How to graft ginkgo biloba? Key points of Green Branch grafting of Ginkgo biloba

There are many ways to raise ginkgo biloba seedlings, but these sowing methods are not only expensive, but also lead to long juvenile period of trees, delayed fruit, and low survival rate of seedlings bred by cuttings. the use of hard branch grafting in spring can increase the survival rate by 80%, while the use of green branch grafting technology can increase the survival rate to 95%, so today the editor will talk about the main points of green branch grafting technology. I hope it can be helpful to everyone.

1. Grafting time

The best grafting time of Ginkgo biloba is from May to August, it should be noted that the high temperature and dry weather can not be grafted, do not grafting in sunny noon and rainy days.

Second, collect scions

Collect the sunny and well-developed annual branches from the middle and upper part of the improved mother tree, cut off every leaf on the scion and leave the petiole.

After cutting the scion every 2-3 buds, soak the lower end of the scion in water or wrap it in a warm cloth, preferably for immediate use, and store the scion that can not be used up that day in the refrigerator or cold storage.

III. Rootstock selection

The seedlings of Ginkgo biloba which are more than 2 years old with strong growth, straight trunk and strong resistance were selected as rootstocks.

4. Grafting site

For street trees, it is grafted at the dry height of the rootstock at 2.5m.

For courtyard planting, grafting at a dry height of 1.5-2m

For early-maturing and dense planting high-yield forest, it was grafted at a dry height of 0.6-1m.

5. Grafting method

Ginkgo biloba green branch grafting mainly includes split grafting and cutting grafting.

1. Splitting method

Cut at the height required by the rootstock and cut 2-2.5cm vertically in the middle of the section, then cut smooth slopes on both sides of the buds at the lowest end of the scion, which is about 2.5cm long, so that the lower end of the scion is wedge-shaped, and then quickly insert the split of the rootstock, so that the two layers are aligned and tied up immediately.

2. Splicing method

When cutting the scion, cut the rootstock with a smooth long slope of about 2.5cm from the lower side of the scion, cut 2-2.5cm vertically at the same width as the scion interface on one side of the cross section, cut the scion length inward and short outward, and insert the notch, so that the rootstock and scion cambium are docked or one side is aligned and wrapped.

VI. Management

Check the survival rate after half a month of grafting, and take fresh buds as survival.

Unbind while checking, and erase the sprouts of 30cm below the grafting site.

For those who fail to be grafted successfully, they will be repaired in time.

Key points of management after grafting: frequent application of thin fertilizer, timely watering, timely spraying, and good prevention and control measures of diseases and insect pests.

Ginkgo biloba green branch grafting technology Ginkgo biloba has many methods of raising seedlings, but the cost of sowing and raising seedlings is high, the young period of trees is long, and the fruit is late; the survival rate of cutting seedlings is low; hard branch grafting should be carried out in spring. The survival rate is about 80%. If the green branch grafting method is used in the growing season, the survival rate can be increased to more than 95%. The main technical points of green branch grafting are introduced below:

1. Grafting can be carried out from late May to late August. However, high temperature and drought weather can not be grafted, especially at noon on a clear day, but also to avoid rainy days.

Collect scions from the middle and upper part of the crown of the mother tree or spike nursery of ginkgo biloba, cut off a leaf on the scion in the shade, leaving only the petiole, one segment every 2-3 buds, and then soak the lower end of the scion in water or wrap it in a wet cloth. It is best to pick it up with picking, and the scions that cannot be used up on the same day can be stored in the refrigerator or cold storage.

Third, the selection of rootstocks: seedlings with strong growth, straight trunk and strong resistance for more than 2 years are selected as rootstocks.

4. The site of grafting depends on the future use of the seedlings. Those used for street trees in the future are grafted at 2.5 meters in height of rootstocks, 1.5-2 meters in dry height for courtyard planting, and 0.6-1 meters in dry height for dense planting of early chestnut in high-yield forests.

Fifth, grafting methods can be split grafting or cutting grafting. The main results are as follows: (1) the split method is first cut at the required height of the rootstock, and cut vertically in the middle of the section, with a depth of 2-2.5 cm. On both sides of the buds at the bottom of the scion, smooth slopes are cut, and the cutting surface is about 2.5 cm long. Make the lower end of the scion in a shape (the side with buds is thicker), and then quickly insert the split of the rootstock, so that the two forming layers are aligned and tied up immediately. The incision on the scion is specially required to be sealed to ensure the survival rate. But the binding should not be too tight, so as not to break the twig (2) when cutting the scion, cut a smooth long slope of about 2.5 cm from the lower side of the scion, and then cut a short slope of about 1 cm on the back, so that the lower end is flat wedge-shaped. Cut the rootstock, cut vertically at the same width as the scion interface on one side of the section, with a depth of 2-2.5 cm, cut the scion length inward and short outward, and insert the incision to form a butt or one side alignment between the rootstock and the scion.

