Variety selection
Late-maturing varieties with strong growth, high yield, disease resistance and high quality should be selected, such as Jingfengbao, Jinglongbao and Jingmibao.
Build and dig
1 built a shed. Select the sandy loam with high topography and good irrigation and drainage conditions, and carry out planting in the north-south arched greenhouse. The shed is 6.8~13.6 meters wide, the arch height is about 2 meters, the shed length is 40-50 meters, and the shed film is made of 0.07 mm polyethylene without drip film.
2 fertilization. After the harvest of the former sorghum crop, it will be over 20 cm deep, and the hoe will be leveled 2 to 3 times. Each 1/15 hectare (1 mu) will be mixed with 5000 kg of soil and 100 kg of special fertilizer for watermelon. The rice strip is applied, and the width is 0.6-0.8 m, so that the soil and fertilizer are evenly mixed.
3 total manufacturing. After soil preparation, the sorghum type is used, the height is 25 cm, the width is 60 cm, and the distance between the sides is 3 to 4 meters. The sides of the raft should be shaped like a turtle or a zigzag. 5 to 7 days before planting, watering the sides of the Shunguagou, making the bottom of the sputum to facilitate the cooling of the seedlings.
Sowing at the right time, cultivating strong seedlings
1 seedling method. Grafting seedlings in the shade net can be used to raise seedlings in early spring watermelon nursery sheds or ordinary sheds.
2 seed treatment. Soak the seeds in 10% trisodium phosphate solution for 10-15 minutes, then rinse off with water, then soak them in clear water for 3-4 hours, and place them on a 30% germination bed. When the bud is about 0.5 cm long, it can be planted. The live broadcaster can make 1 capsule per stalk and cover the soil 1.5 cm. The grafter should be planted in the seedbed or seedling tray.
3 grafting seedlings. The rootstock adopts a gourd and the grafting adopts the top insertion method. Rootstock seeds should be sown 5 to 7 days in advance.
4 Management after grafting. After grafting, the early stage should be based on cooling, sunshading and moisturizing. After 4 to 7 days of grafting, gradually ventilate and see light. After 7 days, gradually increase ventilation and reduce sunshade. At the same time, attention should be paid to watering, cooling and moisturizing at noon, and pests and diseases should be prevented in time.
Colonization
In late August, the watermelon seedlings are 30 to 35 days old. When the plants are born with four leaves and one heart, they can be planted. The sheds are shed 5 to 7 days before planting. When planting, the ridges are opened with two deep 10~12 cm grooves. Watering, planting seedlings at a distance of 56 cm × 65 cm, applying bactericide such as carbendazim, then covering the soil, covering the silver-gray mulch, planting 600-700 plants per 1/15 hectare.
Scientific management
1 temperature management. After planting, it should be properly shaded in the early stage of growth, and then gradually remove the sunshade, maintaining 28 to 32 °C during the day and 15 °C at night.
2 fertilizer management. Control fertilizer and water in the early stage, pay attention to drainage after rain, generally do not topdress. As a result, the fertilizer and water are tight, and the fertilizer is chased once every 5 to 7 days after sitting on the melon. Each 1/15 hectare of chasing watermelon special fertilizer is 25-40 kg and urea is 10-15 kg. It is also possible to spray the nutrient solution on the foliar surface and spray once every 10 days.
3 using the three vines close to the pruning method.
4 assisted pollination. The main vines are 2nd and 3rd male flowers. The artificial pollination is carried out from 7 to 9 am on the morning of the opening. It can also be applied to the squid.
5 pest control. The main pests and diseases are aphids, red spiders, viral diseases, blight, blight and anthrax. The aphids can be covered with silver-gray mulch, and the chemical control can be sprayed with a 2000 times solution of nicotine mixture. Red spiders are mainly sprayed with liquid medicine such as phlegm and phlegm, once every 8 to 10 days, and even sprayed twice. Viral diseases should be based on prevention, and attention should be paid to reducing wound infections, and controlling aphids while using virions and other agents for prevention and treatment. Fusarium wilt is controlled by grafting. After the occurrence of anthrax, in addition to the spraying of methyl thiophanate and other fungicides, it can also be treated with chlorothalonil.
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