During the Chinese New Year, people love to eat leek dumplings, so during the Spring Festival every year is the highest price of leek, last year reached 3.20 yuan / kg. Due to the inconvenience of long-distance trafficking in leeks, the vast majority of them are still produced on-site and consumed locally. Relying on southern food and transporting the goods cannot solve the fundamental problem. Shandong Province, Zaozhuang City, Shanting District, Agricultural Broadcasting School "green card" trainee, Yuchao Village, Yuzhuang Village young farmers Xu Chao, last year, the cultivation of sheds 791 snow owl, listed before and after the Spring Festival, 14,000 yuan per mu income. First, the choice of species. It is better to use high yield, good quality, strong cold resistance, late spring and late winter, spring returning to early spring, 791 snow hoe, Hanzhong winter sorghum, and Pingyu No.2. Second, buckle time. The film buckle shed should be carried out after the nutrients are returned to the roots. In Shandong and other places leeks plant nutrition back to root, generally in mid-late October to mid-November. When the top of the leeks is completely wilted, the buckwheat noodles must be cleaned in time, and the film sheds (in the middle shed, half shed, half-arched shed, etc.) are to be taken in mid-December. The cover film is pulled tightly, and the surrounding pressure is firmly affixed, and the film is further pressed with a lamination line or a presser bar to enhance the windproof ability. The general way of cultivation of leeks in facilities is to cover the first winter after the “rooting†of leeks. It usually takes 45-52 days to harvest the first crop. In Shandong, the first knives are harvested from mid-January to the beginning of February. Third, after the shed management 1, temperature and humidity control. After the shed, the temperature in the shed is increased by using sunlight as a heat source during the day. In the night, the plastic film and grass mulch are used to protect against cold and heat. The shelf temperature should be maintained at 18-28°C during the day and 8-12°C at night. In order to accelerate the germination of amaranth and the growth of new plants, the temperature of the shed should be slightly higher and can reach 30°C after the initial period of the shed and after each harvest. Before harvesting, the temperature should be lowered to make the leaves grow strong and free from lodging and rot. The temperature is adjusted by opening and closing the grass cover and the opening and closing of the ceiling film. From the shed to the two crops before harvest, the outside temperature is low, and it is necessary to cover the straw curtain early, and not let it go or put a small breeze. Snowy days may not reveal the straw curtain. If the continuous cloudy snow is 3-4 days, the shed is in a wet and cold state, and it is easy to pick up the roots. When the outside temperature is slightly higher at noon, some grass curtains and membranes are opened to remove moisture. The relative humidity in the shed should not exceed 65% as much as possible to prevent the emergence of grey mold in leek. After the temperature rises gradually in early March, the amount of ventilation should be increased, and the straw curtains should be gradually removed. In late March-early harvest of the first 3 days, the film can be removed and replaced with open field cultivation. The management after the withdrawal is basically the same as the open cultivation of leeks. 2, fertilizer and water management. The cultivation of leek mainly depends on the accumulation of nutrients in leek plant bulbs and roots, as well as the accumulation of water and nutrients accumulated in the soil by the frozen water before the shed. Before harvesting the second crop, it is generally no longer top-dressing with water. Before the shed, if the fertilizer does not keep up, the plant growth is weak. After harvesting 1-2 knives, appropriate dressing and watering should be performed. Topdressing fertilizer such as urea and ammonium bicarbonate or composted manure can be used. After top dressing, water should be cultivated in time and properly ventilated to avoid excessive moisture in the shed and cause diseases such as rot. Fourth, pest and disease control. Diseases of cultivated leek are mainly leek gray mold. Can be used 50% of the speed of WP wettable powder 1000-1500 times, 90% of the gray mold Ling 500 times or 50% fluocin 1000-1300 times spray control. Generally sprayed once every 7-10 days, even spray 2-3 times. Its pests are mainly crickets. The use of adult crickets during the eutrophic period is mostly concentrated on the habit of crawling on the ground. At 9-11 am, they are sprayed with 2.5% emulsifiable milk 4000 times solution on the ground near the rhizosphere for control.
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