From the 5th to the 8th, there is more rain in the south, and “cold soaking and warming” is a good spring planting spring.

It is expected that from today (5th) to the 8th, a new round of cold air will affect most of China's regions, and the north will cool down and the south will be rainy. Among them, there are heavy rains in the southwestern part of the country, the middle and lower reaches of the Yangtze River and most of the southern part of the country, and heavy rains in parts of southern Hunan, central Jiangxi, northeastern Guangxi, southern Zhejiang, and northern Fujian. In the southern region, spring ploughing is currently underway, and it is necessary to pay attention to the weather and the disadvantages of farming.

The current weather is low in temperature and low in rain. It is recommended that farmers in the south who are springing in spring and spring will adopt a method of covering the film to keep warm and cold, and avoid the influence of weather on the seedlings to ensure the quality of sowing. In addition, for some vegetables such as peppers and tomatoes that have not yet been planted, they can wait until the weather turns fine and the temperature rises. That is to say, according to the weather changes, cold soaking and warming technology is adopted. Under normal climatic conditions, during the spring early rice sowing season, master the cold soaking and sowing technology, soak the seeds when cold air intrusion, if the cold period is short, accelerate the germination (cold warm water); the cold period is long, the germination is reduced Slow, for a long time low temperature, it is necessary to apply water to protect the buds after planting germination (small drying and bud suppression), when the weather is warming up. Namely: "cold soaking seeds, cold germination, warming and broadcasting, strengthen management" 16 words.

For crops, different defense measures should be taken according to the low temperature characteristics of different weather.

Prevention and control technology for open field nursery: A. Dry and cold weather: deep night water insulation, leave shallow water during the day to increase soil temperature, cover seedlings at night, reduce radiation cooling, and cover shallow water during the day. B. Low temperature and rainy weather: Keep the soil moist when there is no wind, and it is not suitable for long-term water accumulation, so that the seedlings grow with sufficient oxygen supply; but if accompanied by cold wind, shallow water irrigation and water exchange should be adopted. C, low temperature and rainy, sharp and cold weather: keep the field moist or shallow water, the day before turning to clear the deep water to protect the seedlings, to ease the dramatic changes in day and night temperature, and then gradually drain and drain in 2-3 days.

Nylon-covered seedling control technology: A. Continuous low-temperature and rainy weather: The nylon film should be sealed to protect the seedlings, and the field water should be drained to prevent waterlogging. B. Low temperature and rainy weather: When the warming is slow and the sunlight is weak, Putian can properly fill in shallow water and proper ventilation; when the eye is warm, the sunlight is strong, and the seedlings are easy to cause physiological loss of water and die, so it is necessary to fill deep water. And ventilation to properly reduce the temperature during the day, and then gradually drain the water. C. Low-temperature dry and cold air: The seedlings in the needle-bud stage are mainly sealed and kept warm and the fields are kept moist; the seedlings above the second leaf age are properly ventilated during the day, and shallow water is poured, and the seal is kept at night.

At the same time, it is necessary to pay attention to improving the ecological environment of Putian and controlling pests and diseases.

Specific weather forecast:

From 08:00 to 6:00 on the 5th, there are light snow (rain) or snow in the west of Xinjiang, southeastern part of the northwest, and central and eastern Jilin; southeastern Tibet, southwestern part of the country, Jianghan, Jianghuai, Jiangnan, and western and northern South China. There are small to moderate rains, including heavy rains in parts of northeastern Hunan and northwestern Jiangxi; 4-5 northerly winds in central and eastern Inner Mongolia and northern North China; and sands in parts of Xinjiang's southern Xinjiang basin Or floating dust.

From 08:00 to 7:00 on the 6th, there is light snow or snow in the west of Xinjiang; there are small to moderate rains in the southwestern part of the country, southern Jianghan, southern Jianghuai, Jiangnan, South China, and Taiwan. Among them, northeastern Guangxi and southern Hunan, Heavy rain occurred in parts of central Jiangxi, southern Zhejiang, northern Fujian and other places; north-central Mongolia, eastern northwest, north China has 4-5 northerly winds; parts of southern Xinjiang basin have sand or floating dust. There are 6 to 7 northeast winds in the southern part of the East China Sea, the Taiwan Strait, and the east side of Taiwan.

From 08:00 to 8:00 on the 7th, there are small snow or snow in the Yili River Valley and the Tianshan Mountains in the Xinjiang and the eastern Heilongjiang River; there are small to moderate rains or showers in the southwestern part of the southwest, south of the south of the Yangtze River, South China, and Taiwan; Some areas have sand or floating dust; the southern part of the East China Sea, the Taiwan Strait, and the east side of Taiwan have 6 to 8 grades and gusts of 9 northeast winds.