Green onions are strong cold-resistant and adaptable vegetables. They are cultivated all over the country. The scallion (stem) leaves are edible and are also indispensable condiments.
The green onion has a long growth period and slow growth during the seedling stage. If the winter production starts from the seedling, the land occupation time is long and the economic benefit is low. The stems of the onion have the functions of storing nutrients and water, protecting the meristem and heart function, and encountering suitable environmental conditions to produce long-term characteristics. The green onions harvested before winter can be grown in the greenhouse in winter. Green leaves.
The leaves of the green onion are tubular, with small opening degree, suitable for close planting, which can minimize the row spacing of the plants, and the dense planting is called leeks.
The leeks should be planted with small plants with short plants and short stems. Generally, the space on the side of the greenhouse is used, mostly on the north side of the greenhouse road, close to the east and west gables, the front foot is low, and the temperature is lower, the surface soil is taken out, made into a low sorghum, a small amount of farmyard manure is applied, and the flattening is flattened. The dried onions are removed from the yellow leaves and dried leaves, and are densely discharged into the sputum. The soil is buried in the surrounding area and water is poured into the sputum. It is better to have spun yarn sprinkled between the shallots. When the temperature and humidity are suitable, the young leaves grow very quickly. The growth is mainly based on the storage of nutrients in the stems, and the roots absorb less nutrients and water. If the temperature is too high, the age grows fast, but the yield is low; if the humidity is large, it is easy to root. The leeks grow 2 to 3 green leaves until they see the flower buds. They can be harvested according to market needs. Greenhouse leek, the smaller the plant, the higher the yield.
Huaxian Agricultural University Liu Huimin
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