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What to Do When Cotton Is Killed by Rainwater? A Detailed Guide to Post-Disaster Remedial Measures

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Drain waterlogging and clear silted ditches in time. After a cotton field is flooded, the soil's physical and chemical properties change, humidity becomes too high, and air is lacking, which can suffocate the cotton plants to death. Even if they do not die, they are prone to disease, and root penetration is hindered. The waterlogging must be drained as quickly as possible, and at the same time the clogged perimeter ditches, waist ditches and bed ditches should be cleared to lower the groundwater level and create a good ecological environment for the cotton seedlings so they can resume growth. Straighten and wash the seedlings in time, washing them as the water recedes. Clean the silt off the cotton leaves and stems so the leaves can quickly recover

Drain waterlogging and clear silted ditches in time. After a cotton field is flooded, the soil's physical and chemical properties change, humidity becomes too high, and air is lacking, which can suffocate the cotton plants to death. Even if they do not die, they are prone to disease, and root penetration is hindered. The waterlogging must be drained as quickly as possible, and at the same time the clogged perimeter ditches, waist ditches and bed ditches should be cleared to lower the groundwater level and create a good ecological environment for the cotton seedlings so they can resume growth.

Straighten and wash the seedlings in time, washing them as the water recedes. Clean the silt off the cotton leaves and stems so the leaves can quickly recover their aeration and photosynthesis functions. If the water recedes too quickly and there is no water left for washing, a sprayer can be used to rinse them. For cotton plants left leaning every which way after flooding, carefully straighten them upright and earth up around the base to stabilize them, so the plants grow upright and the ventilation and light conditions in the cotton field are improved. For severely defoliated, bare-stemmed cotton fields, actively rescue them; as long as scraping the epidermis of the basal stem still reveals green and the stem tip has not died, make every effort to save them, and do not lightly destroy the cotton and replant another crop.

Cultivate and loosen the soil in time. Timely cultivation and loosening of the soil after the disaster helps improve soil permeability and promote root development. When the weather clears, promptly loosen the soil and break up the crust, remove sprouting weed shoots, and earth up appropriately according to the growth of the cotton seedlings to increase soil moisture around the roots, promote robust growth of the cotton seedlings and prevent lodging.

Apply fertilizer and water appropriately. The growth period of waterlogged cotton fields is noticeably delayed, so foliar fertilization should be carried out as soon as possible to help the cotton quickly regain vitality. Per mu, 50-75 kg of a mixed solution of 0.2% potassium dihydrogen phosphate and 2% urea can be sprayed; after the first foliar fertilizer spray, spray once more 5-7 days later. Waterlogged cotton fields lose a large amount of potassium, so potassium fertilizer should be added: 7.5-10 kg of potassium chloride per mu, or 150-200 kg of plant ash. This accelerates the robust growth of the cotton.

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