As the saying goes, "the year of Ruixue Zhaofeng", it means that snowing is a good sign for a year of agriculture. And what benefits will snow bring to agriculture? Thousands of years of production practice and scientific experiments tell us that snow has "six abilities" in agriculture:
1. Snow can store water and resist drought. Heavy snow falls into the field and becomes a natural mulch, which can effectively suppress the evaporation of soil moisture; when the snow melts, the snow water penetrates into the soil again, increasing the soil moisture. It is very beneficial to the growth of winter wheat, winter rape and other crops, and can meet the demand for water after the crops turn green, and plays a role in water storage and drought resistance.
2. Snow can prevent cold and keep warm. The cedar that has just landed on the ground is soft and has many voids. The air in the void is a poor conductor of heat, which makes the heat in the soil difficult to dissipate, and also prevents cold air from invading the soil. Low temperature infringement is conducive to the safe wintering of crops.
3. Snow can produce nitrogen fertilizer. Snow can absorb a large amount of free gas in the air and form nitrides through chemical reactions. When snow melts, these nitrides will infiltrate into the soil with snow water, thereby increasing soil fertility. According to information, a litre of snow water contains 7.5 ml of nitride, which is five times that of a litre of rainwater.
4. Snow can destroy insect eggs. The snow blocked the flow of air on the surface, and some of the overwintering pests in the soil could suffocate and die. When snow melts, the temperature of the soil is suddenly reduced due to the consumption of a large amount of heat. At this time, pests and eggs on the soil surface and crop roots can be frozen to death, which greatly reduces the pests during the growth of crops.
5. Snow can increase output. According to scientific experiments, there is less heavy water in snow water, and the heavy water (tritium) per kilogram of snow water is one-fourth of ordinary water, and heavy water has the effect of inhibiting the growth of crops. All kinds of crops and fruits have the effect of increasing yield.
Six, snow can improve quality. Irrigating crops with snow water can improve crop quality. It has been investigated that the reason why the cantaloupe and seedless grapes (dried) in Xinjiang are sweet and delicious is that they have a large amount of snow water. Grains and fruits irrigated with snow water will also significantly improve the quality.
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