How to manage green onions with high temperature and rainy summer?

Summer high temperature and rainy how to manage onions? Thank you for your early guidance. After transplanting, the physiological function of root system is weak and the seedling is slow under the condition of high ground temperature, so it is not suitable to water more. When it is very dry, you can irrigate small water. When it rains, pay attention to drainage and waterlogging prevention. After rain, you can cultivate and loosen the soil in time to prevent the roots from rotting through moisture drainage and ventilation. After the beginning of autumn, the night temperature is obviously reduced, so the watering frequency should be increased to keep the ground moist. Watering in the morning and evening is best to speed up plant growth. Cultivate soil and topdressing to obtain high yield. Scallion seedlings should be light after the earth, that is, the cultivation ditch can be smoothed, so that can prevent lodging, water prevention. After the beginning of autumn, cultivate soil once every 15 days, 3~4 times, which is the key measure to increase the length of scallion white. Cultivate soil when the soil temperature is low, do not cultivate soil when the soil temperature is high, and the height of soil cultivation should not bury the heart leaf. Topdressing should grasp two points: first, fertilizer is mainly nitrogen fertilizer, appropriate phosphorus and potassium fertilizer. The second is light before and heavy after, that is, the first topdressing after the beginning of autumn, 10 kg urea and 5~10 kg compound fertilizer can be applied per mu; when the weather is cool in early September, 15 kg urea and 15 kg compound fertilizer can be applied per mu. Early root promotion is the foundation. After transplanting, the physiological function of root system is weak and the seedling is slow under the condition of high ground temperature, so it is not suitable to water more. When it is very dry, you can irrigate small water. When it rains, pay attention to drainage and waterlogging prevention. After rain, you can cultivate and loosen the soil in time to prevent the roots from rotting through moisture drainage and ventilation. After the beginning of autumn, the night temperature is obviously reduced, so the watering frequency should be increased to keep the ground moist. Watering in the morning and evening is best to speed up plant growth. Cultivate soil and topdressing to obtain high yield. Scallion seedlings should be light after the earth, that is, the cultivation ditch can be smoothed, so that can prevent lodging, water prevention. After the beginning of autumn, cultivate soil once every 15 days, 3~4 times, which is the key measure to increase the length of scallion white. Cultivate soil when the soil temperature is low, do not cultivate soil when the soil temperature is high, and the height of soil cultivation should not bury the heart leaf. Topdressing should grasp two points: first, fertilizer is mainly nitrogen fertilizer, appropriate phosphorus and potassium fertilizer. The second is light before and heavy after, that is, the first topdressing after the beginning of autumn, 10 kg urea and 5~10 kg compound fertilizer can be applied per mu; when the weather is cool in early September, 15 kg urea and 15 kg compound fertilizer can be applied per mu. Click to get more green onion planting technology Click to get more vegetable planting technology