The application belongs to the field of
saline-
alkali soil crop planting method, and particularly relates to a
straw deep-layer paving and field returning operation method, which comprises the following steps: step 1, ground loosening; step 2,
ridge forming; step 3,
straw paving in a
ridge ditch, and first
crop planting on a
ridge; step 4, after the first
crop is harvested, the ridge is broken and the ground is leveled, the
straw in the ridge
ditch is filled and returned to the field by the soil on the ridge, and after the ground is leveled, the second crop is planted; and step 5, after the second crop is harvested, steps 1-4 are repeated to realize the
continuous cropping of the first crop and the second crop, wherein the position of the ridge forming area is the ridge
ditch in the last cycle, and the ridge ditch is the ridge forming area in the last cycle. In the process of planting the first crop, the soil on the ridge protruding above the ridge ditch is effectively leached, and due to the allochthonous soil taking in the process of ridge forming, the
transpiration channel is broken, thereby playing a certain salt return inhibition effect, the straw in the ridge ditch prevents water
evaporation, thereby playing an effect of isolating salt upward return, and the planting conditions of the second crop are ensured to be good.