Planting techniques of leek in greenhouse

Due to the needs of the market, in recent years, leek can be planted in more and more areas, of which the most common is greenhouse planting. The following is the editor to introduce the greenhouse leek planting technology!

1. The choice of leek field.

The site of leek in greenhouse should choose sandy loam with convenient transportation, good irrigation conditions and rich organic matter. The border is built in the north-south direction, with a width of 1.5 meters, a width of 0.6 meters and a length of 30-40 meters, with a greenhouse built every 2 borders.

2. Raising roots and strong seedlings

Leek root needs more fertilization to promote its rapid growth, accumulation of nutrients, every 667 square meters, 30-40 kg diammonium phosphate and 40-50 kg urea. When the root seedlings grow, we should stop watering and topdressing and control the growth so as to promote the nutrients in the leaves and pseudo-stems to return to the bulbs and roots, promote the bulb expansion and root growth, and cultivate strong plants.

3. Buckle membrane

The appropriate time for buckling film should be before the local first frost. If the buckle grows early, the yield peak comes early, and it is easy to senescence; if the buckle suffers from cold injury in the open field, it is easy to cause leaf tip rot, and once the leek turns into passive dormancy, it grows slowly after buckling the film.

4. Harvest management

Generally, you can make a shallow cut before buckling the film, and buckle the film immediately after harvest, so that it is easy to operate. If the leek has not reached the harvest standard, the film should be buckled first in order to prevent frost injury, but it must be operated carefully to prevent damage to the leek plant. In the initial stage of buckling film, the indoor temperature is higher, so it is necessary to strengthen ventilation to prevent excessive growth, and generally maintain no more than 25 ℃ during the day. With the decrease of external temperature, the air release volume was gradually reduced, keeping 20-25 ℃ in the daytime and 5-10 ℃ at night.

With the decrease of external temperature, the turf is covered at night and covered early and uncovered late to strengthen the thermal insulation performance. After the leek is covered with plastic film in winter, it still needs to be fertilized and watered. Winter production of leek, if the growth is strong, the harvest period can be extended from October to February-March of the following year, after harvesting and cutting off leek roots, fruit and vegetable production. Attention should be paid to the shallowness of the knife for each harvest so as not to affect the growth of the next crop.

5. strengthen the prevention and control of diseases and insect pests

When planting leek in greenhouse, we should pay attention to the prevention and control of Botrytis cinerea, which can be fumigated with Sukeling fumigant after each watering, and the disabled body should be removed in time. Peel off the diseased leaves during each harvest and bury them deeply. If Botrytis cinerea has occurred, spray 1000 times of 50% Sukeling or 50% Prohydantoin wettable powder immediately.

Due to the different temperatures in different areas, when planting leek in the greenhouse, we need to combine the local climatic conditions and reasonably control the temperature and humidity in the greenhouse.