1, time autumn grapefruit seedlings generally around the Mid-Autumn Festival, the weather began to turn cold. After grafting, it will sprout once a autumn shoot and once a winter shoot. The length of the two shoots will be about 35 centimeters. After the winter is slightly mature, it will be suitable for spring planting and will be planted in the field. 2. The climate is selected for the appropriate sunny days for grafting to ensure that no rain occurs after 3 days of grafting. If it rains, it must be covered with a thin film or other tool to cover the grafted grapefruit seedlings. If the climate is dry, suitable watering can begin after 5 days of grafting to keep the soil moist. 3, the selection of buds and grapefruit seedlings is good or bad, and scion sources have a great relationship. Some diseases cannot be observed in the nursery plots and only after a certain period of time has been established. Therefore, disease-free cassia plants should be selected as the parent tree, and no fertilizer should be applied 10 days before budding. Choosing the scion should choose erect and strong old shoots on the top of the tree. The top 5-8 of the scions of each scion are the most suitable for grafting. 4, grafting generally adopts small bud abdominal connection method. First, scion the size of uniform buds, immersed in clean water, one can not cut a lot, usually 300-500 mesh is appropriate. Then select the rootstock with a diameter of about 0.5cm, cut the upper part, keep 2-3 leaves, and start cutting at 6cm from the ground. Diagonally cut deep into the surface of the xylem. The incision length is about 1.5cm, and the grafting knife is removed in the reverse direction. Cut off the skin 0.5 centimeters from the bottom of the incision, and then take out the prepared buds to enter the incision, close contact, and then use a special film for grafting, requiring single-layer sealing and dressing at the eye buds, and the rest of the bags are tightly wrapped and the incisions are not exposed. . 5, field management grapefruit seedlings grafted in time after weeding buds, buds on rootstock should be erased once every 10-15 days, to avoid nutrients were consumed until the first grafted shoots mature, rootstock grafting interface above Partly cut off. The new shoots of grapefruit seedlings are susceptible to pests and diseases, especially leafminers, so it is important to prevent them from attacking the insecticides once a week until the new shoots become mature. When most of the shoots of the grafted grape seedlings show three leaves, the fertilizer and water must keep up to date, and it is best to use decomposed manure water, and fertilizers can also be used appropriately. If the winter temperature is too low, it will affect the length of winter shoots, and timely insulation measures should be taken. The film can be generally used to cover the arch, the entire cocoon is wrapped tightly, and the sun is opened when the sun comes out during the day. After the sun sets in the afternoon, it is sealed back to the original state to ensure the normal growth and development of the jujube seedlings. In this way, when the spring plowing next year, there will be qualified grapefruit seedlings for planting. China Agricultural Network Editor
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