2010年4月7～13日,受冷高压脊控制,陕西华县以晴到少云天气为主,由于晚上天气晴朗,地面辐射降温强烈,致使出现了一次大范围的霜冻天气,塬上及山区最低气温降到-2～3℃,持续3～4天,塬下及平原气温1～4℃,持续1～2天,4月13日一些地方甚至出现降雪。霜冻结束后,笔者于4月13～18日对华县马铃薯基地进行了调查,发现马铃薯受害较重,一些严重田块放眼望去几乎全部变成黑色,茎叶好像被开水烫过,经太阳照射后很快 From April 7 to April 13, 2010, controlled by the ridge of cold and high pressure, Huabei County in Shaanxi Province mainly experienced sunny weather and less cloudiness. Due to the sunny weather at night, the radiation intensity on the ground was so intense that a large area of ​​frost weather, highland and mountainous areas appeared The minimum temperature dropped to -2 ~ 3 ℃ for 3 to 4 days, the plateau and plain temperature of 1 ~ 4 ℃, lasting 1 to 2 days, April 13 some places even snowfall. After the end of the frost, the author conducted a survey on the potato base in Hua County from April 13 to April 18 and found that the potato was harmed heavily. Some serious fields were almost black in appearance. The stems and leaves seemed to be scalded with boiling water, After irradiation quickly