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The benefits of snow to agriculture
Heat preservation and moisture retention

0 1, snow helps to keep the soil warm and has anti-freezing and warm-keeping effects on overwintering crops.

Fresh snow is loose and porous and can contain 40%-50% air. Because air is not easy to transfer heat; Because of the cold weather in winter, snow is often not easy to melt; In this way, the earth is like a big and soft quilt. This kind of "quilt" can prevent the heat in the soil from radiating outward and prevent the invasion of cold air from the outside.

According to the research data of Chinese scientists, the ground temperature observation table is buried in snow-covered land (snow depth 10 ~ 15 cm) and bare land. Results The lowest ground temperature in snow-covered land was-65438 00.3℃, and that in bare land was-17.8℃. Obviously, the ground temperature in snow-covered land is much higher than that in bare land in winter. The characteristics of ground temperature in snow area create a better living environment for winter wheat crops.

Generally speaking, the pitch of winter wheat is about 3 ~ 4 cm deep from the ground. The critical temperature for winter wheat tillers to withstand freezing injury is between-65438 04℃ and-65438 07℃. Therefore, in northern Xinjiang, as long as the ground is covered with10 ~ l5cm of stable snow, the wintering crops can be basically protected from wintering. Without this layer of snow, many wintering crops would freeze to death.

02. The disadvantages of snow on crops.

Snow is both beneficial and harmful to people. In the mid-spring season in March and April, if it suddenly snows because of the cold wave, it will cause freezing cold.

1, plants are easily injured or killed by snow.

2. The farmer said: Lan Xue is a treasure. Chun Xue is not good.

Chun Xue is very vulnerable to the influence of overwintering crops that have experienced a "warm winter". In case of Chun Xue, frost and other bad weather, crops will lose their resistance, resulting in a sharp drop in output. For the growth of overwintering crops, winter snow is a "good medicine" and Chun Xue is a "poison". If there is no continuous low temperature and freezing weather, Chun Xue will not have any adverse effects on crops. "