High-speed top grafting method of evergreen fruit tree at low temperature in winter

Abstract

The invention discloses a new off-season high-speed top grafting method applicable to evergreen fruit trees such as an elderly orange tree and the like during a low temperature period in winter. The method comprises the following three innovative technologies: 1, cutting off stock, shearing off all stock leaves, and then grafting in winter; 2, carrying out budding grafting by a scion at a branch segment with 2-4 leaves; and 3, reserving all the sprouts on the stock during a spring shoot period after graft survival so that the sprouts grow and develop synchronously with the automatically produced branch tips of the survived scion. By means of the technical effect characteristics in the method which are completely opposite to those of the conventional similar techniques, high grafting survival rate up to over 90% can be easily obtained, a high-yield fruiting period can be quickly entered, and finally the top grafting task is completed.

Description

technical field [0001] The invention relates to a method for high-speed and high-speed grafting and replanting of evergreen fruit trees at low temperature in winter. technical background [0002] At present, in the method of high grafting and replanting of evergreen fruit trees, the following techniques are usually used: generally grafting in autumn, after the grafting survives to the germination stage of the second spring, the second time of film removal and the second time of cutting off the stock to promote budding are carried out, and a single method is used. The scion (or bud sheet) of the bud branch is grafted abdominally, and at the same time, all the buds on the rootstock are wiped out in time at the spring shoot stage, and it is considered that nutrients can be saved for intensive use in the growth and development of the surviving scion. Practice has proved that the consequences of this method are counterproductive. On the one hand, it exacerbated the imbalance betw...

AI Technical Summary

Problems solved by technology

Practice has proved that the consequences of this method are counterproductive. On the one hand, it exacerbated the imbalance between the root and the crown, and the tree vigor dropped sharply, causing a large number of roots to die; On the other hand, the shoots of the surviving scions are all strong branches, which delay the fruiting period, and the fruits produced are all rough-skinned and large fruits with no commercial value.