一、黄瓜。是典型的喜温性蔬菜，对温度要求比较严格，生长发育最适温度 18～ 32℃，在 12℃以下生长缓慢或停止生长， 5℃以下有受冻害的危险。不同生育时期对温度要求也不一样，种子发芽最低温度为 13℃，最适宜温度是 28～ 30℃， 35℃以上发芽率反而降低；幼苗期适宜温度 First, cucumber. Is a typical temperature-sensitive vegetables, the temperature is more stringent requirements, the optimum temperature for growth and development of 18 ~ 32 ℃, slow growth below 12 ℃ or stop growing, 5 ℃ below the risk of frost damage. The temperature of different growth stages is also different, the minimum temperature of seed germination is 13 ℃, the most suitable temperature is 28 ~ 30 ℃, the germination rate of 35 ℃ or more is reduced; seedling temperature