Snow can also store water for crops. In addition, snow can enhance soil fertility. According to the determination, every 1 liter of snow water contains about 7.5 grams of nitride. Snow water permeates the soil, which is equivalent to applying nitrogen fertilizer once. Feeding livestock and poultry with snow water and irrigating crops can obtain obvious benefits.
At the same time, sufficient snow and water in winter can not only alleviate the drought in that year, but also provide favorable conditions for timely sowing and full seedling growth of spring-sown crops in the coming year.
2, human health: often taking a bath with snow water can not only enhance the resistance of the skin and the body, reduce diseases, but also promote blood circulation and enhance physical fitness. Drinking clean snow water for a long time can prolong life. This is one of the "secrets" of the old people who have lived in the deep mountains and forests for a long time.
In fact, snow has other medical functions. It can remove fire, improve eyesight, reduce blood fat and so on.
According to the measurement, the density of new snow is generally 0.05-0. 10g per cubic centimeter. Therefore, the reflectivity of ground snow to sound waves is extremely low, which can absorb a lot of sound waves and help reduce noise.
3. heat preservation: snow is like a wonderful carpet, covering the ground, so that the temperature of the ground will not drop too low because of the cold in winter. This heat preservation effect of snow is inseparable from its own characteristics.
As we know, any object itself can transfer heat, and this property of transferring heat is called the thermal conductivity of the object. Among several common substances in nature, air has the worst thermal conductivity. Therefore, the more air an object contains, the worse its thermal conductivity. Because the amount of air contained in snow changes greatly, the thermal conductivity of snow also changes greatly. Generally, the newly fallen snow has large pores and the best heat preservation effect. In the late stage of snow melting in spring, snow is soaked by water, and its thermal conductivity is closer to that of water, so the thermal insulation effect of snow tends to disappear.
Extended data
Snowflake is a kind of beautiful crystal, which sticks together to form snowflake during falling. The size of a single snowflake is usually between 0.05 and 4.6 mm, and the snowflake is very light, with a single weight of only 0.2-0.5 g. No matter how small a snowflake is, it is wonderful. Its crystals are all regular hexagons. Therefore, the ancients said that "there are five flowers in vegetation and six snowflakes".
proverb
"Xue Rui heralds a bumper harvest year" is an agricultural proverb widely circulated in China. In the north, a thick layer of loose snow is like covering wheat with a quilt to keep out the cold. Nitrogen contained in snow is easily absorbed and utilized by crops. The low temperature of snow water can freeze the overwintering pests on the surface and bring many benefits to agricultural production. So there is another agricultural proverb, "cover three beds of wheat in winter and sleep with steamed bread in the coming year."
Reference materials? The role of snow-Baidu Encyclopedia