Cucumber grafting is an important way to protect against disease and increase production under protection and cultivation conditions. In order to increase the survival rate, the following points should be noted when grafting cucumbers.
The seedling age should be suitable. Rootstock black seed squash generally 7-8 days after sowing, cotyledon flat, real leaves just outcrop, stem height 7-8 cm for the best grafting period; cucumber generally sowing 10-14 days, cotyledons fully grown, the first piece of real The leaves have not yet developed and the grafting is appropriate when the stem height is 7-8 cm.
Grafting should be standard. The first is to grasp the grafting of pumpkin seedlings and cucumber seedlings when their stem diameters and stem heights are similar; the second is that the incision angles are basically the same; the third is that the incisions should be smooth and the incisions should be relatively consistent with the cortex; and the fourth is that the cucumber leaves are placed on the top of the pumpkin leaf. Glyph.
Warm light to control. Keep 28°C-30°C during the first 3 days after grafting and 17°C-20°C during the night. After three days, the temperature gradually decreased, and it was controlled at 22°C-25°C during the day and 16°C-18°C at night. Shade 3-4 days after planting.
Watering should be appropriate. After the planting, one-time permeable water shall be poured to prevent flooding, and special attention shall be paid to avoid immersing in the interface when watering, so as to prevent bacteria and dirt from immersing into affecting the survival rate. In the first 3 days, the air humidity in the small arch sheds was kept above 95%. After 3 days, the small arch sheds gradually released air and dampness. The air humidity should be kept between 70% and 80%, so as to prevent the excessive humidity from causing root collapse.
Wiping roots should be timely. Grafting grafted cucumber seedlings can still sprout new lateral buds. Therefore, after grafting, we should always carefully observe and eradicate germinating lateral buds in time to avoid competition for nutrients. Grafting wounds basically healed 10-11 days after grafting and they can be cut off. Before cutting the roots, squeeze the base of the cucumber stem with a forceps or finger to destroy the vascular bundles and restrict the self-root water supply of the cucumber scion, so that it can be adapted as soon as possible after cutting off the roots. When the roots are cut off, all the scion cucumber roots can be cut off. After the cucumber seedlings grow fully into normal, the grafting clips can be removed. Promote flower bud differentiation. When the first true leaf is unfolded, the flower buds differentiate into the ninth section; when the second true leaf is unfolded, the flower buds differentiate into the fourteenth section; when the sixth piece is true When the leaves are unfolded, the flower buds differentiate into the twenty-third quarter, so that management after grafting is crucial. Spraying foliar fertilizer on cucumber seedlings when they grow to 1-3 leaves can effectively promote the differentiation of female flowers. It can also effectively balance plant vegetative growth and reproductive growth, and prevent the formation of small old seedlings.
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