The invention belongs to the technical field of
crop fertilization, and discloses a water and
fertilizer integrated fertilization method based on a
crop root growth distribution rule, and the method comprises the following steps: planting crops and reference crops at the same time; calculating
root system distribution of the reference
crop through a calculation terminal, generating different soil
layers along a vertical line direction through
simulation, and calculating water and
fertilizer proportions of the different soil
layers; detecting
root system distribution conditions of reference crops in different soil
layers through a detection device; burying an infiltrating
irrigation pipeline in the infiltrating
irrigation pit by taking the crop stalk as a circle center; mixing the crop
fertilizer with water to obtain a liquid fertilizer; the
irrigation water mixed with the liquid fertilizer flows into the soil through the infiltrating irrigation pipeline for fertilization, and the flow of the liquid fertilizer output by the infiltrating irrigation pipeline is controlled according to the three-dimensional fertilization proportion control model. According to the invention, the
root system distribution of the reference crop is calculated through the calculation terminal, so that the water-fertilizer proportion and the infiltrating irrigation time required by crop roots in different soil depths can be accurately determined.