The three-membrane watermelon cultivation adopts the outer buckle shed, the small shed in the shed is buckled (the watermelon is planted in a single row and each row buckles a small arch shed), and the cultivation method of the mulching film is covered in the small arch shed. In the cold season, grass sheds are placed on small sheds, and if necessary, grass rakes are placed on the outside of the shed to increase the insulation effect. Variety selection should use varieties with strong growth, easy fruit setting, good uniformity and high yield and disease resistance, such as Kaiza No.5 and Fengshou No.1. Before the sowing of soil preparation, a fine soil preparation was performed. The groove was deep and 40 cm deep along the watermelon planting line. The basal fertilizer was applied to the ditch. Each mu of quality soil fertilizer 5000 kg, 50 kg of diammonium phosphate, 25 kg of urea, 30 kg of potassium sulfate, and then mixed with the soil, the whole cultivation of ridges, planting spacing of 1.8 meters. Timely seedling grafting is usually planted in greenhouses in late January to early February. The rootstock is grafted using squash as the rootstock, and grafting is used for grafting. Watermelon is sowed 5-7 days earlier than the zucchini, and the grafting can be performed when the cotyledon cotyledon flattens and the first true leaf of the watermelon is displayed. Incubation and moisturization within 3 days after grafting, proper light exposure after 3 days, and gradual removal of grasshoppers, can survive after 7-8 days. After the survival, the air was released gradually. After 10-13 days, the roots of the watermelons were cut off. After the new leaves were grown, the grafting clips were removed. After 45 days, they were planted. Generally about 1800 per acre colonization, spacing 1.8 meters, spacing 0.6 meters. Scientific management of pouring water when planting, generally do not water after planting, and once a month after pouring small water. When the size of the watermelon fist is chased after 1 fertilization, 30 centimeters of compound fertilizer is applied at 30 centimeters from the watermelon pier. In mid-April, the small arch shelter was removed. In late April, watermelons began to be marketed. The harvest of the first crop was completed in early May. At this time, the greenhouse can be removed and a second melon can be left after pruning the watermelon. Method is to remove lateral branches, the main vine only stay 50 cm, and then apply 30 yuan compound fertilizer per acre, watering after fertilization. About half a month later, the watermelons can be freshly planted and sit on the second melon. When the watermelon fist size, topdressing 10 kg of urea per acre. In addition, it is also possible to leave a second melon in place after sitting on the first melon for 20 days. Prevention and control of pests and diseases by grafting can prevent the occurrence of blight. For other hazards, chlorothalonil, mancozeb, thiophanate-methyl and other pesticides may be applied alternately for prevention and control. Spray once every 7-10 days after colonization, and combine fertilizer application for extra-root fertilizer application. When watermelons are harvested in time, they can be marked by cutting branches. The first batch of pollination melons is inserted into one branch, and the second batch of pollination melon is inserted into two branches. When the watermelon reaches the ripening days, the sample is opened for inspection, and if it meets the harvesting standards, it can be harvested and listed.
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