Cultivation techniques of lotus root in arch shed

The cultivation of lotus root with plastic film in arch shed can advance the market date of lotus root and improve the economic benefit significantly. Selection of lotus root species: Elian No. 1 was cultivated by Wuhan vegetable Research Institute. The main lotus root is 6-7 nodes, 1.3 meters long, 6.5 cm in diameter, 15-20 cm deep in mud, yellowish skin and tender lotus root in the first and middle of July. Elian No. 3 is also cultivated by Wuhan vegetable Research Institute. The main lotus root is 5-6 nodes, 1.2 meters long, 7 centimeters in diameter, 20 centimeters deep in mud, single branch lotus root weighs more than 3 kilograms, the skin is light yellow and white, and the lotus root is harvested in the middle of July under open field cultivation. Flower lotus root is a precocious lotus root species in our province, the main lotus root is 4-5 nodes, 80 cm long, 3-4 nodes, yellow-white skin, open-field cultivation in late July to harvest tender lotus root. Choose lotus root with no disease, no injury, individual hypertrophy, complete terminal bud and complete tail tip as seed lotus root. Land preparation and construction shed: plastic film covered arch shed cultivation, lotus root field with rectangular is better, easy to plan arch shed and field cultivation. Choose a sunny day before and after the Spring Festival to apply enough organic fertilizer, 5000 kg per mu of organic fertilizer, deep ploughing fine rake, irrigation and whole mud, so that the mud layer is deep and keep the melon peel in a state of water. The arch shed is built with bamboo pole, the height of the shed is 1.5 meters, the width is 3 meters, the length is 20 to 30 meters, the distance between the arch sheds is 40 centimeters, and the tension rods are set at the top and waist, which are covered with a plastic film with a thickness of 0.6 mm and a width of 5 meters, and the skirt feet are pressed with soil. Greenhouse lotus root management: 50% of the standing leaves are not fertilized before growing, but attention must be paid to water management to keep the soil in a dilute mud state. Uncover the film and ventilation when the temperature is too high, and store water to prevent freezing before the cold wave comes. After the formation of lotus root leaves, pay attention to ventilation, open the greenhouse film on a sunny day to remove the old residual floating leaves, topdressing urea 30 kg or ammonium bicarbonate 100 kg, calcium superphosphate 100 kg, potassium chloride 50 kg per mu. Pay attention to the control of aphids. In the first ten days of May, the arch shed was removed, and the management was the same as open field cultivation. Harvest and listing in late June to make up for the lack of lotus root market in summer.