Watershed cultivation of watermelon in the transplanting planting before the melon field deep plough again, Shizu base fertilizer, per acre Shiren farmyard fertilizer 2-3 tons, 100 kg of compound fertilizer, and then plowing the soil preparation so that the fertilizer and soil leveling after processing, After the shed was covered, it was selected for transplanting on a sunny afternoon. This is beneficial to the survival of watermelon seedlings, so that the seedlings after planting grow well. The main technical measures are as follows:
(I) Transplanting in a timely manner: 20-30 days after grafting, when the seedling grows to 3 leaves and 1 heart, it is suitable for transplanting.
(b) Prevention of rooting: When transplanting, the interface part should be about 1cm above the ground and covered with a plastic film. Crawling cover straw to prevent the rooting of the scion and the plant's disease.
(c) Appropriately sparsely rooted: After rootstock grafted, the root system is strong, with strong absorptive capacity, and the plant grows more prosperous. It should be sparsely planted, and the plant spacing should be 2 meters and 1 meter, and 300 to 350 plants per mu.
(D) a reasonable pruning: three vines pruning stay single melon, we must promptly dredge less than 8 within the melon, choose to stay in the second or third normal development of melons, each plant left guatemala 1-2 workers pollination.
(E) pre-control growth: grafted seedlings grow vigorously, on the basis of the application of base fertilizer, according to the growing trend of flexible fertilizer, extending the top after the first top-dressing watering, mu recovery 30 kg compound fertilizer. After half an hour of flowering, fruit growth accelerated. When the melon grows to a diameter of about 15 cm, combined with watering, the second fertilizer is applied, and 15-20 kg of compound fertilizer is recovered.
(6) Moisture management: Soil moisture in the greenhouse is large, stems and leaves are easy to grow long. Therefore, less watering should be done in the early stage, and water should be placed in the water after the ripening stage. Water should be controlled after entering mature stage to facilitate fruit coloring and increase fruit content. The amount of sugar accelerates fruit ripening.
(seven) do a good job of artificial pollination work: cultivation of watermelon in greenhouses to artificially assisted pollination, generally at 10:00, select a large male flower, exposed stamens, gently rub on the female styling, so that the pollen falls evenly on the stigma In case of low temperatures or poor weather, the male flower was taken off the previous day, placed in a closed container, kept at 25°C at room temperature, pollinated after flowering in the morning, and marked the flowering date after pollination in order to pick the melon in time.
(8) Good prevention and control of pests and diseases: Grafting can prevent the occurrence of watermelon wilt disease, but it should not ignore the arrangement of the mouthwash and the number of years of rotation so as to prevent harm caused by continuous cropping and other diseases. Therefore, watermelon grafting still needs to adopt comprehensive agricultural disease prevention measures and do not ignore the role of pesticide control.
(9) Temperature and humidity management in the shed
1. Temperature management: Ventilation before planting after planting shall be conducted with no ventilation, and the temperature shall be maintained at 20°C-35°C during the day after easing, and shall not be lower than 10°C at night. Until the flowering period, greenhouse temperature is 20°C-28°C, ground temperature is above 15°C, nighttime is not lower than 5°C, and temperature is 30°C-35°C. To increase the rate of fruit set.
2. Light management: Watermelon is a hi-light crop. If non-drip-free membranes are used, water droplets should be removed as much as possible on the surface of the membrane every morning, or be sprayed on the dried membrane surface with a waterproof drop when in the shed. Photogenicity.
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