How to graft kiwifruit trees? Detailed steps and precautions are attached

Kiwifruit, also known as kiwifruit, the earliest text records appear in the Book of songs, is a fruit tree with a long history of planting. Artificial planting of kiwifruit in China has a history of more than a thousand years and rich experience, so there is rich theoretical and practical support for the grafting technology of kiwifruit trees. Do you know how to graft kiwifruit trees?

Grafting time of kiwifruit trees

The best grafting time for kiwifruit trees is from mid-May to early June, and from early May to early July. At this time, the average temperature is between 19 ℃ and 23 ℃, the temperature and moisture are just right, and the survival rate of grafting is relatively high. During this period, the buds of the seedlings germinated earlier, the growth was larger, the seedlings matured more easily and the quality was better; if the seedlings did not survive, there was more time for timely regrafting.

II. Rootstocks and scions of kiwifruit trees

Choose strong-growing seedlings as rootstocks, and if the big trees are replaced with improved varieties, the perennial branches should be retracted. 1-year-old branches with 2-3 buds truncated to remove overdense, weak perennial branches and 1-year-old branches, so as to reduce the number of branches and buds and promote their growth. Using the improved varieties adapted to the local environment as the spike mother tree, the new shoot of the scion should be a strong fruiting branch or developmental branch with short internodes, thick petiole and thick leaves. Using semi-lignified shoots as scions has high survival rate and early germination. Cut off the leaves immediately after picking the new tip of the scion, leaving the petiole not more than 0.5 cm, it is best to marry and collect now. If it is not used or transported for a short time, soak the lower part of the scion in water or wrap it with a wet cloth to moisturize.

Matters needing attention after grafting of kiwifruit trees

1. Erase the sprouts of rootstocks

About 10 days after grafting, most of the scion buds expanded and germinated, and the bud eyes of rootstocks also began to germinate. from then on, attention should be paid to the removal of rootstock sprouts until the beginning of autumn. Especially before 2 or 3 new leaves of the scion are fully grown, the sprouting of the rootstock should be wiped out at least once every 7 days. When you see the hidden buds under the film expand and turn green, use hard objects such as knife backs or sticks to squeeze the buds on the rootstock to destroy the buds, otherwise the new buds of the scions will stop growing or even die; some trees will sprout in the soil at the base of the trunk of the rootstocks, and the sprouting is not easy to be found when the tillers are small, so we should pay more attention to removing them in time.

2. Watering

Kiwifruit can not be watered within 15 days before and after grafting, but if the soil is dry or dry, it is best to water once 15 days before grafting, and when the water is slightly dry, shallow hoe cuts off soil capillaries to reduce evaporation. High temperature and drought in April and May, the air temperature, ground temperature and water temperature are stable, and the new shoots grow very fast. It is best to water once every 15 days and apply fertilizer properly.