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First, prepare before planting. Choose fields with fertile soil, convenient drainage and irrigation, and no watermelon planted within 2-3 years. If heavy cultivars are to be grafted and cultivated, the occurrence of wilt disease should be prevented. Select early-maturing, high-quality, medium and small fruit varieties, such as special Xiaofeng, Huang Jingxin, early good 8424, disease-resistant Su Mi and so on. On the basis of deep plowing before winter, about 15 days before transplanting, fine soil preparation and adequate basal fertilization will be applied. Each acre will be applied with 3,000-4,000 kg of high-quality soil-fertilizer, 15 kg of urea, 50 kg of superphosphate, and 20 kg of potassium sulfate.
Second, nurture strong seedlings. Generally in late February, broilers are used to raise seedlings. (1) Seedbed construction. Select leeward sunny, high dry terrain, well-drained place to build a bed. Dig 30 cm from the ground surface to fill the brewing material (McMill: fine soil is 1:1, sprinkle with water, humidity is suitable for gripping underwater drops.) The brewers were filled with 20 cm thick and covered with 3-4 cm thick fine soil on top. From the surface of the wall, the height of the north is from the south to the south, and the upper support is inclined to cover the plastic film to keep the light warm. Seed brewing materials should be filled and covered with membranes 7 days before sowing. The nutrient soil is packed in the upper layer of the seedbed brewing material and sowed in the nutrient soil, and sowed into the melon seeds that have been disinfected and germinated. (2) Seedbed management. The focus of its management is on insulation, and at night the film should be covered with grasshopper insulation and opened during the day. Pre-emergence temperature is controlled at 28-32°C during the day and 15-18°C at night. After the emergence of 20-25 °C during the night, 15-18 °C at night. The weather is fine to be properly ventilated to reduce the temperature inside the seedbed, prevent diseases and "high-legged seedlings." Diseases such as blight may be controlled by chlorothalonil. Strong seedlings standard: Seedling age 30-35 days, 3-4 true leaves, thick stems, leaf hypertrophy.
Third, colonization. It is usually planted at the end of March and early April. Cover the mulching film (50 cm wide) 7-10 days before transplanting to facilitate heat preservation. Choose sunny morning punching and placement of nutrients, require pouring enough water, seal the planting holes, and the pods are leveled with the ridge surface after the earthworms are in the ground. The spacing is 2.5 meters, the spacing is 0.35 meters, and about 750 plants are planted per acre. (1) Temperature regulation. 3-5 days after planting and transplanting, airtight insulation is the main method. The temperature is controlled at 25-30°C during the day and 15-30°C during the night. Excess ventilation above 30°C is required. When the outside temperature is stable at 20°C, remove the small shed. (2) Pruning pressure vines. A main side double vine pruning was used, and the main stem 25-28 section was plucked. Timely management of vines, each vine grow 30-50 cm pressure vines need to press 1 time, leaf vines to long weight. (3) Artificial pollination. When there are few insects on rainy days, artificial pollination should be performed. (4) Select melons and stay melons. In general, each fruit type leaves 1 melon, and the small fruit type leaves 2 fruit-type melons, timely fruit thinning. (5) fertilizer and water management. Re-expanding melon fertilizer, when the watermelon fruit diameter of 4-5 cm when the expansion of the application of good melon fertilizer, apply 10 kg of urea per mu, potassium sulfate 10 kg. (6) Prevention of pests and weeds. In spring, the number of pests and diseases of watermelon is less. In case of low temperature and rain, it is necessary to use potassium dihydrogen phosphate and mancozeb mixed solution to prevent disease. Plants were cultivating and weeding 2-3 times before spreading. (7) timely harvest. The ripening period of watermelon is generally in early June, picking is best in the morning.
Watermelon early spring double-film covering cultivation than the ordinary open-cultivated watermelon market in the morning about 1 month, acres of net income increased by 1,500 yuan or so, and Teng Hao early, easy to arrange the next chant.