1 Select fine varieties.
The cultivation of leek in greenhouse should choose high-yield and high-quality varieties with strong tillering ability, cold tolerance, heat tolerance, good stress resistance, thick leaves and good quality. Such as: Ding Feng, Pingjiu 1, No.2, No.4, Saisong, Xuejiu, Aodong 1, etc.
2 Seedlings sowing and methods
Sowing and transplanting methods are adopted in production, and China Agricultural Network thinks that the separation method of mother plants should be eliminated as far as possible.
2. 1 Good seedling and strong seedling.
Choose new seeds with bright colors and full seeds when sowing. The seedbed in the nursery must be well drained, fertile, loose, moist, breathable and high in organic matter. When preparing soil, combine fertilization, plow to a depth of 30cm, and carefully rake and plough furrows. Every 667㎡, 2000kg of high-quality decomposed organic fertilizer, 20kg of urea 15kg, 20 kg of potassium sulfate compound fertilizer and 50kg of phosphate fertilizer are applied, the soil is deeply ploughed and watered, and the soil is sowed 2-3 days after loosening. Sowing can be carried out from the beginning of April to the beginning of August every year. Dry sowing is adopted, with the row spacing of 25-30cm and the depth of 3cm, and the seeds of 667m2 are 4-6kg. In order to make the seedlings neat, Miao Zhuang and uniform, the seeds can be mixed with 2-3 times the amount of sand when sowing, then evenly spread in the ditch, and then covered with fine soil about 2 cm thick after sowing. After sowing, water in time, cover with plastic film to keep moisture, so as to facilitate the emergence of seedlings. After all the seedlings are in place, remove the plastic film in time to prevent the seedlings from burning.
2.2 Strengthen seedling management
The key point of seedling management is watering and weeding. When the leek is unearthed, it should be watered lightly, and then watered once after the surface turns white, and once 2 ~ 3 days before emergence to keep the soil surface moist. With the growth of seedlings, gradually extend the number of watering days and increase the amount of watering. From seedling qi to seedling height 15cm, water was irrigated for about 7 days at a time according to the surface dryness and wetness, and nitrogen fertilizer was applied at the same time, and irrigation was 3kg/667㎡. After beginning of autumn, the combined water was topdressing twice, and 4 kg of nitrogen fertilizer was topdressing every 667㎡. At the same time, weeds in seedbed should be pulled out in time after emergence to facilitate the growth of leeks. Weeds can also be controlled by using 33% Shi Tian cloth EC 100 ~ 150 ml and spraying 50kg of water evenly every 667m2 before the leek is covered with plastic film. Do not harvest before planting, in order to "grow roots and strengthen seedlings." In the meantime, if there are leek flowers, they should be picked in time and watered with winter water before the soil freezes.
Leek is a vegetable crop of garlic. It contains vitamins, minerals, sugar, protein, cellulose and some trace elements. It is not only nutritious, but also has a unique flavor, which can stimulate appetite and is deeply loved by people. Leek is a perennial perennial plant, with tender leaves, moss and flowers as edible vegetables, which has strong adaptability and can be cultivated in all kinds of soils. Leek is an indispensable vegetable in people's life because of its simple planting method and wide use, and it is in demand all year round. Different physiological characteristics and dormancy periods of Chinese chives will inevitably lead to the contradiction between supply and demand in the market.