Pear tree improvement method

For pear trees with poor quality and low yield, the original plants are usually removed. The method of planting good seedlings and cultivating seedlings must be put into production five years later. If high-replacement planting technology is used, the existing tree skeleton can be used to quickly form a canopy, reaching a production capacity of about 60 kg per year for the next year, and about 170 kg for the third year, and it can also increase production year after year. Now introduce its high-connection technology points are as follows for reference. 1. Grafting time young and young low-yield low-quality trees can be used for high-yielding varieties; aging, disease and insect pests, low-yielding, low-quality trees should not be replaced by high-risk trees, and should be cleared for planting. High grafting and replacement can be carried out in the spring and autumn seasons. Among them, grafting is better during March-April and August-September. This is because the sprouts of the scions are abundant and the sap flow is vigorous; the meristem is active and the healing tissue is formed quickly. The survival rate is high and the scion grows fast. Suitable temperature for grafting is 20-26 °C, so grafting should be carried out in the morning, evening and cloudy days. 2. Scion collection To select the plants suitable for local climate and site conditions, robust growth, no pests and diseases, and fruitful results, the quality of the plant will be used as the cutting mother tree. 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. 3. 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 crown. 4. Grafting operations There are many methods for high-risk pears, of which the spring is mostly subcutaneous and the fall is mostly budding. Under the skin, Zhu cut a long bevel about 8 centimeters long at the lower end of the scion, and cut two short bevels about 0.6 centimeters long at the back end (to make it arrow-shaped), leaving 3-5 buds at the top to cut off; The anvil cuts and flattens its cross-section, and cuts on its smooth side - an incision equal to the length of the cutting face of the scion, deep to form the layer; picks the cork of the anvil head, inserts the scion into the cutting face, inserts the anvil between the xylem and the phloem Finally, the interface was tied with a plastic film tape. The budding operation can use conventional "T" shaped connection method, and the bud length is preferably 2-3 cm. 5. Immediately after the management, the anvil body buds-buds should be erased in order to promote the growth of the grafts. After the interface has healed firmly, the bandage should be released so as not to affect the growth of the graft. For budding shooters, after cutting, the anvil tip should be cut from 0.5 to 1.0 cm. 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. China Agricultural Network Editor

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