Cultivation technique of lotus root in greenhouse

1, scaffolding. Before scaffolding, the base fertilizer should be applied, and the large and medium-sized tractors should be used for rotary tillage. The depth should be uniform and the ground should be spared. Among them, the greenhouse shed is 6 meters wide and above, the height is 2-3.3 meters, and the spacing between the sheds is 0.5 meters. The row spacing in the shed is 1.5-1.6 meters, and the hole spacing is 0.6-0.7 meters. The plastic film is covered, and the steel or bamboo piece can be used for the scaffolding. It is suitable to be built in the north-south direction. The small arch shed has a width of 1.1-1.2 meters and a height of 0.5-0.6 meters, and a 0.2-0.3 meter operation lane is left between the sheds. The plastic film is covered, and the bamboo frame for the scaffolding is suitable for the north-south direction. Each row is planted in a row with a hole distance of about 0.8 meters. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
2. Variety selection. For cover cultivation, it is preferred to use early-maturing lotus root varieties with strong adaptability, shallow mud, short petioles and strong resistance to disease and lodging. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
3. Apply enough base fertilizer. 7-10 days before transplanting, 2000-2500 kg of simmered manure per acre, 50 kg of quicklime, if the organic manure is higher fertilized chicken manure or rapeseed cake fertilizer is reduced to 300-400 kg, but must be completely decomposed, And watering deep ploughing more than 20 cm. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
4. Timely planting. Among them, the average daily temperature in early spring in open field cultivation can be planted when it rises above 15 °C. The central part of Zhejiang Province is about mid-March, south of Zhejiang in early March, and late Zhejiang from late March to early April. The average daily temperature in the early spring of greenhouse cultivation can be planted at 12-13 °C, which is more than 15 days earlier than the shallow season. The temperature of the small arch shed can be planted at 13-14 °C, 7-10 days ahead of the open field cultivation. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Apply the glutinous noodle fertilizer before transplanting, and plow the rice noodles. Apply 100 kg of ammonium bicarbonate per mu, 30 kg of superphosphate, 10 kg of potassium sulfate, 1 kg of borax in the boron-deficient area, and 1 kg of zinc sulfate in the zinc-deficient area. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
5, divided into topdressing. Generally top dressing 2 times. The first time was applied in the first leaf-leaf stage, and 10 kg of urea per acre was applied. The first time was applied before the lotus leaf was sealed, and 15-25 kg of compound fertilizer per acre was applied. Appropriate shallow water when fertilizing. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
6, temperature management. The floating leaf period of greenhouse cultivation is mainly based on sealing and heat preservation, which is cold-proof and warm, and generally does not expose the film. If cold flow is required, it should be properly irrigated. Check the shed film in time after strong winds. After the first leaf is fully unfolded, pay attention to ventilation to prevent high temperature injury. At noon on sunny days, the outdoor temperature reaches 25 °C or the temperature in the shed is higher than 32 °C, and the ventilation and cooling work should be done in time. When two or three leaflets grow on the main whip, open two ventilated refineries every day. After 3 pieces of leaves, the outside temperature rises, and a film is opened during the day to prevent burning of the seedlings and to keep the film sealed in the evening. When the average daily temperature is stable through 23 ° C, the film is completely uncovered. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
The small arch shed is covered with a perforated film with a hole diameter of 0.6 cm and a hole of 6 cm. In the seedling stage, the air-tightness is mainly used. After the first piece of the leaf is unfolded, the temperature of the shed should be more than 30 °C. The aponeurosis should be ventilated; once the apical membrane is placed, the membrane should be smeared in time. Before the film is completely uncovered, the smelting work of the Japanese night cover will be completed 3-5 days in advance. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
7, water management. The cultivation of greenhouses should follow the principle of “light-deep-shallow”. In the early period of sunny and hot weather, the shallow irrigation is mainly, the water depth is 3-5 cm; when the temperature is low, the water is protected and the water depth is 10-20 cm. During the growth period of the lobes, the water level increased to 10-15 cm. The knotting period should be shallow, the water depth is about 5 cm, and the lotus root is swollen. Putian irrigation, to prevent cross-irrigation. Linyi Fertilizer Network Copyright
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