Watermelon is the favorite of people for antipyretic and heat-clearing. It is not only nutritious, but also has good medicinal value. However, watermelons cannot be cultivated again, causing difficulties in the greenhouse production of watermelons. To solve the annual production of watermelons, the Beidaihe Jifa Agricultural Comprehensive Development Co., Ltd. of Hebei Province has successfully tested the science and technology demonstration base and planted four cultivation techniques once harvested. This technique is based on fertilizer and water management and utilizes the germination of vines from latent buds of new vines or basal leaf pods that germinate on aged shoots. In general, the vine is cut after harvesting and the new vines can be smoked within 7-10 days, and the lower pods can be harvested within 40-45 days. Planting varieties of Hong Xiaoyu: The characteristics of this variety is strong growth, disease-resistant and high yield, single fruit weight 1.5 kg, sweet and juicy, sugar content of 13 or more, more resistant to storage and transportation. The specific management of the first batch of watermelons: nursery. Seed sowing in late November, seedling age 30 days planting. 1 soaking and germination: soaking in warm water of 55°C for 15 minutes, soaking at room temperature for 4-5 hours, germinating at 28°C-32°C for 24 hours, germinating and whitening; 2 sowing: 0.1% one day before sowing The thiophanate-methyl solution is soaked in nutrient solution, then sowed, exposed 1.5 cm, daytime temperature 28°C-32°C after sowing, night temperature 15°C-18°C, proper ventilation after emergence, reduced temperature, 25°C during the day, 15 at night °C to grow young seedlings. Site preparation and planting. 1 Site preparation: on the basis of universal cultivation, a mixture of fermented chicken manure and soil (1:1) per 5 mu of Pushi, and after spreading, a turtle ridge with a height of 13-15 cm and a width of 1.2 m should be used. Ditch width 40 cm; 2 planting: double row ridge planting, row spacing 34 cm, spacing 40 cm, 2230 acres planted. Set planting selection in the sunny morning, ditch watering, muddy seedlings, after 2 o'clock in the afternoon after sealing, covering the mulch after sealing, film width 90 cm, generally do not plant in the afternoon; 3 after planting management: after planting Pay attention to warming and heat, during the day 25 °C -28 °C, 15 °C -18 °C at night, to be appropriate ventilation after the slow seedlings, planting water pouring, not pouring water, to prevent lowering the temperature, until the extension of vines can be poured once the water. Small watermelon growth is weak, suitable to stay more vines, so the pruning should be light, leave 5 to 6 leaves when the real leaves leave 5 topping, generally using two vine pruning, when the child vines grow to 40-50 cm left two The sturdy vines are all removed. Avoid watering during flowering, until the baby grows to fist size, combined with fertilization pouring 1 times water, water can be poured more than appropriate, top dressing 35 kg compound fertilizer per acre, 5 kg of urea, 1 kg of potassium dihydrogen phosphate. Pruning hang vines. The application of greenhouse vines is not pressure vines, each plant two vines, to be vine leaves grow to 15-20 leaf period to stay melon, each vine to stay a melon, flowering, 8-9 am artificial pollination, not later than 11 o'clock After leaving 18-20 leaves in the upper part of the melon to promote melon growth. Harvested. Planted in early March, harvested in early May, mature 40 days after flowering, yield 1500 kg per mu. The second trick: cut vines. After harvesting the first crop, one of the sturdy vines was selected to be cut at about 4 leaves and cut off to remove all old lateral vines and leaves, usually in mid-May. Cultivation management. After cutting vines, pour water once and combine with fertilization. The water should be poured more properly. Apply 35 kg of compound fertilizer per acre, 5 kg of urea, 1 kg of potassium dihydrogen phosphate, keep the temperature at 25°C—30°C during the day, and 18°C—20°C during the night. , Properly put out dampness. After cutting vines, in the new side vines that germinate again, choose to keep two strong vines to promote growth, and timely vines, timely control of pests and diseases. Harvested. This melon is ripe for ripening. In the middle of May, the vines were cut. In early July, the melons were ripe for harvest. The yield of the second crop was still 1500 kg. The third trick: cut vines. After the second harvest, one of the strong vines was selected in mid-July, leaving 1 foot on it and cutting off with scissors to remove other vine leaves. Cultivation management. After cultivation, management, watering and fertilization are the same as above, but at this time, during the rainy season, ventilation, dehumidification, cooling, and flood prevention become the primary tasks, and pest control is strengthened. Harvested. Harvested in late August, yielding about 750 kilograms per mu. The fourth battle: cut vines. In early September, cut vines in the same way as above. Cultivation management. After cutting watering and fertilizing, the amount of fertilizer can be properly reduced, 20 kg of compound fertilizer per mu, 5 kg of urea, and 1 kg of potassium dihydrogen phosphate. The emphasis is on the heat preservation and warming, especially the night temperature, otherwise the female flower pollination is poor, and the melons will be pollinated. Long after the top-dressing of eggs, fertilizer, Mushi urea 3 kilograms, potassium dihydrogen phosphate 2 kilograms, in order to promote leaf protection long leaf melon. Harvested. In mid-late-November, the output was 550 kg and the output of the fourth crop was low, but the price was high in winter and the benefit was good. Pest control pests. Locust, spray once again net. Disease. 1 damping-off disease: 64% anti-virus scorpion; 2 wilt disease: smashing standing dry pouring root; 3 anthrax: 80% anthrax Fumei; 4 powdery mildew: 75% chlorothalonil.
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