Method for grafting and breeding improved varieties of jujube at root collar of wild jujube

Abstract

The invention discloses a method for grafting and breeding improved improved varieties of jujube at root collar of wild jujube, comprising the steps of a, collecting cutting woods: after jujube tree falls leaves and before the jujube tree germinates, collecting 1-year-old cutting woods of the improved varieties of jujube; b, cutting scion: cutting the cutting woods of improved varieties of jujube according to one bud, straightly cutting at place with distance of 1.5cm above the bud, and straightly cutting at place with distance of 5-6cm below the bud; c, preserving short cutting woods after cutting: sealing wax for the cut cutting woods, putting the treated cutting woods in bags according to variety, sealing and preserving in dark and shade place; d, cutting stock: cutting 2-3cm of all overgroundparts before the wild jujube seedling germinates and expands leaves, and digging up roots of the wild jujube as stock; e, grafting: using the cleft graft method with the stock with thickness of less than 1cm and the cut grafting method with thickness of more than 1cm. The method adopts the method for grafting and breeding improved varieties of jujube by grafting the 1-year-old cutting woods of improved varieties of jujube at the root collar of the wild jujube. Because the root of the wild jujube stock is extensive, the resistance is strong; the transplanting survival rate is high; the survival rate reaches 85-90%; and the overwintering cold resistance is improved. Due to extensive root of the nursery stock, the absorbing capacity is strong, thereby being beneficial to improving the fruit quality and cold resistance.

Description

technical field

[0001] The invention belongs to the technical field of breeding methods for fine jujubes, in particular to a method for grafting and breeding fine jujubes at the root neck of wild jujubes. Background technique

[0002] Since ancient times, jujube propagation has been mainly based on root tiller seedling propagation, which is characterized by simple operation and stable genetic traits of improved varieties. Since the 1990s, the jujube cultivation area in Zhangye has seen a high frequency of frost damage. For example, the severe cold in 2002 caused severe frost damage to large trees for many years, and the death of small trees, which seriously affected the healthy development of the jujube industry. It is more difficult to use jujube with strong resistance as rootstock to graft improved varieties. Because there are many small thorns in jujube, the operation is difficult, and the survival rate of grafting is less than 40%, which affects the propagation and promo...