Planting method for dry sowing and wet emergence of cotton in clay loam

The invention discloses a method for dry sowing and wet emergence of cotton seedlings in cohesive soil. The method is suitable for cohesive soil cotton fields with no seedling emergence or poor seedling emergence caused by soil hardening when encountering water, poor air permeability, overlarge surface temperature drop, difficulty in soil leveling, dislocation of seed holes and film holes and the like. The main method comprises the step of using a drip irrigation system to drip 30-40m < 3 >/mu of water in a cotton field before the cotton is harvested in the first year. In the next year, a method of combining underground drip irrigation and aerated irrigation is adopted, when cotton is sown, a combined sowing machine is used for burying the drip irrigation belt under the ground, the burying depth is 10-20 cm under the ground, the burying position is that the flow of water droppers of a narrow row of drip irrigation belt between two rows of cotton is 2.1 L/h, and the distance between the water droppers is 20 cm