Pear tree high pick change
Grafting time young and old low-yielding low-quality trees can be used for high-yielding species; aging and severely diseased and low-yielding inferior trees should not be used for high-yielding varieties. High grafting and replacement can be carried out in the spring and autumn seasons, in which grafting is better from March to April and from August to September; because the sprouts of the scion buds are abundant and the sap flow is vigorous; the suitable temperature for grafting is 20°C～26. °C, so it is advisable to graft on sunny, morning, evening and cloudy days.
The scion collection should select the plants suitable for the local climate and site conditions, robust growth, no pests and diseases, and fruitful and good quality. Request grafting with the scion immediately. Cut off the annual branches or branches of buds growing in the middle of the outside of the mother tree's canopy to make positive scions. The scion taken should be removed leaves retain petioles, tied into a small handle, the base package moistened with wet toilet paper, transport and grafting should be anti-wind sun.
The selection of the anvil branch requires the proper use of the original skeleton and the main branches. The selected anvil branch should have a long main branch, and the side branch should be short. Generally, the anvil head is cut at about 5 cm in diameter. . Young trees can be selected from 15 to 30 anvil branches, young trees can be selected from 30 to 60 anvil branches, and mature trees can be selected from 60 to 80 anvil branches. The cross section of the anvil should not be too large to facilitate the healing of the incision and the early formation of the canopy.
Grafting operations are often used in autumn. Under the skin, cut a long bevel about 8 cm long at the lower end of the scion, and cut two short bevels about 0.6 cm long (to make it arrow-shaped) at the back end and leave 3-5 buds at the top to cut off; The anvil cuts and flattens its cross-section, cuts an incision equal to the length of the cutting face on the smooth side, and deepens to the formation layer; picks the incision of the cork of the anvil head and inserts the long cutting face of the scion in between the xylem and phloem of the anvil; Finally, use a plastic film tape to bind the interface. The budding operation can use conventional "T" shaped connection method, and the bud length is preferably 2 to 3 cm.
After the management, the anvil body should be promptly erased to promote the growth of the graft. After the interface has healed firmly, the bandage should be released to avoid affecting the growth of the graft. For budding recipients, the tip should be cut from 0.5 to 1.0 cm after germination. When the scion grows to 50 centimeters, it should be picked up and tied with a small stick to avoid wind folding. It is necessary to strengthen the work of weeding, weeding, tree management, pest control, fertilization and irrigation to promote the formation of high-yield canopies, thereby achieving early and high yields.
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