Whole process Chemical Control Technology of Cotton

Cotton has unlimited growth habits, and vegetative growth and reproductive growth overlap at the same time. If fertilizer and water are not properly managed or climatic conditions change, cotton plants are very prone to overgrowth or greedy green late maturity, which is very disadvantageous to the realization of high and stable cotton yield. This problem is generally solved by chemical regulation. At present, the application of important techniques of plant cultivation to chemical control of cotton has become one of the important techniques of cotton high-yield cultivation, and the application of growth regulators has changed from passive and a small number of symptomatic application to active, multi-dose induction and chemical control, and we should mainly grasp the following periods in production. The main results are as follows: 1. Soaking cotton seeds during sowing period can be used (100,200) × 10 ~ (- 6) × 10 ~ (- 6) (that is, 1 gram of raw powder plus 10 kg or 5 kg of water). Non-tufted cotton seeds can be soaked in (200 ~ 300) × 10 ~ (- 6) × 10 ~ (- 6) solution, generally soaking for 5 hours for 8 hours, and then sowing. If machine sowing is needed, the seeds should be micro-dried after being fished out, and then sowed after a little dry. The cotton seedlings treated by soaking seeds generally grow steadily and have well-developed roots. 2. After spraying cotton bud at bud stage, 0.5g Anyuan powder is used every 667m 2, and spray water 10kg 15kg, which can promote root and seedling strength and coordinate the supply of water and fertilizer. 3. After foliar spraying in cotton field at early flowering stage, spraying 1g / 667m 2 of ammonium powder and spraying 15kg / 20kg of water can shape plant type, optimize canopy structure, postpone sealing, promote early boll and cotton boll development, and simplify mid-term pruning. 4. After spraying bolls on the middle and lower parts of cotton plants at full flowering stage (usually at the end of July), 2g of ammonium powder was used every 667m 2, and 20kg of water was sprayed. Spray at this time, can promote more early autumn peach, increase the boll weight, but also can prevent greedy green late ripening.