Grafting seedlings are to graft the seedlings of the cultivar onto the rootstock, and a new seedling is formed from the rootstock of the rootstock and the seedlings of the cultivar. Greenhouse cucumber grafting can not only improve the ability of plants to resist soil-borne diseases and insect pests and continuous cropping obstacles, but also improve stress resistance and yield, but the technology must be mastered before it can be successful. Scientific seedlings are selected from the next year's black seed pumpkin seedlings as rootstocks, seeded for 2 to 3 days before sowing, and then soaked with 5-10 mg / liter of gibberellic acid solution. The anchoring method was used to broadcast the rootstock after scioning, and the sowing date was 4 to 5 days. The plugging method first broadcasted the rootstock and then spliced ​​the ear. The sowing date of the two was 4 to 5 days. The shed is kept warm before emergence, and the seedlings are quickly unearthed. The general temperature is maintained at 25-28 °C during the day and 18-19 °C during the night. Cucumber seedlings are cooled immediately after they are unearthed, and the temperature of the shed is controlled at about 20 °C to avoid the temperature being too high. The seedlings are opposite, the temperature is higher, and it can be kept at around 30 °C. Pay attention to the weather when watering the seedbed. Do not water before the cloudy days, especially before the cloudy days of the low temperature season, to prevent rooting. Grafting correctly Choose the melon seedlings that grow well in the sunny day, and operate in the place where there is no wind and no direct light. By the connection method, the first true leaf of cucumber is semi-expanded, the rootstock of the rootstock is flattened or the leaf is grafted by one leaf; the plugging method is carried out 10 days after the rootstock is sowed, and 5 to 6 days after the earing is sowed, and the cotyledons are grafted when they are flat. The front scion and the rootstock should be properly watered to increase the nighttime temperature and extend the hypocotyl to 7-8 cm to avoid contact with the soil infection after the colonization. Remove the cucumber and pumpkin seedlings from the seedbed, remove the true leaves of the pumpkin seedlings, and cut the knife at 0.5 to 1 cm below the cotyledonary node. The blade is parallel to the two cotyledons, and the stem is inclined downward at 30 to 35 degrees. It is one-half to two-thirds of the stem, and the cut surface is 0.7 to 1 cm long. Then it is cut obliquely at 1.5 to 2 cm below the cucumber seedlings, with an angle of 25 to 30 degrees and a depth of three stems. In two, the length of the knife edge is the same as the length of the cut surface of the scion. The two incisions were embedded in each other, and the cucumber cotyledons were pressed against the pumpkin cotyledons and fixed with grafting clips. Immediately after grafting, the seedlings are planted on the seedbed, and the roots are shallowly buried and separated from the roots of the rootstocks so that the roots of the roots can be removed in the future, and the graft interface and the soil surface are kept at a distance of more than 3 cm to prevent contamination. The grafting interface of each seedling is oriented in the same direction, so that the roots are broken after survival. After planting, pour enough water. Grafted seedlings are managed to create a microclimate environment with high temperature, high humidity and weak light within 3 days after grafting to promote wound healing. Ventilation and shading according to the principle that “the eye is not obviously wilted and the hand feels slightly softâ€. Specifically, we must master several links. (1) Temperature. The suitable temperature for graft healing is 25-30 °C. Avoid glare at night, cover the shading, and gradually increase the light seeing time. After 7-8 days, it can no longer be blocked. (2) Humidity. After grafting, the relative humidity of the air in the seedbed is above 90%. After 2 days, the ventilation is gradually ventilated to reduce the humidity, but the humidity in the bed soil and nutrient sputum should not be too high, so as to avoid rotten roots. (3) Roots are broken. 8 to 10 days after grafting, the color of the scion turns green, the heart leaves are tender, and the roots can be broken when there is no wilting at noon. One day before the root is broken, the hypocotyl interface of the scion is first pinched with a finger, and the next day, a section is cut at 0.7 to 1 cm below the interface to prevent the fracture from re-healing. (4) Except for the side buds of the rootstock. After the rootstock is excised from the growth point, a large number of indeterminate lateral buds will be germinated, which directly affects the survival of the scion, and the adventitious buds formed on the rootstock should be removed in time. It usually starts 1 week after grafting, once every 2 to 3 days. Disclaimer: Some articles on this website are transferred from the Internet. 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