The invention discloses a method for constructing a
soil water and salt
simulation model in a
crop root system based on a
complex network, which comprises the following steps: generating a
regular network, constructing the
regular network with an adjustable node number, enabling each node to correspond to a soil body with a set size, and only arranging a vertical connecting edge between the nodes to simulate the vertical water transmission of the soil; creating a random connecting
edge based on
crop growth characteristics, adding the random connecting edge between nodes of the
regular network by adopting a probability normal to simulate a
crop root system, and synchronously generating a connecting edge weight representing a
root system level during adding; a water-salt
dynamic simulation module is designed, volume and infiltration rate parameters of nodes and weight and
transmission delay parameters of connecting edges are initially configured, and a soil
moisture layering result and a salt layering result are output. According to the method, the root
system is simulated through the regular network in combination with probability random edge connection, difficult-to-measure parameters such as
root length and root
diameter are not needed, growth periods of different crops are flexibly adapted, the water-salt
simulation accuracy of the root zone is remarkably improved, and reliable support is provided for agricultural water-salt management.