In the early spring, March is warm and cold, and the southern rice is to be planted in the sky.

It is expected that from March 31 to April 3, there will be a strong cold air affecting the central and eastern regions of China from north to south. The northwestern region, Inner Mongolia, Northeast China, North China, Huanghuai, Jianghan, Jianghuai and other places will appear 8 to 10 successively. The temperature drop of °C, in which the central and eastern parts of Inner Mongolia, the Northeast, and most of North China have a cooling range of 12 to 14 °C, and the local area can reach 16 °C.

According to the latest forecast, the weather in the south is mainly from sunny to cloudy weather, and the temperature is on the rise. It is suggested that the southern early rice planting area should seize the favorable opportunity to recover from the recent temperature rise. However, it is not suitable for planting areas. It is also necessary to use sunny weather to select sun-dried seeds, carry out seedbed cleaning and cultivate soil and fat work to ensure the smooth progress of spring sowing. It is estimated that on the 2-3rd day, due to the influence of cold air, most of the south of the Yangtze River will experience a small to moderate rain process, and some areas will have heavy rain; in most areas, the temperature will drop by 4-6 °C, central and northern Hunan, north-central Jiangxi, Zhejiang, northern Fujian, etc. The average daily temperature of the ground is about 10-11 ° C, lower than 12 ° C; the average daily temperature in the southern part of the Yangtze River is generally 12-13 ° C. It is suggested that early rice that has been sown should pay attention to the cold-proof work during the cold air impact period, cover the Putian plastic film, increase the application of hot phosphorus and potassium fertilizer, improve the cold resistance of the seedlings, and prevent the rotten species. After the 4th, the weather in the Jiangnan area improved again and the temperature rose.

In addition, in the next three days, most of the northern regions will have northerly winds of 4 to 5 and gusts of 6 and some areas in Inner Mongolia and northern North China. In eastern and southwestern Tibet, there will be rainy (snow) weather, and precipitation in some areas will be large. Tibet, Yunnan and western Sichuan need to strengthen geological disasters such as landslides and mudslides. In the northern part of Xinjiang, there will be cold air impact in the past two days, and it is necessary to prevent the adverse effects of dust and dust on transportation, facilities and agriculture.