Key Points of Current Technical Management Measures for Cotton

I. Do a good job in seedbed stage management

1. Ventilate in a timely manner to reduce humidity, thin the seedlings and remove weeds. After the cotyledons of the cotton seedlings flatten and turn green, ventilate slightly in a timely manner for 1-2 days to reduce humidity; take advantage of sunny and warm weather to sun the boards and reduce humidity, thin the seedlings and remove weeds.

2. Do a good job in chemical regulation of cotton seedlings. When the cotton seedlings form a heart and begin to produce true leaves, chemical regulation should be carried out in a timely manner. For each standard seedbed per mu of field, use 1 bag of the seedbed-specific biochemical preparation Cu Zhuang Su, mix with 2 kg of water, and spray evenly to prevent the cotton seedlings from shooting up and forming leggy seedlings.

3. Scientifically regulate temperature. Pay attention to two points in bed temperature regulation: first, persist in ventilating without removing the film. During the period from full emergence to 2 true leaves, appropriately raise the bed temperature to speed up leaf emergence and promote early seedlings; after the 2nd true leaf flattens, persist in ventilating day and night, especially for insect-resistant cotton seedlings with relatively strong vigor, and pay attention to adjusting the position and size of the ventilation openings. Second, prevent headless seedlings. After true leaves emerge, the cotton seedlings should be kept appropriately warm; in case of low-temperature weather, close the ventilation openings promptly to avoid cold damage that causes the growing point to shrink.

II. Persist in moving the pots to control seedling growth, and transplant at the right time

Many years of practice have proved that moving the pots to control seedling growth can effectively shorten the seedling recovery period after transplanting and promote earlier recovery and growth. Generally, move the pots to control seedling growth 10-15 days before transplanting, and pay attention to separating large and small seedlings, placing small seedlings in the middle of the bed. After moving the pots, promptly do a good job in the "three supplements and one increase" work of supplementing soil, fertilizer, and water and increasing bed temperature. On the basis of persisting in good field land preparation and fertilization, ensure quality and transplant at the right time on May 10-15.

III. Do a good job in the cultivation and management of intercropped and relay-cropped crops in cotton fields

For many years, our county has still mainly used composite planting types such as melon-cotton, bean-cotton, and corn-cotton. In watermelon cultivation: first, continue to strengthen seedbed management and cultivate strong watermelon seedlings; second, promptly do a good job in hardening the seedlings and in field land preparation, burying fertilizer, and caring for the previous crop. For intercropped and relay-cropped crops such as green soybeans and corn, do a good job in field management after sowing and planting, especially in caring for the previous crop, clearing ditches, and improving soil moisture conditions.

IV. Do a good job in direct-seeded cotton production

In the coastal reclamation area of our county, there is still a certain area of direct-seeded cotton. Pay attention to two points: first, promptly do a good job in pre-sowing field preparation such as field land preparation, fertility building, and clearing ditches and improving soil moisture conditions; second, seize the season (around April 25) and suitable soil moisture to sow in a timely manner, promote plastic-film direct-seeding technology, and strive for early growth and high yield.