How many days does it take for lychee grafting to know whether it is dead or alive?

After lychee grafting, it is generally about half a month to 20 days to know whether it is alive or not. However, there will be differences in different seasons and different tree conditions and different grafting methods, and the specific problems will be analyzed on a case-by-case basis.

It is not possible to generalize.

At this time, the temperature is not very high, and it is not too dry, at this time it is relatively easy to survive grafting, and the survival rate is relatively high. Generally, half a month after grafting, you can see whether it has survived.

The temperature in autumn is similar to that in spring, and the autumn is high and cool, which is very suitable for lychee grafting, and the grafting survival is relatively fast, and the survival rate is relatively high. Generally, about 20 days after grafting, you can see whether it is alive or not.

In other periods, the survival of grafting is relatively slow, and the survival rate is also relatively low. Grafting is generally not recommended in summer or winter, although it can be grafted to survive.

There are many methods of lychee grafting, and the survival rate of small seedlings grafted on the nursery is relatively fast, and the survival rate is relatively high.

Nowadays, there are relatively few new lychees, so there are not many nurseries grafted, but more varieties are renewed on old trees. There are two common methods of grafting on old trees.

The first is to directly cut off the large branches and graft them, which we call the large branch grafting method. At present, this method is being promoted, which can effectively shorten the time of high grafting, at least about half a year, but from the current situation, the survival rate is not high, and many times it cannot reach half of the survival rate.

The second is the most commonly used method of high grafting, which is to cut off the large branch, let it grow new branches again, and wait until the new branches are old and mature before grafting, which is quite a nursery seedling grafting, which we call the twig grafting method. This method has a high survival rate and is currently the most widely used method.

If the scion has not yet grown new shoots, or there is no sign of budding of the scion, but the scion is still relatively green, it means that it is not dead and can generally survive.

If the scion has not sprouted, there is no sign of germination, and it has turned black or dried up, it is a sign that it is difficult to survive, or even has died, and needs to be grafted again.

One month. Because lychee also has a certain growth cycle after grafting, it must be known after 30 days.

After the lychee is grafted, it will be known whether it will survive or not in about 30-45 days, which is enough time for the lychee to germinate slowly, and the specific progress depends on the treatment of the interface.

Generally, after a week or two, you will know that you are dead and alive, and if the lychee does not grow new shoots after a week of grafting, there is almost no hope of survival, and if it grows new shoots, it will live.

In some areas of southern China, due to the immaturity of grafting technology and other reasons, the high-pressure method is still used for cultivation, resulting in the slow development of lychee production and unable to meet the needs of the market. On the other hand, the high-level grafting technology of lychee has the characteristics of strong technology and seasonality, which can save labor and cost, and provide new opportunities for the development of the lychee industry.

1 Grafting period selection.

The selection of the grafting time of lychee is very important, and the determination time of the truncation of the main trunk will directly affect the growth state after the truncation. Lychee grafting is generally spring.

Grafting and autumn grafting, starting from March to May every year, late April to late May is the most suitable, this period of scion survival rate is high, germination rate is high, and is conducive to rootstock nutrient accumulation, vigorous growth. Autumn grafting was carried out from August to September, and the effect was poor.

2 Grafting weather options.

Plant growth is closely related to weather conditions, and growers need to carefully choose the grafting weather according to the growth needs of lychee. On a cloudy day.

Or sunny morning and afternoon (temperature is 20 25) grafting is the most suitable, which has a positive effect on the recovery and growth of lychee scion, and at this time, the scion healing germination is higher, and the germination rate is in. If the temperature exceeds 35, it will directly affect the germination rate of the scion, and the growth of the meristem at the interface will be hindered, forming callus, resulting in the water supply is difficult to keep up with and easy to die.

3 Grafting method.

There are two main types of lychee high grafting: lap grafting method and tongue grafting method. When using the lap method for high-level grafting, the scion requires an inclined plane.

Cut below 30°, cut the lower end to visible xylem, the incision is cm long, cut out a smooth long section cm longer than the rootstock, single bud bud node is longer, bud node short with double bud graft. The rootstock also has an oblique cut angle of less than 30°, a slightly shorter cut than a scion cut, and about the same width.

When the rootstock is in the vigorous growth period, it is also the most active stage of the cambium layer, which is conducive to the robust growth of litchi trees after grafting.

With the development of science and technology, high-level grafting technology can effectively alleviate the slow production of lychee. However, it is necessary to pay attention to various technical points, such as selecting the appropriate weather and period of grafting according to its growth needs, adopting the correct method, selecting a suitable rootstock and scion combination, and timely controlling pests and diseases and unbinding after grafting, so as to improve the survival rate and fruiting rate of lychee.

