The Grafting Method with the Highest Survival Rate
In the field of plant propagation, grafting technology is an important means to continue excellent traits. Bud grafting and branch grafting, as the two grafting methods with the highest survival rate, can improve plant affinity by more than 40% when used properly. Scientific data shows that under standardized operations, the average survival rate of these two methods can reach 85%-95%, making them the preferred propagation solution for horticulturists.
Detailed Explanation of Bud Grafting Technology
Best Time for Bud Grafting
Choose the period from midsummer to early autumn when the activity value of the cambium cells of the rootstock reaches 0.8-1.2μmol/g·h. At this time, the woodiness of the bud is moderate, which can avoid the frost damage caused by early grafting in autumn and prevent the difficulty of bark separation caused by late grafting.
Standard for Bud Selection
When using T-shaped shield-shaped bud pieces, the length of the bud body should be controlled between 2.5-3cm, and the thickness maintained at 0.3-0.5mm. Preferably select plump buds from the middle part of branches with a diameter of 6-8mm, and the integrity rate of bud eyes needs to be ≥95%.
Classification of Bud Grafting Operations
In addition to the traditional shield-shaped bud grafting, annular bud grafting is especially suitable for Rosaceae plants with thick bark. Experiments show that using the double-loop cutting method can increase the survival rate of rose grafting to 92.3%.
Complete Guide to Branch Grafting Operations
Control of Branch Grafting Time
The best period is the initial flow of tree sap in spring (when the average daily temperature is stable above 10℃). At this time, the pH value of the exudate from the cut surface of the rootstock is between 6.2-6.8, which is most conducive to the formation of callus.
Key Points for Scion Treatment
Select one-year-old semi-woody branches, retaining 3-4 complete buds. The suggested angle for the oblique cut surface is 30°-45°, and the smoothness of the cut directly affects the efficiency of nutrient transport.
Comparison of Branch Grafting Methods
Split grafting is suitable for rootstocks 5-10cm thick, while cut grafting is often used for thin rootstocks 2-5cm in diameter. The approach grafting method is suitable for precious varieties, and the survival rate can be increased by 15% through double incision alignment.
Scientific Management After Grafting
When using elastic bands, it is necessary to maintain a tightness of 70%-80%, as excessive tightness will inhibit the expansion of callus. After 2-3 weeks of shading treatment, gradually increase the light intensity, and controlling humidity at 75%-85% can accelerate the healing of the graft joint.
By accurately controlling the grafting time, standardizing the operation process, and accompanying scientific care, the survival rate of fruit tree grafting can be stabilized at over 90%. It is recommended to establish a standardized operation manual based on the characteristics of the plant varieties, regularly monitor the development of callus at the graft joint, and convert traditional experience into quantifiable technical parameters.