High-temperature top grafting and variety changing method for pomelo trees

Abstract

The invention discloses a high-temperature top grafting and variety changing method for pomelo trees. The method comprises the following steps of picking down and storing scions, pruning rootstock, grafting the scions to the rootstock, and finally performing post-grafting treatment. Pruning treatment on the rootstock specifically comprises the following steps of after a parent fruit tree is selected, pruning branches of the parent fruit tree, and reserving 3-5 main branches or side branches which extend outwards and are not staggered with each other as the rootstock and 3-5 thin and weak branches with the diameter of 0.2-0.5 cm as auxiliary branches and water eliminating branches. According to the high-temperature top grafting and variety changing method for the pomelo trees, the rootstockis pruned selectively, the thin and weak branches are reserved, so that root systems absorb nutrients and moisture from soil, meanwhile, the moisture conveyed to grafting openings and the moisture needed by scion growth are balanced, scion germination is facilitated, and the survival rate of high-temperature top grafting and variety changing of the pomelo trees is effectively increased.

Description

technical field [0001] The invention belongs to the technical field of agricultural planting, and in particular relates to a method for high-temperature and high-temperature grafting and replanting of pomelo trees. Background technique [0002] Pomelo tree is a subtropical evergreen fruit tree. The pomelo pulp is rich in vitamin C, and has the effect of digestion and detoxification, which is very popular among people. However, in the production process, it is often encountered that the fruit quality of some pomelo varieties is low, and the economic value is low, or in the process of pomelo variety exchange, it is necessary to preserve and observe good pomelo varieties to make them bear fruit as soon as possible. Usually, under these circumstances, pomelo trees need to be replanted by high grafting, that is, the scion of a good variety of pomelo tree is grafted onto the rootstock of the original pomelo tree for improvement. shortcut. [0003] High grafting and replanting of...

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Problems solved by technology

[0003] High grafting and replanting of pomelo trees are generally carried out in spring or autumn by abdominal grafting or cutting grafting. The temperature for high grafting and replanting is generally 20-25°C. However, due to the relatively high temperature in southern regions, the outdoor temperature usually reaches 30°C. Above ℃, the water evaporates quickly. In such a high-temperature environment, no matter whether it is high-grain grafting by cutting or abdominal grafting, it is not easy to survive, and the effect is not ideal.

In the traditional grafting method, all the branches on the parent fruit tree are usually pruned, and only some thick branches are reserved as rootstocks, so that the water absorbed from the soil can only be obtained from the grafting without leaves evaporating water. The interface is discharged, and the grafting interface is generally wrapped with plastic film, and the moisture will be wrapped in the position of the grafting interface. After a long time, the grafting interface is easy to rot and the survival rate is low.

Secondly, all the nutrients are transported to the grafting interface along with the water, causing the buds at the lower part of the rootstock to germinate easily, trapping the nutrients in the buds, and only a small part of the nutrients can be transported to the scion, making it difficult for the scion to survive

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