Cotton growth control measures

Fast-reinforcing weak seedlings accelerate the transformation When there are farmers transplanting cotton seedlings, it is too late to apply base fertilizer, some apply less fertilizer, some apply ammonium bicarbonate, no phosphorus and potassium fertilizer, and do not apply trace elements such as boron and zinc to make cotton seedlings Early deferentiation of different symptoms occurred. At present, it is mainly to focus on buds and flower fertilizers, and to increase the application of commercial organic fertilizers, high-content multi-component fertilizers, and micro-fertilizers. 50 kg of organic fertilizer should be applied per mu, and 25-30 kg of high-content compound fertilizer. Severe nitrogen deficiency is 10~15 kg per urea. For potassium-deficient soil, 10 kg of potassium fertilizer should be added per mu. In the boron-deficient cotton field, the speed-bearing boron is 0.4 kg. After the flowering, 0.1%~0.2% of the speed boron is sprayed 1~2 times.

Control plant type to strive for stability According to many years of observation, the peak period of cotton vegetative growth in the southern cotton region appeared from late June to early July. This year, some farmers have been over-expanded due to partial application of nitrogen fertilizer or excessive fertilization. The delayed plant growth regulator ketamine or auxin should be applied immediately to control the growth of the cotton plant. Apply 5 ml of auxin or 1 gram of ketamine to 15 to 20 kg of water per acre, and use a small number of methods to delay growth according to the growth of cotton. According to the actual effect of controlling the Wang, the amount can be appropriately increased, and the cotton will gradually create a high-yield environment of “the next seal is not sealed (row), the middle one seam, the sun shines in, the air can circulate”, in order to stabilize the cotton and shape it. The ideal high-yield plant type.

Adhere to disaster-resistance and improve resilience. Cotton is in the process of buds and flowering. The southern part coincides with the rainy season. The waterlogging may constitute damage to cotton production at any time. We must do a good job of promoting small and large, controlling and seeking stability, and balanced growth. Repair the irrigation and drainage facilities, clean up the ditch, arrange the sputum, reduce the dark spots, and ensure the normal development of the root system. For cotton that suffers from waterlogging, phytotoxicity and fertilizer damage, it can be sprayed with 1% or 2 times with 0.01% sorghum (alkaline lactone) or 10 ml of Tianfengsu emulsifiable concentrate, 15~20 kg of water, or 0.05%. Spraying "920" solution can effectively promote transformation and gradually return to normal fertility. For cotton fields with more fertilizer loss, urea or high-content compound fertilizer should be replenished in due course.