What are the common methods of watermelon grafting?

(1) docking. (1) preparation of rootstock: when the leaves of the rootstock are flattened and the true leaves are exposed, the growing points are removed, and the depth is 1/2 ~ 3/5 of the stem thickness, and the incision length is about 1 cm. (2) Preparation of the scion: The cotyledon of the scion is flat, and when the true leaf is exposed, it is inclined at the corresponding position by 45 degrees, the depth is 1/2 ~ 2/3 of the stem diameter, and the incision length is the same as that of the rootstock. (3) mutual grafting: the scion incision is embedded into the incision of the rootstock stem, so that the two incisions are closely combined, and the joint is fixed with a grafting clip. (4) Root cutting: after grafting, the rootstock and scion are planted in a nutrient bowl at the same time, and the interface is about 3 cm away from the soil surface. After 7 days, the joint healed, the root of the scion was cut off, and the binding was released in 18 days to15 days.

(2) plug. (1) rootstock preparation: the rootstock is planted in a plug or a plastic bowl. The suitable time for grafting is when the first true leaf of gourd rootstock is unfolded. When grafting, the true leaves and growing points of the rootstock are removed with a blade or bamboo stick, and then the bamboo stick with the same thickness as the hypocotyl of the scion is cut into a wedge shape, and inserted obliquely downward from the main vein of the right cotyledon of the rootstock to the other cotyledon with a depth of about 65438±0cm. It is not advisable to cut the skin, and bamboo sticks are faintly visible. ② Preparation of the scion: When the two cotyledons of the scion are unfolded, use a blade to cut a wedge-shaped surface with an inclined plane of about 65438±0cm below the cotyledon node. (3) Mutual grafting: pulling out the bamboo sticks inserted on the rootstock, and then inserting the cut scion into the holes, and the cotyledons of the scion and the rootstock are cross-shaped.

When inserting, double root cutting grafting can be carried out, that is, the rootstock can be cut horizontally from 5 cm below the cotyledon, and other operations are the same as above. After connection, insert it into the matrix of plug or plastic bowl. Its advantages are: removing the main root, weakening the top advantage of the root system and enhancing the vitality of the fibrous root. After planting, the emergence delay is fast, and the low temperature tolerance of seedlings is obviously stronger than that of the previous growth potential. Rooted grafted seedlings have developed roots, and their fertilizer absorption capacity and drought resistance are obviously stronger than those of traditional grafted seedlings. Anti-premature aging in the later stage, not prone to acute physiological wilting, and the single fruit is significant.

(3) splicing. (1) rootstock preparation: The proper time for grafting is when the rootstock grows true leaves. First, remove the true leaves and growth points, and then split one side of the young stem downward from the middle of the two cotyledons, with the length of 1.0 cm ~ 1.5 cm. (2) Preparation of scion: When the cotyledons of the scion are unfolded and suitable for grafting, the hypocotyl of the scion is cut into a wedge shape with the section length of 1.0 cm ~ 1.5 cm. (3) Mutual grafting: the cut scion is inserted into the split position, so that the surfaces of the rootstock and the scion are smooth and fixed by a grafting clamp.