1, select excellent varieties.
Variety selection, mainly based on watermelon varieties cultivated for many years, choose the main watermelon varieties with the strongest adaptability to local climate, soil and fertilizer, the highest yield and the best quality.
begin sowing in good time
The key to cultivate strong seedlings is to sow in time and raise seedlings in greenhouse with plastic film. In the middle and late stage of seedling raising, it is necessary to expose more and cover less during the day and night. 3-5 days before transplanting, all-weather plastic film can be removed to raise seedlings and cultivate strong seedlings.
Step 3 Apply plantar fertilizer
Watermelon needs a lot of fertilizer. Therefore, adequate application of high-quality base fertilizer is the basis for obtaining high-quality, stable and high-yield watermelon. Fertilize decomposed fertilizer1500-2,000 kg per mu and Hefei 25-30 kg (special compound fertilizer for watermelon is better). The fertilization method can be changed from single furrow fertilization to double furrow fertilization, that is, two furrows with a depth of 20-30 cm and a width of 30-40 cm are respectively opened in the middle of the compartment, and then two furrows are opened for fertilization, and the soil is covered by about 5 cm, and melon seedlings are planted between the two furrows. The advantage of this fertilization is that it does not burn seedlings and prevents overgrowth.
4. Scientific topdressing
On the premise of applying foot manure, only 200 kilograms of human manure and 3 kilograms of urea are needed for the extension period. Because watermelon is very sensitive to water and fertilizer during flowering and fruit setting, if there is too much fertilizer and water at this time, the plant will be overnourished, which will easily lead to vain growth and hinder the stability of watermelon. Therefore, when the young fruit is as big as an egg, topdressing can be appropriate. Watermelon swells when sitting on the melon, and the root system just extends to two fertilization ditches, which is rich in nutrition and beneficial to the rapid growth of melon-shaped standard melons.
5. Disease control
Three diseases of watermelon are damping-off, Fusarium wilt and anthracnose. The seedling stage should be protected against sudden drop disease, the seedbed should be well ventilated and watering should be controlled. Prevention and control methods of Fusarium wilt and anthracnose: avoid continuous cropping, generally once every 4-5 years, do a good job of cleaning ditches and discharging pollutants, and remove diseased plants in time. Chemical control: spraying Harmandi yellow leaf dead seedlings 120 or new branch plant protection dead seedlings 120 has good control effect.