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1. Deep ploughing and soil preparation: The farmland time of cotton fields can be divided into winter tillage and spring tillage, and winter tillage is better than spring tillage. Winter plowing should be deeper, generally 20-30 cm. The spring plowing should be properly shallow, generally 13-16 centimeters is appropriate; after cultivating, it is necessary to finely prepare the soil so that it can be applied to the virtual reality, the soil is loose, and the water is stored.
2, Shizujifei: Shizujifei, fertility is the basis for high-yield cotton. The amount of basal fertilizer should be based on the yield, soil fertility and fertilizer quality. The average cotton yield is more than 125 kilograms of lint in cotton fields, 5000 kilograms of organic fertilizer in Mushi, 50 kilograms of cake fertilizer, 20-30 kilograms of ammonium bicarbonate, and 50 kilograms of superphosphate.
3, pouring enough water at the end: According to the city's winter and spring climate characteristics, pouring enough water at the end, build a good mouth, is to ensure that the timely sowing of cotton, a broadcast seedlings, and promote effective early prevention of strong seedlings. Irrigation in cotton fields is effective for winter irrigation. Spring irrigation can generally begin immediately after the soil is thawed. At the latest, it must end at the end of the first half of sowing. This will help the ground temperature rise and guarantee timely sowing and seedling seedling growth.
4, plastic film preparation: General mu film 2 - 2.5 kilograms, a single row sowing optional width of 60 cm mulch, double row sowing optional 90 or 100 cm wide mulch, pre-emergence herbicide available acetochlor 100 ml per acre Spray before spraying.
2. Seed preparation. The seed quality of cotton seeds is closely related to seedling and seedling maintenance. At present, China is vigorously promoting the use of foamed acid, fleece, selection and seed coating techniques. It is an important measure to improve the quality of seed sowing to prevent seedling stage pests and diseases, and to achieve complete seedlings and strong seedlings with early emergence. To buy seeds, we must choose the seeds of high quality and good quality that are produced by regular manufacturers. The sowing rate of general machinery is about 1.5-2 kg/mu; the artificial seeding quantity is about 1-1.5 kg/mu.
Determination of sowing date: Insect-resistant cotton is generally broadcasted 3-4 days later than conventional cotton, trying to avoid the adverse effects of low temperature, requiring 5 cm of ground temperature to stably pass 14 °C (or the temperature is stable at 16 °C or more). It is important to note that too early sowing may cause serious disease and heavy seedlings at seedling stage due to factors such as low temperature, low temperature and high humidity in rain, and late frost. This must be taken seriously. The suitable sowing date for mulch cotton is April 15-25; the open field cotton is usually planted after April 25, and ends before and after May. In addition, in the saline-alkali soil cotton fields, it is difficult to absorb the cotton seeds. Therefore, the bottom pod and mouth ridge should be ensured, and sowing should be appropriately delayed (the temperature of 5 cm is required to be stable at 16-17°C).
Preparation for cotton before planting
First, make preparations before sowing. The land preparation and live cotton fields should be kept in good condition within a suitable period of time, so that the plough layer can be applied to the virtual reality.