How Green Light Affects Floriculture Crops

摘要

Is green light really a safe light for floriculture crops? Researchers at Michigan State University find out the impact it has on daylength-sensitive plants.Many common bedding plants and perennials flower in response to the lengths of the dayand night. When natural days are short, photoperiodic lighting at the end of the day (day extension) or during the middle of the night (night interruption) promotes flowering of long-day plants and inhibits flowering of short-day plants. A combination ofred and far-red light at 1 to 2 umol-nr2-s_1 is usually the most effective at promoting flowering of long-day plants, whereas red light is mainly responsible for inhibiting flowering of short-day plants. In contrast, a higher intensity of blue light (e.g., 30 umol-nr 2-s_1) is needed to create a long day.