To improve the survival rate of cucumber grafted seedlings, pay attention to the following points:
1. Moisturizing: When grafting cucumber, the grafting environment should be relatively moist. For each graft, a small sprayer should be used to align the scion leaves once and then quickly placed in the prepared small arch shed. After a shed is filled, the seedbed is filled with water to prevent the scion from losing water and wilting. Before the scion is alive, the shed film must be fastened to keep the seedbed in a high-humidity state (subject to the dew on the shed film).
2. Temperature control: The grafted seedlings are placed in the small arch shed for three days. The temperature in the arch shed should be controlled at 25--30oC during the day and 18--20oC at night. When the temperature is too high at noon and the light is too strong, it must be shaded with a shade net or straw curtain, or sprayed with cold water to cool down; in 4-7 days, the daytime temperature can be lowered by 2--3oC, and the light is appropriately increased; after 7 days When it is found that the scion has grown significantly, it gradually starts to ventilate and dehumidify, and further cools down and brightens until the arch film is completely removed.
3, shading: before grafting seedlings to survive, you must pay attention to shading, especially at noon with strong light, it can not be negligent. After the grafted seedlings survive, the coverings should be gradually removed to prevent the grafted seedlings from growing poorly under long-term cover.
4, in addition to Meng: cucumber grafted seedlings are easy to sprout, affecting the normal development and growth of the scion. Therefore, after the seedbed begins to ventilate, the sprouting on the rootstock should be removed in time to accelerate the development and growth of the scion.
5. Clear root: The interface of cucumber grafted seedlings is lower, and the scion easily sprouts a large number of adventitious roots from the interface. After these adventitious roots are plunged into the soil, the cucumber seedlings lose the grafting effect. Therefore, in the eradication of sprouting, the adventitious roots of the germination of the scion should be removed by the way to ensure the disease resistance and resistance of the grafted seedlings.
6, thin tube: the grafted seedlings should be carefully managed to eliminate dead seedlings early. Before transplanting, the large and small seedlings will be placed in a grading and sorting management, and the seedlings will survive and grow vigorously.
7, fine planting: cucumber grafted seedlings transplanted from the seedbed to the field should pay attention to, first, the size of the classification, the second is ridge cultivation, the third is appropriate shallow planting (interface and above can not contact the soil), the fourth is to fill the roots Water to prevent the death of grafted seedlings due to improper planting.
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