Summary: Lettuce is a genus of lettuce in the family Asteraceae.
One- and two-year-old herbaceous plants, which grow fast and have low requirements for growth space, are also vegetables often grown in home gardening. It likes a cold environment, the suitable temperature for growth is 15-20 degrees, the seeds are more resistant to low temperatures, germinate at 4 degrees, germinate at a suitable temperature of 18-22 degrees, germinate under stress at high temperatures, and almost do not germinate above 30 degrees. The germination method varies depending on the temperature, and it is necessary to refrigerate the refrigerator at high temperatures to promote germination at low temperatures. Before sowing, the seedbed should be carefully arranged and fully watered, and after sowing, a thin layer of soil should be covered and the soil should be kept moist.
Lettuce is a genus of lettuce in the Asteraceae family.
One- and two-year-old herbaceous plants, with large green leaves and crisp raw food, are essential vegetables for Western food, and are also widely produced and applied in China. Lettuce grows fast and has low requirements for growing space, and it is also a vegetable often grown in home gardening. Lettuce likes a cold growth environment, likes low temperature at night, large temperature difference between day and night, does not like high temperature, the suitable temperature for growth is 15-20 degrees, high yield at this temperature, excellent quality. The seeds are more resistant to low temperature, germination can be achieved at 4 degrees, germination temperature is 18-22 degrees, germination is stressed under high temperature, and germination is almost no germination above 30 degrees. Therefore, the method of germination should also be different:
1. Germination at high temperature: the temperature is above 25 degrees, low temperature germination is required, the seeds are packed in a mesh bag, and the mesh bag will soak the seeds in clean water for 7-8 hours, so that the seeds can fully absorb enough water, take out the drained water, wrap it in a wet paper towel or wet towel, put it in the refrigerator and freezer, and promote germination. Pay attention to the towel for the seeds, should be woven with natural cotton fiber, do not use chemical fiber fabrics, the former has good air permeability, and if the air permeability is not good, the seeds will be suffocated and cannot germinate. During the period, pay attention to the dry humidity and keep it moist. After about 5 days, you can see more than 50% of the seeds, and when they have sprouted, you can take them out and sow them.
2. Germination at the right temperature: When the temperature is below 25 degrees, the seeds are packed in a mesh bag, and the mesh bag will soak the seeds in clean water for 7-8 hours, so that the seeds can fully absorb enough water, take out and drain the water, wrap it in a wet paper towel or wet towel, and put it in a cool place to promote germination. Keep the towel moist during this period, it is best to scrub the towel every day, and rinse the seeds in clean water every other day. Observe 1-2 times a day, and see that more than 50% of the seeds have sprouted, and you can take them out and sow them.
Lettuce seeds are relatively small, in order to sow evenly, you can sow together with fine sand in the seeds, fine finishing the seedbed before sowing, fully watering the bottom moisture, covering a thin layer of fine soil after sowing, keep the seedbed soil moist, can not be watered with water, you can use a fine watering can to water slowly, after the germination of the seeds, the conditions are suitable for 4-5 days on the seedlings.