Winter greenhouse leeks cultivation

1. Selection of good varieties: use colored sputum with good taste, high yield, strong resistance and cold resistance, such as Dahongpao and whole leaf red of red leaf garden type.
2. Soil preparation and fertilization: Select land with flat terrain, fertile soil, convenient drainage and weeds, and weeding 15-20 cm in early November. Combine deep-plowing per mu with high-quality decomposed organic fertilizer 3000 kg, and diammonium phosphate 25 kg as base fertilizer. . Then make a flat raft with a width of 1 to 1.2 meters, and the surface of the enamel is evenly thin and flat.
3, timely seeding: can be planted in the middle and late November. Pour the bottom water before sowing, use 3 to 4 kilograms per acre, mix the seeds with appropriate amount of fine sand and spread them to the kneading surface. Use the foot to press or cover a layer of dung and cover the mulch. Then use a 2 meter long bamboo strip to support a small arch shed 70-80 cm high and cover the film.
4, strengthen management: on the basis of pouring the bottom of the water, no watering before emergence, 5 to 7 days can be emerged. After the cotyledons were unearthed, the mulch was removed for the first field weeding seedling. When the two true leaves are grown, the second weeding seedling is carried out, and the first fat is chased, and the first water is poured. The general application of 10 kg of nitrogen and phosphorus compound fertilizer is applied in the next 15 days. Fertilizer, 5 kg of compound fertilizer per mu, and each time after harvesting, topdressing and watering once, each time 5 to 10 kg per mu or 10 kg of thin manure and manure. At the end of March of the next year, when the temperature rises, the small arch shed can be removed, ventilation can be strengthened, high temperature burning seedlings can be prevented, and white rust disease of leeks can be prevented.
5, timely harvest: amaranth grows to 4 to 6 leaves, plant height 10 to 15 cm can be listed between the large seedlings, while replanting amaranth, so that it can be harvested in batches until the first half of June. Note that each time you have to keep a small gap between the masters, keep the seedlings evenly, to increase production.