Low temperature sprouting technology of lettuce

The germination temperature of lettuce and celery seeds ranged from 5 ℃ to 25℃, and germination was hindered above 30℃. Summer and autumn lettuce, celery sowing temperature is higher, the seeds of low temperature treatment, can make its early emergence, emergence Qi. Low temperature treatment should first wrap the seeds with gauze, put them in well water for soaking, and the water temperature is lower than 25℃. Soak lettuce seeds for 5~6 hours, celery seeds for 10 hours, and then germinate at low temperature. There are three methods of germination, which can be selected according to the actual situation. One is to wrap the seeds with gauze and put them into a cold storage at-5℃~-3℃ for 24 hours, and then put the frozen seeds indoors to melt, and they can germinate in 2~3 days. The second is to put the wet gauze wrapped seeds in the refrigerator preservation room, keep it at 15~20℃, and germinate in 3~5 days. The third is to wrap the seeds with wet gauze and hang them in the well, 30 cm away from the water surface in the well, and they can germinate in 3~5 days. In the process of germination, we should replenish water in time, wash the seeds at least once a day, and let the seeds see the light properly in the middle. After germination suitable moisture sowing, after sowing cover straw curtain moisture, conditional can build 1 meter high awning, in order to facilitate germination.