Lotus root is the aquatic vegetable that is second only to white rice in our province. In recent years, with the promotion and application of facility cultivation techniques, the harvest time of lotus root has been advanced to May-July, and the market price has greatly increased, and it has achieved two revenues a year. The benefits are very significant. 1, scaffolding. Before scaffolding, the basal fertilizer should be applied to require large- and medium-sized tractors to rotate and plough. The depth should be even and the site should be set aside. Among them, the greenhouses are 6 meters wide and above, 2-3.3 meters high, and 0.5 meters between tents. The sheds are planted 1.5-1.6 meters apart and the hole spacing is 0.6-0.7 meters. Covered with plastic film, scaffolding with steel or bamboo can be constructed in a north-south direction. The small arch sheds are 1.1-1.2 meters wide and 0.5-0.6 meters high, and the 0.2-0.3 meter operation lanes are reserved among the sheds. Covered with plastic film, scaffolding with bamboo, north-south direction is appropriate. Each shed is planted in a row with a distance of about 0.8 meters. 3, Shizu base fertilizer. 7-10 days before transplanting, 2,000-2,500 kilograms of mature manure per acre, and 50 kilograms of quicklime. If organic manure is higher fertility chicken manure or rapeseed cake manure, it is reduced to 300-400 kilograms, but must be fully decomposed, And irrigation deep plowing more than 20 cm. 4, timely planting. Among them, the average daily temperature in the early spring of open cultivation can be raised above 15°C. In mid-Zhejiang, about mid-March, south Zhejiang in early March, northern Zhejiang in late March and early April. The average daily temperature in greenhouse cultivation in the early spring can be raised to 12-13°C, and it can be planted more than 15 days earlier than the single-season cultivation in shallow water. The temperature of the small greenhouse cultivation can be raised to 13-14°C, which is 7-10 days ahead of open cultivation. Before transplanting, apply enough noodle fertilizer to cover the flat surface. Apply 100 kg of ammonium bicarbonate per mu, 30 kg of superphosphate, 10 kg of potassium sulfate, add 1 kg of borax to the area with boron deficiency, and add 1 kg of zinc sulfate to zinc deficiency areas. 5, divided fertilizer. Generally top dressing 2 times. The first time the first leaf was applied in the leaf spreading stage, 10 kg of urea was applied per mu, and the first time was applied before the lotus leaf was sealed. The compound fertilizer was applied at 15-25 kg per mu. Appropriately put shallow field water when fertilizing. 6, temperature management. The leaf floating period of greenhouse cultivation is mainly sealed and insulted. It is cold and warm, and it is generally not uncovered. If it is cold, it should be properly irrigated and kept warm. Check the film immediately after the wind. After the first leaf is fully deployed, pay attention to ventilation to prevent high-temperature injury. At noon on sunny days, the outdoor temperature reached 25°C or the temperature in the shed was higher than 32°C, and ventilation and cooling work was done in time. When the main scorpion grows 2-3 leaves, two ventilation holes are opened every day. After 3 vertical leaves, the outside temperature rises, and one side of the film is opened during the day to prevent burning of seedlings and heat preservation in the evening. When the average daily temperature is stable at 23°C, the film is completely removed. The cultivation of small arches was covered with a perforated membrane with a hole diameter of 0.6 cm and a hole of 6 cm. Closed insulation is the main seedling stage. After the first leaf is unfolded, both sides should be ventilated with membranes when the temperature in the shed is higher than 30°C. Once the top leaf membrane is set, the membrane should be lifted in time. Before unveiling the film completely, do a good job 3-5 days ahead of time to complete the hardening work of the day. 7, water management. Cultivation of greenhouses should follow the principle of "shallow-deep-light". In the early days of hot and sunny weather, shallow irrigation is the main method and the depth of water is 3-5 cm. When the temperature is low, the water is nursed and the water depth is 10-20 cm. When the leaves are growing, the water level increases to 10-15 cm. The clams should be shallow, with a water depth of about 5 cm, in order to facilitate the expansion of lotus roots. Putian irrigation, to prevent string irrigation.
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2, species selection. Covering cultivation should choose the early-maturing lotus root varieties with strong adaptability, shallow into the mud, short petiole, and strong resistance to lodging and lodging.