The transplanting of cotton seedlings with nutrients can fully utilize light and heat resources and solve the contradiction between grain, cotton, oil and land. Generally, the production is increased by 15% to 20%, and that before frost is increased by about 20%. However, according to the survey, some farm households are experiencing high-temperature burning and sprouting at different levels each year because seedbed management is not in place. Now several precautions are introduced as follows: Strictly adjusting temperature. During sowing and emergence, we should master the principle of “high-temperature rushing seedlings”, strictly seal the membranes, increase the temperature and moisturize and urge the whole seedlings, control the seedbeds at 30-35, and do not ventilate them until 80%. Grasp the principle of suitable temperature, loose and wet long leaves, and control the bed temperature at 25 to 30 degrees Celsius. Therefore, in front of two true leaves, the main cover film is used, and two true leaves are followed by open film, before emergence. The plastic film is flattened to moisturize the seedlings, and when the cotyledons are unearthed, 40%~60% of the arch cover film is lifted. After the first two sunny days, Miao peeled off the sunbeds to reduce the humidity on the bed. In the first true leaf stage, the temperature in the membrane is maintained at 20-25 degrees Celsius, and the membrane is covered in the night and covered in the evening. After the seedlings reach 2 true leaves, the sky cover will be opened on the sunny day and covered with rainy days. After 3 true leaves, the film can be peeled off day and night. Generally, the film is not covered. In case of strong winds and heavy rain, the weather must be covered.

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