Groat grafting watermelon cultivation technology in spring
It is a new technique of watermelon cultivation that the watermelon is grafted and cultivated in a large arch shed in early spring. Grafted watermelon seedlings resistant to disease The ability to resist coldness can increase the early maturity, high quality, high efficiency and high yield of watermelon fruit in early spring. Grafting techniques The main points are: First, the selection of species with early maturing, high-quality, high-yield, disease-resistant watermelon varieties for scion, such as the Golden Dragon. Rootstocks should use a vegetable hyacinth with strong affinity, high vitality, well-developed root system, good quality, and strong anti-grasping ability. Second, timely sowing nursery seedlings can usually be seeded seedlings at the beginning of mid-February. The method is to use plastic nutrition For human nutrition soil, seeds of rootstock soaked in warm water for about 10 hours are placed in a temperature range of 25°C to 28°C. In the germination, after budding, select healthy seeds sown in the nutrition. About 2 days later, it will be soaked in warm water in advance The species of watermelon that promotes buds are sown at the same time in the nutrient bowl, and the nutrient bowl is then placed in the seedbed, covering the plastic sheet. Film insulation. The seedbed temperature is maintained at 25°C to 28°C during the day, not lower than 20°C during the night, and the ground temperature should be above 18°C. Third, timely grafting when the first true root leaf seedlings unfold, scion (watermelon seedlings) cotyledons when the expansion is grafted Suitable period. Grafting method is to first remove the heart of the rootstock seedlings, from about 1 cm below the cotyledons with a blade from top to bottom was 30 Angle knife, cutting depth is not more than 2/3 of the stem, and then in the lower part of the watermelon cotyledon, a 30 degree angle from bottom to top Under the knife, cut no more than 2/3 of the stem. At this time, the rootstock seedlings and scion seedlings will be placed on a cutting incision and immediately clipped with a grafting clip. Put back into the seedbed. Watering in a timely manner after grafting keeps the seedbed soil moist. At the same time, the first three days of the grafting period should be appropriate Shade the shade so as not to expose the seedlings to strong sunlight and cause wilting of the seedlings, especially causing the scion to lose water and dry up. Seed temperature Degrees are maintained at 25°C to 28°C during the day and not less than 20°C at night to facilitate healing of the interface. Watermelon seedlings can be cut after about one week root. When grafted seedlings grow to the third true leaf, they can be transplanted and colonized. 4. Soil preparation and planting in a large arch shed about 12 meters wide, uniformly digging 1 meter deep and 3 grooves 0.5 meter deep, 3 meters apart . When digging trenches, first dig 30 cm deep mature soil in the trench to set aside, and then dig out 20 cm raw soil below. Bring ridging, and then fill 30 cm mature soil back into the ditch, and in the ditch, per acre to compost the chicken manure 10 board car or cake fertilizer 100 public 60 kg of NPK fertilizer, 50 kg of superphosphate, 100 kg of potassium sulfate, and 50 kg of potassium sulfate. plant. It is generally transplanted at the end of February to the beginning of March. The spacing of transplanted plants is 0.5 meters for small rows and 3.5 meters for the middle two large plants. 0.5 meters away. After the planting, cover the mulch and put on a small arch shed. At night, cover the grass in the large shed to keep warm. Pay attention to when planting Sunny days should be chosen and ended before 2 pm. Planting water is best used with warm water from 25°C to 30°C. V. Management after planting 1. Temperature management: After the planting period, the seedling period and the temperature during the fruit expansion period can be appropriately higher. It is generally maintained at 28°C to 30°C. The ground temperature and air temperature are not lower than 15°C, but the air temperature cannot exceed 35°C. Otherwise, it should be Ventilate when cooling. Later, as the outside temperature rises, small arch shelters can be removed in due course. 2. Humidity management: In general, Less watering in the early stage and keeping the shed relatively dry. After sitting on the melon watering to promote melon. If excessive water shortage affects the expansion of young larvae . About 15 days after sitting in the melon, water once; after “definingâ€, control the water to maturity to improve the sweetness of the watermelon and color. 3. Pruning and artificial pollination: pruning method of grafted watermelon generally uses three vine pruning, leaving 2 to 3 flowers and fruit set . Since watermelon is a monoecious and same-plant crop, insects mainly pollinate. In the greenhouse, there are rare insects such as bees. After pollination it is difficult to sit melon. Therefore, artificial pollination should be conducted timely. Pollination should be used when selecting male fertilisers. 4. Disease Pest control: The major diseases of watermelon cultivated in large arch shelters are blight, anthracnose, and blight. If it should happen Timely medication control. Such as wilt can be used 50% carbendazim WP 500 times solution root; anthrax can be used 5% chlorotoluene Powder dust control; 70% mancozeb can be sprayed with 600 times liquid WP WP. Its pests are mainly white Whiteflies, aphids, leafminers, etc., can be used 25% of fluocazin 2000 times, 25% of ikas 1000 times, and 10% Beta-cypermethrin 2000 times control. In addition, to timely harvest, the first crop ripening about mid-April, to timely harvest and listing. After harvesting melons To cut the vines, wait until after the new vines have been left and leave the three vines and the vines. By the end of June, the second pods will be harvested. taicang hexiang packaging material co.,ltd , https://www.medpackhexiang.com
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