Technical points: Seedless watermelon grafting technology is the use of the same family of gourd, gardenia, pumpkin, wax gourd and other plants with the characteristics of soil infection resistance as rootstock, seedless watermelon seedlings or branches as scion, grafting seedlings, survival after migration A method of cultivation planted in the field. The main grafting methods for seedless watermelons are splicing, docking, and docking: 1, splicing is also known as cutting. The specific operation is to remove the growing point of the rootstock first, and then use a single blade to split downwards from the middle side of the cotyledon to a depth of about 2/3 of the embryonic axis and a length of about 1.5cm. Then the cuttings are cut on both sides of the hypocotyl of the cotyledon of the scion. About 1.5cm, insert the rootstock incision, so that the scion and the rootstock combined formation, and then use cotton thread around the wound 4 to 5, thread head placed on the rootstock leaf, in order to survive the pliers solution line, can also be used grafted plastic clip. The survival rate of this method is relatively high. Generally, one skilled worker can receive about 60 strains per h. 2, the plug is also called top connection. When the first true leaf of the rootstock was exposed, the growing point was cut off, and then a special bamboo stick was used. From the top of the cotyledon, a small hole was inserted obliquely from the top to the bottom, and the depth was about 1.5cm. Then the cotyledon that had not yet been unfolded was prepared. The hypocotyls are cut into double-section wedges and immediately inserted into the anvil cavity to make them tightly connected. This method is not dressing, simple operation, high work efficiency, a skilled worker can receive 100 or so per h. 3, also called the tongue by then. Remove the growing point of the rootstock first, and place it on the hypocotyl of the rootstock near the 0.5-1cm of the cotyledon, cut it down with a blade at a 45 degree angle, 1/2-2/3 in depth, about 1cm in length, and then correspond to the scion Make a 45-degree incline in the upper part. The depth and length are the same as those of the stock. Then, the incision of the scion seedling is gently inserted into the incision of the rootstock seedlings, and then the cotton thread or a special plastic clamp is used to tighten or clamp. After the interface is healed, the scion is cut off. Roots. The survival rate of this method is high, but it is difficult to operate, the ergonomics is not high, and less is used in production. The main technical and economic indicators: the use of grafted and sparsely cultivated seedless watermelon can prevent the occurrence of wilt disease and solve the problem that watermelon can not be used as a double cropping; at the same time, due to the strong rootstock absorption ability, the fertilizer consumption can be saved by 20%-40%; Choosing gourd and pumpkin as rootstock can effectively increase the cold-resistance capacity of watermelon, which is beneficial to the cultivation of watermelon in early spring, early cultivation and early market; in addition, grafting and sparse planting can also accelerate the growth of watermelon and greatly increase the yield of watermelon. . Compared with self-rooted seedlings, it can generally increase production by about 60%.
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