At this time, the earth froze and the pond froze. There is often a "heavy snow" that does not close the land, but it is said to be from the 3rd to the 5th. Once the clouds are overcast, people will feel that there will be magnificent pictures of "Snow overwhelms Bai Yunfei in winter, bloom flowers fall for a while" and "There are no birds in the mountains, no footprints in the thousand paths, a boat with a leaf, a bamboo cloak, and an old man fishing for the cold river-snow" at any time. Once it snows, the scenery in the north is covered with silver everywhere. When you see the snow-covered pine and cypress, you will think of Marshal Chen Yi's poem "The snow presses the pine and cypress, and the pine and cypress are tall and straight", and the integrity of being a man suddenly surges in your chest.
"Heavy snow" means that the weather is colder, and the possibility of snowfall is greater than that of light snow, but it does not mean that the snowfall must be great. On the contrary, after this solar term, precipitation will further decrease, especially in Northeast China and North China. The average precipitation in 65438+February is generally only a few millimeters, and it is even less in the northwest.
As the saying goes, "Xue Rui is a good omen". Snow covers the ground in winter, which can keep the temperature around the ground, especially crops, from falling very low because of the cold current, thus providing a good wintering environment for crops in winter. On the other hand, when the snow melts, it can also increase the soil water content and provide conditions for the growth of crops in spring. In addition, the content of nitride in snow water is about 5 times that of ordinary rain water, which has a certain role in enriching the fields. As a result, there is a saying that "this year's wheat will be covered with three quilts, and next year's steamed bread will sleep."
During this period, except for areas without winter such as South China and South Yunnan, the vast land of the country has been covered with winter clothes. The average temperature in Northeast and Northwest China even reached below-10℃, while the temperature in the Yellow River Basin and North China remained basically below 0℃, and the growth of winter wheat basically stopped. However, the growth of wheat and rape is still slow in Jianghuai and its south area, so attention should be paid to fertilization to lay the foundation for their safe overwintering and next spring growth. At this time, the wheat in South China and Southwest China has entered the tillering stage, so it is necessary to apply tillering fertilizer in conjunction with intertillage, and pay attention to furrow cleaning and drainage of winter crops. Although the weather is cold, the stored vegetables and potatoes should be checked frequently to keep ventilation, avoid temperature rise and excessive humidity, and prevent pit rot. Generally, it is necessary to keep the temperature as low as possible without being damaged by freezing.