Walnut spring bud grafting method

Abstract

The invention discloses a walnut spring bud grafting method and belongs to the technical field of walnut grafting. The method includes the steps of S1, selecting grafting stock, to be more specific, selecting an annual or biennial 'Jizhuamian' walnut/early-fruiting walnut seedling as the grafting stock, wherein the walnut seedling is good in growth vigor and free of diseases and pests, and the ground diameter of the walnut seedling is larger than or equal to 1.0cm; S2, selecting a scion, wherein the scion is selected from Xiangling, Liaohe No. 1, Qingxiang, Yuanlin or Lvxiang walnut, and the scion can be the scion preserved in a cold storage or the annual vegetative shoot germinated in the spring germination period; S3, performing grafting after the leaves of the spring walnut stock seedling spread and when the xylem and the phloem of the stock separates. The method has the advantages that the grafting is performed in spring which is appropriate in weather, the method is convenient inoperation and high in efficiency, the grafting time becomes earlier as compared with a traditional summer bud grafting method, the seedling growth and development period is long, and rich branches andhigh emergence rate are achieved.

Description

technical field [0001] The present invention relates to the technical field of walnut grafting, in particular to a kind of walnut spring bud grafting technique. Background technique [0002] In the prior art, the application number 201711183880.0 discloses a method for grafting walnuts on 2019-05-31, which is characterized in that it comprises the following steps: (1) preparing the scion; (2) selecting the rootstock; (3) pre-treatment of the scion; 4) Grafting; (5) Bandaging after grafting and untying of new branches; (6) Transplanting to promote the high yield of walnut fruit. The survival rate after transplanting is more than 60%, the survival rate after transplanting is more than 95%, the yield is high, the fruit of a single branch is in the shape of spikes or clusters, the peach trees are vigorous, the branching rate is strong, and the bore branches bear fruit. [0003] Application No. 201810808675.7 in the prior art discloses a method for grafting walnut seedlings on...

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Problems solved by technology

[0004] There are still certain defects in the above-mentioned grafting scheme. For example, walnut branch grafting is carried out in the middle and late April of spring, such as skin grafting, double tongue grafting, etc. The climate is suitable for grafting during this time period, and the gradual increase in temperature is conducive to grafting and healing. The growth of grafted seedlings, and the long time of grafting after branch grafting is conducive to the formation of high-quality seedlings, but the operation of branch grafting is relatively complicated, the labor cost is high, the survival rate of grafting is relatively low, and the scion waste is serious. In summer, it is carried out in the middle and late June, such as large square bud grafting. Its advantages are that bud grafting is easy to operate and has high work efficiency, but grafting can only be carried out when the buds are mature. Grafting time is in summer, and the temperature is high, which seriously affects the work efficiency of grafting workers. At the same time, summer is the rainy season, and weather such as rainfall is not conducive to the formation of grafted callus and the healing of grafted bodies, which seriously affects the survival rate of seedling grafting and the quality of seedlings; at the same time, compared with spring branching, walnut summer budding takes less time for grafting , the growth of the branches in the year is relatively small, and the degree of lignification of the seedlings is low, so that the seedlings in the bed are prone to winter freezing damage, and the quality of the finished seedlings is low.

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