Saline-alkali soil stability evaluation method and system based on BP neural network

The invention discloses a saline-alkali soil stability evaluation method and system based on a BP neural network, and relates to the technical field of saline-alkali soil ecological stability, and the system comprises an electronic map unit and a first evaluation unit which obtains a first soil data set, obtains a first soil evaluation value Po based on the first soil data set, and carries out the first evaluation of the current soil salinity and alkalinity; the second evaluation unit is used for acquiring a second soil data set and a second soil evaluation value Pt; the first analysis unit is used for fitting the change trend of the second soil evaluation value Pt, determining a detection period and calculating the stability of the second soil evaluation value; and the second analysis unit constructs a neural network model, simulates the change trend of the soil parameters, and judges the parameter stability in the second soil data set. Compared with the direct simulation of the change trend of the second so