寒露在每年10月8日前后,《月令七十二候集解》一书中说:“九月节,露气寒冷,将凝结也。”此时气温较“秋分”时更低,露水更多,原先地面上洁白晶莹的露水即将凝结成霜,寒意愈盛,故名寒露。华北地区月平均气温已降至15℃左右,10月已开始下霜,露地喜温性蔬菜进入收获末期,耐寒、半耐寒性蔬菜进入生长旺盛季节,寒露节气的菜田农事活动逐渐由露地转入保护地。1日光温室和小拱棚扣棚膜以防早霜为害,日光温室种植番茄、黄瓜、茄子等喜温性作物,要选用保温透光性好的 Cold dew before and after the October 8 each year, “the seventy-second waiting list set solution,” a book said: “September Festival, the cold, will condense too.” Lower, more dew, the original white crystal clear dew will soon condense into a frost, chill more Sheng, named cold dew. The monthly average temperature in North China has dropped to about 15 ℃, frost has started in October, the exothermic vegetables into the late harvest, cold, semi-cold vegetables into the growing season, cold dew climate vegetable activities gradually from open to turn Into the protected area. 1 daylight greenhouse and small arch shed film to prevent premature frost damage, greenhouse cultivation of tomatoes, cucumbers, eggplant and other thermophilic crops, to choose good insulation and translucent