Delayed field management in cotton fields
How to strengthen the management of late-issued cotton fields and fight for early maturing and high-yield should be adapted to local conditions. According to the causes, the classification should be carried out:
I. Delayed sowing and transplanting, resulting in delayed cotton fields, management measures should be taken to promote the main, promote control combined, promptly exterminate, cultivator, combined with cultivator topdressing, topdressing pay attention to increase phosphorus, potash investment, Balanced fertilization; currently, if it has not been top-dressed, generally 25 kg of compound fertilizer in Mushi, 10 to 15 kg of potash and urea are each concentrated in the middle of the big line. At the same time, chemical control, pruning, promotion, and control are required. After the June 1st in the South, cotton, cotton, rapeseed, cotton fields and northern summer sowing cotton were transplanted. From late July to mid-August, chase compound fertilizer and urea each by 5 to 10 kilograms, and the time to top can be delayed by 3 to 5 days according to local customs.
Second, in the case of late-onset cotton caused by drought, low temperature and rainy weather in local areas during the seedling period, it should be promoted mainly and timely fertilizer should be applied.
Third, for excessive vegetative growth, due to vegetative growth, reproductive growth disorders, resulting in delayed cotton fields, should be dominated by control. This type of cotton fields are often caused by excessive nitrogen fertilizers, insufficient P and K, resulting in too many branches and fruit branches; timely pruning and good chemical control are required. Density, to remove all the leaves, and remove the lower part of the big leaves, while the injection of 2% to 3 grams of muscimol, there is a mad trend can be increased to 4 grams, and spraying potassium dihydrogen phosphate to promote Its transformation to reproductive growth, such as the bell after the appropriate top dressing.
Fourth, due to lack of light, high temperatures, cotton plant is weak, internodes longer, leaves a strong light, showing the phenomenon of defertilization of the cotton field, fertilizer, chemical control, should be carried out at the same time.
Delaying the development of cotton fields should pay more attention to the prevention and control of pests and diseases.
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