Lettuce is a kind of vegetable that is clear and hot, sweet and sweet. If you use winter greenhouse to grow winter lettuce, the yield and quality will be excellent. It can be sold before and after the Spring Festival, and the economic effect will be much better. So, what methods should be taken to grow lettuce in the greenhouse? Let's take a look at it with Xiaobian.
First, the preparation work before lettuce cultivation
1. Selection of lettuce fields: Lettuce is a vegetable that avoids continuous cropping. It is best to rotate crops with grasses such as rice. The field requires high terrain and convenient irrigation and drainage.
2. Selection of lettuce varieties: Lettuce is suitable for cold-resistant and anti-freeze varieties.
3. Sowing at the right time: Generally, the planting is carried out around September 8-10, and the planting period is around October 15.
Second, the lettuce planting membrane
1. Preparation of lettuce before planting: It is necessary to deepen the soil block one week in advance and apply the base fertilizer once. Then work on the ground.
2. Planting density: The planting density of lettuce is 40cm, the plant spacing is 35cm, and about 5,000 plants can be planted per acre.
3. By mid-December, the winter temperature has dropped very low. At this time, the lettuce plants are vulnerable to low-temperature freezing damage, and it is necessary to cover the greenhouse film in time.
Third, lettuce cultivation management
1. Colonization of lettuce: After the lettuce is planted, the root water is then poured. 5-7 days to apply once to raise the seedling fertilizer, and carry out a soil cultivating. In the early stage of lettuce stem expansion, attention should be paid to fertilizer control.
2. Temperature and humidity control in the shed: Temperature and humidity management is a key measure for lettuce in greenhouses in winter. It should be carefully managed according to plant growth and weather changes. It is necessary to prevent plant growth, and also to manage the lettuce plants, and also pay attention to ventilation. Reduce the humidity.
3. Application of growth regulator: After the lettuce is planted and slowed down, if the temperature is high, it is easy to occur. The paclobutrazol solution can be sprayed once to control the elongation of the lettuce plant.
In addition, in addition to the above field management measures, lettuce cultivation should also pay attention to the prevention and treatment of the downy mildew disease of lettuce. In the usual time, the diseased leaves in the lower part of the lettuce plant should be removed in time to strengthen the management of humidity and ventilation in the winter lettuce greenhouse.
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