How to propagate by cuttings of walnut trees, and how to take cuttings of walnut trees? High surviva

Walnut propagation is generally carried out by sowing and grafting, and cuttings cannot survive.

Graft. Grafting takes place from late March to early April. First of all, the scion is collected, in mid-March, when the buds are about to germinate, the 1-year-old branches with robust growth and no diseases and pests are collected as scion, and the varieties are stored in wet sand after harvesting, and the walnut rootstock buds germinate in early April to start grafting.

The rootstock should be grafted at a thickness of 10 cm from the ground.

Walnut grafting has a wound flow, not easy to survive, 12 hours before grafting must be carved in the rhizosphere to the xylem "water", and then split or plug the skin, after the wound is tied with a plastic strip, the upper end of the scion is smeared with paint to prevent water evaporation. After surviving, remove the sprout and loosen the tie in time, and the untying time should be carried out when the new growth is more than 20cm. When the grafted seedlings grow to about 40cm, they are fixed with small bamboo poles or wooden sticks to prevent wind breaks.

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As can be seen from the above, the walnut seedlings are mainly buried in a moist substrate to promote germination after the dormant period, and when the hidden buds give birth to small shoots, they should be able to be cultivated by cuttings.

It is estimated that after rooting agent solution treatment, cuttings in vermiculite or river sand are needed, and the length of the cuttings is about 4 cm, and the time is 4-5 months.

Walnut propagation is generally carried out by sowing and grafting, and cuttings cannot survive. Grafting with maple poplar, walnut catalpa, wild walnut, fragrant tree, etc. as rootstocks, can also be used walnut seedlings for grafting, in order to replace the excellent varieties.

Uncle fruit farmer taught everyone walnut tree bud grafting technology, so grafted walnut trees, the survival rate is generally high.

The propagation method of walnut trees can be propagated by sowing seeds.

Sowing and propagation in August and September after the fruit is ripe after the seeds, soak them in cold water for 2 3 days after harvesting, bury them in wet sand after fishing, sprinkle water once a day to keep them moist, cover the grass curtain or film moisturizing and keeping warm at night, wait for 10 15 days, and the husk can be sown after cracking. When sowing, sowing should be carried out in batches, and the depth should be 3 5cm from the surface of the soil layer.

Generally the most common is grafting, walnut trees generally use the method of scion to reproduce, the survival rate is high, the growth is robust, it is best to choose the walnut tree after the leaves are collected, and the collection is stored until April of the next year, in order to prevent the spike buds from rotting, the temperature should be kept at about minus 5 degrees, not more than 8 degrees.

Choose the tree within 20 years old, choose the smooth and thick part of the appropriate part for grafting, to plug the skin tongue grafting is appropriate, in order to prevent nutrient consumption, to eliminate the tiller in time, improve the survival rate of budding.

The pruning of walnut tree cultivation method, walnut tree should be pruned in the second year after transplanting and planting, so as not to produce dead trees, and in the first year after planting, all the buds below the grafting site should be erased, so as to concentrate nutrition and expand the amount of branches and leaves.

The transplanting of walnut tree breeding methods, walnut trees should be transplanted in deep pits, dig a square pit of one meter deep and seventy centimeters, put in the straw, and then plant the tree after a few months after the straw in the big pit is folded. If a tree is planted immediately, it may cause the tree to sink and cause a dead tree. After transplanting, it is necessary to water in time, and once every two weeks to water sufficiently, if the conditions are dry and lack of water, the number of watering should be increased.

Walnut trees generally bear fruit in 4-5 years, if grafted, the fruiting time will be advanced, in the management, to timely fertilization, so that the tree is strong and flowering.

Walnut trees can be used to split, cut, ventral and bud grafting methods, among which the bud grafting method is the simplest, but also the highest success rate, when grafting walnut trees, you can select a good growth bud, and then use a knife to cut off the branches at the upper end of the bud, and then it can be inserted into the rootstock, and wait until the second year, the walnut tree can bear fruit normally.

1. Grafting method

Walnut trees can be split and cut, ventral and bud grafting methods, among which the bud grafting method is the simplest, but also the highest success rate, the best grafting time for walnut trees is from early June to early July every year, because the temperature and humidity at this time are the most suitable for the growth of walnut trees, which can improve the survival rate of walnut trees after grafting.

2. Budding method

When grafting walnut trees, you can select buds that grow well and have no disease, and then use a knife to cut off the branches at the upper end of the buds, leaving only three compound leaves to promote the rapid growth of buds, and then use a knife to cut a small incision on the rootstock, and finally insert the buds into the rootstock, and after careful maintenance for a period of time, the walnut tree can grow vigorously.

3. Watering appropriately

When the walnut tree is grafted, the interface between the bud and the rootstock should be wrapped with plastic film to avoid rainwater dripping at the interface, so that the plant will rot in water, and during this period, there is no need to water the walnut tree, and then water the appropriate amount after the germination and germination, so that the soil can be slightly moistened.

4. Maintenance management

When the walnut tree is maintained, it needs to be provided with sufficient light, only when the light is sufficient, the walnut tree can carry out normal photosynthesis, so that the walnut tree grows vigorously, and the branches and leaves of the walnut tree need to be pruned regularly, and the dense branches and leaves are cut to increase the light transmission and ventilation between the plants, so that the yield of the walnut tree increases.

The time to raise walnut trees is generally around March and April every year. 3. Germination: Soak walnut seeds in water for three days, and then pile them in moist sandy soil.

4. Seedling: Cover the walnut seeds with soil and water thoroughly after sowing them.

1. Prepare the seeds

Before raising walnut trees, it is necessary to prepare an excellent single plant with strong adaptability, full kernels, and high kernel yield and oil content as the mother tree for seed collection, pick the seeds back and pile them up, remove the seed coat, and then directly spread them out and dry them in a ventilated and dry place.

2. Select a time

When sowing walnut trees in spring, the seedling time is generally around 3-4 months of each year, and the seedlings should be raised after the soil thaws, not too early or too late, otherwise it will affect the germination rate, and the autumn sowing should be carried out before the land freezes, but walnut trees are prone to rodent or rabbit damage, so spring sowing is generally chosen.

3. Germination treatment

Soak the walnut seeds in water for about three days, then mix them in moist sandy soil and stack them for about 35 cm, and after 10 days, the walnut seeds will break their mouths and show their white heads, and then you can start planting.

4. Carry out seedling raising

Open a ditch about 15 cm deep in the plot, keep the processed walnut seeds at a distance of about 20 cm between each one, cover the soil 6 cm thick after sowing, and water thoroughly, and the seedlings can emerge one after 25 days.