The climatic conditions of late autumn cultivation of leeks are very different from the winter and spring early maturing cultivation. After the autumn leeks, the sunshine duration of the leeks grows during the long days of sunshine to shorter days; the light intensity is weaker than the rainy days. The light turns into the bright, sunny and strong light; the temperature changes from the high temperature of the previous period to the low temperature of the late period until the frost finally appears; the humidity is from the early wet and rainy to the late autumn drought. According to the above changes, the planting of leeks in autumn is usually planted in open field. After being emerged, it is covered with a small shed or medium and large sheds for heat preservation to achieve the purpose of delaying leeks harvesting and listing. This method is adopted to cultivate leeks on the basis of conventional cultivation of leeks. Grasping the following points accordingly:
1. Sowing date selection: After planting leeks in autumn, it is important to ensure that the leeks are protected from frost damage under protected conditions, and certain growth individuals have already formed when the outside temperature begins to fall to 12-15°C. Therefore, the sowing date should not be too late, otherwise the leek plants will be frozen to death when the average external temperature is lower than 2°C for a long time in the middle and late growth period of the leek, and the crops will be sown at the latest in mid-September. The harvest period will be in November. From mid- to mid-December. When planting in various places, the temperature period can be searched according to local weather data for the year round, and then pushed forward 60-70 days accordingly to ensure that the leeks are not affected by freezing.
2. Variety selection: After the cultivation of leeks, the leeks are grown under short-day conditions. Therefore, it is required to select medium and late-maturing varieties suitable for growth under short-day conditions. If early-maturing cultivars are selected, Chinese leeks will have early flowering and seeding, which will seriously affect the yield and quality of leeks. According to the experiment, the red leafy leeks of the round leaf type are more suitable for post-autumn cultivation, such as Quanyehong and Dahongpao.
3. Sowing quantity: Anti-season and spring early planting leeks are grown under low to high temperature conditions. They can be sowed in batches and harvested in batches. After the fall, the leeks are grown under conditions of high to low temperatures. Can only sow once, once harvested. And when sowing, the outside temperature is still relatively high, and the relative emergence rate of leeks is relatively high, so the sowing amount is generally 667? O needs 2-2.5kg.
4. Film management: In principle, the small arch shed can be used to cover the heat preservation to promote growth after the seedlings are planted. However, early exposure to high temperature should pay attention to the timely removal of film and ventilation, and the film should be uncovered at 8-9 in the morning. Cover film. When the average temperature of the outside world has steadily dropped to about 12-15°C, the sheds are covered and the cover film is too late. The outside temperature continues to drop. When the leeks plants have not reached a certain amount of growth, and even grow within the shed film, Leek grows slowly and is vulnerable to freezing injury. In addition, during the late growth period of the leek, during the intervening years, sudden cold waves, blizzards and other disastrous weather may occur. Comprehensive antifreeze measures must be taken in a timely manner. For example, water frost protection should be provided 2-3 days ahead of schedule and covered with straw sheds. Add farmyard organic soil miscellaneous fertilizer, and spread straw, straw, etc. on the surface.
5. Interplanting multiple crops: As plastic greenhouses have been widely used in early maturing of vegetables such as eggplant, melons and beans in recent years, the crops of these crops can be used for short cropping, fast-growing and fast-maturing, short plants and suitable crops. For the characteristics of dense planting, fully utilize these protective cultivation facilities and intercropping the leeks. It can not only increase production capacity, but also can make full use of resources such as soil, temperature and light to increase overall economic benefits. It is typical of this model to intercropping and picking out a steamed bun with a longer seedling length in a plastic greenhouse in the off-season cultivation of leeks.
Removable Oxygen Generator
Compressed air is purified through the air dryer and filters to a certain level for main plant to work with. Air buffer is incorporated for smooth supply of compressed air thus to reduce fluctuation of compressed air source. The plant produces oxygen with PSA (pressure swing adsorption) technology, which is a time proven oxygen generation method. Oxygen of desired purity at 93%±3% is delivered to oxygen buffer tank for smooth supply of product gas. Oxygen in buffer tank is maintained at 4bar pressure.
With a cabinet for small capacity or container for big capacity, all the parts can be involved in, and removable with a vehicle.
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Hunan Eter Medical Co., Ltd. , https://www.eter-tech.com