Sixth, after two weeks of management, check the survival rate, with the hand touching a corner of the petiole or fresh buds for survival. Check and unbind at the same time, and erase the bud 30 cm below the grafting site. Timely catch-up for those who did not survive. Apply thin fertilizer frequently, timely watering, timely spraying, prevention and control of pain and insect pests. Grafting technique of Ginkgo biloba | grafting technique of twig of Ginkgo biloba

Ginkgo biloba grafting technology | Ginkgo biloba twig grafting technology-ginkgo biloba twig grafting refers to the use of current year-old twigs as scions for grafting culture in the growing season. The survival rate of this grafting method is higher than that of hard branch grafting, the growth of new shoots is larger than that of bud grafting, and the grafting time is longer, so it is a high-benefit grafting technique. The main technical points are as follows.

1. Grafting time

It can be from June to September, but the effect of grafting in August is the best, when the twigs are stout and full, the nutrients are rich, the interface heals quickly and the survival rate is higher. Grafting should be carried out at low temperature in cloudy and sunny days, but not at noon in rainy and hot weather, otherwise it will affect survival.

2. Scion preparation

The scion should be collected from the improved variety harvest nursery or excellent mother tree, and the new spike with full bud should be cut from the middle and upper part of the outer crown of the mother tree. Cut off the leaves of the ear strips, keep the petiole, align the base, tie it into a small handle, and moisturize the base with a wet cloth. Scions should be picked up as soon as they are picked, and those that can not be picked up on the same day should be stored in the refrigerator or in a cool and ventilated place.

3. Rootstock selection

2 ~ 3-year-old seedlings, cuttings and root tillers can be used as rootstocks. The selected rootstocks should have strong growth, straight seedling stem, strong stress resistance and high suitability. The height of rootstock varies according to the cultivation goal: for early fruit dense planting, the position is about 1.0m, and the seedling height is about 1.5m; for garden planting, the position is 1.5m, and the seedling height is 2.0-2.5m; for road greening, the grafting position is about 2.5m, and the seedling height is about 3m.

4. Grafting method

Splicing and splicing are commonly used, and the operation methods are as follows:

(1) splicing. ① ear cutting. Cut a section with 2-3 buds on the spike as a scion, cut a 2-3cm wedge-shaped cutting surface from each side of the lower bud, and cut it into a flat mouth at the 0.5cm above the end bud on the scion. ② anvil. Cut and cut flat on the joint of the rootstock and split longitudinally in the middle of the cross section, the depth is equal to the length of the scion cutting surface. ③ is tied up. Insert the cutting side of the scion into the split of the rootstock and align the cambium with at least one side, then tie the interface with plastic tape.

(2) splicing. ① ear cutting. Cut a section with 2 2.5cm buds on the spike as a scion, cut a slope of 1cm length on one side of the lower end of the scion, and cut a slope of length on the reverse side of the scion. ② anvil. Cut and cut flat on the joint of the rootstock, select the side with the same width as the scion cutting surface on the cross section and cut it longitudinally downward, and the cutting depth is equal to the length of the scion cutting surface. ③ is tied up. Cut the scion inward, insert the cut into the rootstock, make the two match, align the cambium, and then tie the interface with plastic film tape.

5. Post-management

The latter half a month to check whether it survived, the petiole immediately fell for survival, those who did not survive must be repaired in time, and the binding should be lifted after the interface was fully healed. It is necessary to often erase the sprouting of rootstocks, strengthen fertilizer and water management, and control diseases and insect pests in time, so as to promote the growth of good grafted plants. When the new tip of the scion grows to about 25cm, it should be protected by a pole to prevent the wind from breaking.

6. Related matters

As the twigs have not yet been completely Lignified, it is appropriate to use a thinner plastic film when grafting and binding, and not too tight, so as not to damage the scion and affect the survival. Twig grafting can also be used for high grafting and replacement, and subcutaneous grafting can also be used for shoots with a high degree of Lignification.