which provides a reference for the application of the model in digital farmland.