特色生菜是奶油生菜、紫叶生菜、玻璃生菜、散叶生菜、直立生菜、野生生菜、花叶生菜等多种不结球生菜的总称。大多数特色生菜品种适应性广,生育期短,播种后50天可采收,是露地和保护地加茬、赶茬、间作套种的最佳特菜作物。特色生菜是半耐寒性蔬菜,喜冷凉,忌高温,最适宜生长温度为16～22℃,夜间为10～12℃,能耐30℃高温和 Characteristics lettuce cream lettuce, purple leaf lettuce, glass lettuce, loose leaf lettuce, upright lettuce, wild vegetables, lettuce and other non-cotyledons lettuce collectively. Most characteristic lettuce varieties have wide adaptability, short growth period and can be harvested 50 days after sowing. They are the best special crops for stubble planting, stubble cutting and intercropping. Characteristics of lettuce is half cold vegetables, like cold, bogey high temperature, the most suitable growth temperature of 16 ~ 22 ℃, 10 ~ 12 ℃ at night, capable of 30 ℃ high temperature and