Fruit tree grafting: How should we increase the survival rate?

Affinity affinity refers to the ability of rootstocks and scions to heal and survive and grow normally after grafting. The rootstock and scion are not compatible or have low affinity. The main performance is as follows: poor wound healing, poor healing after healing or poor healing, and low survival rate; some can heal, but the graft does not germinate, the healing is poor, and the growth is late. Easy to break. The growth results were not normal. After grafting, the leaves were yellow, the leaves were small and clustered, the growth potential was weak, and even died. In some cases, a large number of flower buds were formed in the early stage, and the fruit development was abnormal. The phenomenon of "big and small feet", the growth of the rootstock and the scion interface is not coordinated, some "big feet", some "small feet", and some are "rings". In the later stage, it was not friendly, and it grew well in the early stage, but it was seriously incompatible in the later stage.

The rootstock quality of the rootstock and the scion are enriched, and when the nutrient is stored, it is easy to survive after grafting. Therefore, you should choose to organize the branches that are full and strong and full of buds. The semi-lignification and scion lignification survival rate of grafted rootstocks were the highest; the semi-lignification of rootstocks and the hemi-wooding survival rate of scion were also high; the lignification rate of rootstock lignification and scion lignification was lower; if rootstock lignification, scion lignification The survival rate is lower. In the spring grafting, it is advisable to select the rootstock for lignification and the wood of the scion for grafting.

When the temperature is generally around 15 °C, the callus grows slowly; at 15 °C ~ 20 °C, the callus growth is accelerated; at 20 °C ~ 30 °C, the callus grows faster. In the spring bud, try to graft the scion to the sunny side of the seedling to increase the temperature at the interface. When the spring branches, the large facets should also face the sun to increase the temperature at the interface.

Maintain a certain humidity at the humidity interface (relative humidity above 95%, but not water), which is conducive to callus production. Therefore, the interface must be in a humid environment. After grafting, the interface must be sealed and not breathable to prevent evaporation of water. Inspection standard: On the second day after grafting, if there is no water droplets in the bound film, the binding is not strict and needs to be re-grafted.

After light grafting, the callus grows faster under darker conditions. Therefore, when grafting, try to connect the scion to the shade of the seedling.

The operation technology requires skilled grafting technology in the grafting operation. Under the correct grafting technology operating conditions, the faster the grafting speed, the higher the survival rate. Regardless of the rootstock or the scion, the cut and the noodles must be smooth, the joints should be tight, and the layers formed should be aligned.

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