Planting skills of overwintering lettuce

Lettuce has strong adaptability and can be cultivated in spring and autumn or overwintering, but now it is the time to cultivate overwintering lettuce. The cold resistance of lettuce plants decreases when they grow up. Lettuce that wants to overwintering usually needs to be cultivated in a greenhouse, and it can also be cultivated in open fields in warm winter areas. Generally sowing seeds from mid-late September to early October, before and after the Spring Festival, let's take a look at the planting skills of overwintering lettuce with Xiaobian.

1. Sowing and raising seedlings

Lettuce seeds should be raised and transplanted, and the seedling bed should choose the loam with strong fertilizer and water conservation, loose and fertile loam, using the method of sowing 100-150 grams per mu. Cover a layer of fine soil after sowing, and then cover the rice straw to moisturize, or use the sunshade net to cover the ground to cool and moisturize, remove the mulch in time after emergence, and keep the seedling distance between 3 cm and 4 cm after the seedling is complete. 0.3% urea solution can be applied once to promote seedling growth.

2. Colonization

The land should be ploughed for 5-7 days before planting, and 5000 kg of high-quality organic fertilizer, 50 kg of diammonium phosphate and 15 kg of potassium sulfate should be applied per mu as base fertilizer. The seedling age of overwintering lettuce was controlled at 30-40 days, the leaves were more than 4-5 leaves, and were planted from late October to November. The row spacing was about 33-40 cm. The day before planting, to keep the bed soil moist and cover with plastic film, the seedlings should carry more soil and less root damage, planting should be carried out on a sunny day, and the planting depth should be all buried in the soil, but the heart leaves should not be pressed too deeply, and the soil tip should be pressed on the root to make it fully in contact with the soil.

3. Field management

The greenhouse film should be improved in time after planting, the greenhouse should be ventilated in time in sunny days, and the cold wave frost should be closed and moisturized in time. After the planting survived, diluted dung water should be irrigated 2-3 times to control the temperature so as to prevent the seedlings from growing too much. After half a month of planting, in order to prevent the overgrowth of the plant, a low concentration of multiple frustration or dwarf can be sprayed. If the tender stem is still growing too fast, the listing should be delayed according to the market situation, or it can be sprayed once a month to promote the growth of fleshy stem. In the whole growing period, to keep the soil moist, watering should be controlled before harvest, and fertilizers should be re-applied after one month of planting, with 10-15 kg of urea, 10 kg of potash or 50 kg of plant ash per mu.

4. Harvest

Overwintering lettuce is generally after-sale before and after the Spring Festival, when the top leaves and outer leaves of the plant can be harvested at ordinary times, after harvesting along the border, peel off the lower leaves, so that the stem is exposed, the upper leaves are still retained, keep fresh and easy to sell. If you want to delay the harvest, you can pinch the tip and remove the bud to control the tender stem so as not to grow too high.

The above is the introduction of overwintering lettuce planting skills, hope to help you, want to know more related knowledge, please follow us.