农谚“瑞雪兆丰年”说明适时适量降雪对农业丰收有利。但是,雪量太大又会给保护地蔬菜生产带来危害,在菜区,立春前后韭菜、黄瓜,辣椒等蔬菜大棚陆续扣上塑料膜,若降大暴雪就会因棚上积雪过多、雪压太大损坏塑料薄膜,特大暴雪甚至压塌棚架,造成严重雪灾。因为每降1毫米的雪,每平方米棚上水平投影面上受到1公斤的雪压,每亩棚上受到667公斤的雪压。若降10毫米的暴雪,每亩棚上 Agricultural proverb “Ruixue Mega Year” shows that timely and appropriate snowfall is good for agricultural harvest. However, the snow is too large will bring harm to the protection of vegetable production in the vegetable area, before and after the beginning of spring leeks, cucumbers, peppers and other vegetable shed plastic buckle one after another, if you reduce the blizzard will shed too much snow on the shed , Snow pressure is too large damage to plastic film, snow storm or even extravagant scaffolding, causing severe snow disaster. Because each drop of 1 mm of snow, per square meter shed on the level of projection by 1 kg of snow pressure, per mu shed by 667 kilograms of snow pressure. If you drop 10 mm of blizzard per acre shed