Cotton sowing techniques in spring

According to the variety, soil fertility and planting mode to determine the density, reasonable close planting, to achieve one sowing the whole seedling. Generally single planting spring cotton varieties, the density per mu is about 3500 plants, row spacing is 1 meter, plant spacing is 19 cm; semi-spring varieties are generally controlled at about 4500 plants per mu, row spacing, plant spacing is 15 cm; summer cotton varieties, in the plots with good fertilizer and water conditions, the density per mu is about 6500 plants; the plot of general soil fertility is about 7500 plants; and the dry and barren low-yield land is about 8000000 trees. The first sowing whole seedling is the basis of increasing production and bumper harvest. In order to achieve the first sowing whole seedling, we must first select the seeds of higher quality. Secondly, necessary seed treatments must be carried out before sowing, such as seed selection and drying, in order to improve the germination rate and necessary germination potential. In order to prevent cotton seedling disease, seed dressing should be carried out. Third, we should pay attention to the quality of sowing and sow enough moisture. Generally, the sowing depth is about 4 cm. In addition, spring cotton should pay attention to the application of sufficient base fertilizer, generally more than 5 square organic fertilizer per mu and about 20 kilograms of ammonium dihydrogen phosphate.