Out of the misunderstanding of fertilization in high-yield cotton fields

First, the amount of fertilizer is less. Cotton flowering and bolling period generally lasts from 50 to 60 days from the beginning of July to the end of August. It is the longest period of cotton growth period and an important period for cotton to form economic output. Therefore, this period of cotton requires the most fertilizer. Generally, the amount of fertilizer absorbed by the flowering and boll period accounts for 70% to 80% of the total fertilizer requirement. In view of this, the flower and bell fertilizer should be re-applied on the basis of adding base fertilizer. Some cotton farmers follow the habit of chasing urea with 10 to 15 kilograms of urea, fearing that fertilization will cause cotton to grow wild. Due to fertilizer restrictions, cotton production is hovering at a level of 200-250 kg. If you want to achieve a high production level of more than 300 kg per mu, the urea in the flower and boll period should be no less than 20 kg, so as to meet the demand of high-yield cotton fields. If the application of phosphorus and potassium fertilizer is insufficient, it can be mixed with nitrogen fertilizer to improve fertilizer efficiency.

Second, the topdressing is late. In the past, it has been used in the past when the flower bell fertilizer was used to enter the belling period and the lower part was sitting 1 or 2 large bells. According to the fertility characteristics of cotton, the time of topdressing of flower bell fertilizer should be advanced to the initial flowering stage. The initial flowering period is from the beginning of the cotton field to the time when the fourth fruit branch begins to bloom, combined with chemical control and topdressing, so as to promote and control . When the flower boll fertilizer has a large amount of one-time application, it can be divided into two times, the first time in the initial flowering period and the second in the flowering bell period.