Branching usually occurs during the dormant period of trees, mostly in spring and winter, and spring is the most suitable. In the northern region, it is generally best from about the middle of March to the beginning of April. At this point, the anvil and ear sap begin to flow. The cell division is active and the interface is healing quickly. It is easy to survive. The shortest time to survive and management is convenient. However, for seedlings with more tannins, such as persimmons, walnuts, etc., the branching period should be slightly later, and it should be selected when the tannin content is low, generally after April. The same seedlings are planted in different regions. Due to the differences in climatic conditions in different regions, the time for their development varies, and they should all be selected during the most favorable period for the formation of healing tissue. Such as Henan Fuling in late September (equinox) grafted Magnolia; Shandong Heze received Peony in late September. The branching period of coniferous evergreen seedlings is suitable for summer, such as Longbai, Cuibai, Baibai, Wanfeng, etc. The rate of grafting survival in June is the highest in Beijing. After the winter branches are defoliated by trees, they can be carried out before sprouting in the spring. However, during this period, the temperature is too low and corresponding measures must be taken to prevent failure. Generally, the rootstock is dug down and carried out indoors. After being picked up, it is planted in a greenhouse or a cellar to promote healing. In the spring, it is planted in a nursery. In the process of planting or planting, because the anvil and ear do not heal solidly and do not touch the interface, the interface is prevented from being misaligned and the survival is affected. Subsequent use of wax seal scion, can be subject to seasonal restrictions, can be carried out throughout the year, the method is simple, high survival rate, production is worth promoting. Budding period: budding can be carried out during the entire growing season of trees, but the most suitable grafting period should be selected based on the differences in the biological characteristics of each nursery stock. In addition to the highest survival rate of buds from the middle of June to the beginning of July in addition to the Longyao, Jiangnan, etc., most of the seedlings in the northern region are most suitable for autumn budding. That is, from early August to early September, grafting at this time is not only beneficial to the operation, but also conducive to healing, and the sprouting bud will not germinate in the current year, free from freezing injury, and will be safe and safe for winter. Such as cherries, plums, apricots, plum blossoms, prunus triloba, etc. should be connected early, especially in dry years should be grafted earlier, generally in late July to early August, because it stopped growing earlier, later in time, anvil, The ear is not separated from the skin and it is inconvenient to operate. Apples, pears, dates, etc., can be performed in late August. However, it is better to carry out budding of poplar and Chinese rose in mid-September in the first half of the year. If the buds are budded early, the buds are easy to germinate, and they cannot be sufficiently lignified before they stop growing. It is difficult to safely survive the winter.
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Reasonable choice of grafting period