4 May is suitable. Because lychees begin to sprout and grow in April and May, grafting is the most suitable time.

It is best to graft in March and April in the spring, when the temperature is suitable for the growth of lychees. After grafting, nitrogen fertilizer and potassium fertilizer should be supplemented in time to promote the growth of plant rhizomes and keep the soil moist.

Lychee grafting time.

The suitable time for grafting varies depending on the region and the grafting method. In Guangdong, the suitable time for grafting is 2 April in spring and 9 October in autumn, and bud grafting should be in April 10. In Guangxi, February and May and September and October are the most suitable; Fujian shoots were grafted in March and April, and patch buds were grafted in April and August. Sichuan Luzhou is the best in April and May. Check 30 to 40 days after grafting, and those that do not survive should be mrafted in time and the anvil buds should be erased.

Lychee grafting method.

Seedling grafting is mostly used in cutting, splitting and improved jointing. Generally, the rootstock is grafted at a distance of 15 to 20 cm from the ground, and the knife used for grafting must be sharp. At least one side of the anvil cambium is aligned when jointed, and it is fixed and sealed with a centimeter-wide, 30-35 centimeter-long plastic wrap tape.

At present, the grafting of lychee trees mainly adopts cutting and tongue grafting in branch grafting. The advantage of cutting is that as long as there is a suitable temperature, it can be grafted at any time, and it is not limited by other factors. Generally, the grafting of lychee trees is carried out in spring and autumn, and the survival rate of lychee tree scion is high and the seedlings emerge quickly.

Here are the steps for grafting a lychee tree:

1. The rootstock of the lychee tree is cut off from a smooth part, cut into an inclined plane, and cut a knife downwards at the edge of the xylem, and the length of the incision corresponds to the width and the long surface of the scion. The rootstock is open on one side, and the rootstock is cut off the upper part.

2. Choose robust 1-2-year-old lychee tree branches as scion, and need lychee tree branches that are free of diseases and insects, have full growth and full buds. One end of the lychee tree scion retains 1 3 strong buds, and the other end of the scion can be cut into a 1 2 cm long bevel.

3. It is best to graft the cut lychee branches on the same day to prevent the lychee branches from drying up. Insert the lychee tree scion into the incision, and the joint can be tied tightly with a plastic bag.

Summary. Lychee tree grafting is generally carried out in March to May in spring or September to October in autumn. When cutting the anvil, the branches should be cut from a distance of meters from the ground, leaving 9-12 stakes for each plant.

The scion is cut from the robust mother plant. The rootstock should be removed from the cortex to form a mouth of the same size as the scion cut surface, and finally the interface can be bandaged.

Lychee grafting is generally carried out in March to May in spring or September to October in autumn. When cutting the anvil, the branches should be cut from a distance of meters from the ground, leaving 9-12 stakes for each plant. The scion is cut from the robust mother plant.

The rootstock should be taken to remove the bark and branch layer, so that it forms a mouth with the same size as the scion cut surface, and finally the interface can be bandaged.

That's it.

Hello farmers, Xiao Wang is here to promote planting technology to you again. Different plants have different planting methods, and only scientific and reasonable planting management can increase income with quality and quantity. Here's what you need to know!

Lychee graftingIt is a method of using the branches or buds of excellent varieties with high yield, stability and strong resistance as scion, with resistance and adaptability, and the seeds of varieties with developed root systems are cultivated from live seedlings as rootstocks, and are propagated by grafting and seedlings, so how to improve the survival rate of litchi after grafting?

Grafting Essentials:

1. The cambium should be aligned The stems of all dicots have a cambium layer between the bark and the wood, and this cambium is also the growth point of the plant, growing wood inward and outward. When grafting, the forming layer must be aligned, that is, the junction of the mother wood and the leather-grained spike wood should be docked, otherwise the spike is not easy to survive.

2. It is very important for the grafting interface to be tightly wrapped and grafted, and it is not possible to miss any link, even if you do a good job in the previous link, there is a link that is not done well, but it will lead to a much lower survival rate. Here's a tip: do (bud wrapping in autumn, budding in spring and summer).

If they are not tied tightly, the scion will lose its vitality through dehydration before becoming viable, and in severe cases, die. Use a plastic tie when tying a tie and seal it well.

3. Do not use germinated scion grafting should be carried out under warm temperature, the buds are full but not germinated before grafting, and grafting with germinated branches will reduce the survival rate.

4. Don't graft on rainy days to avoid grafting on rainy days, this kind of weather will reduce the survival rate.

5. The branch grafting should be "white", and the old tree should leave the cuttings of the secondary branch scion not all plugged, and some of the growing healing tissue should be exposed and connected with the healing tissue at the top of the mother wood, and the cuttings should be sealed to avoid being blown off by the wind.

How to improve the survival rate of grafting?

1) Choose rootstocks and scion with strong affinity and good affinity for close relatives.

2) Choose a strong, pest-free rootstock that is fully developed.

(3) Choose scion with full and mature branches, freshness, high water content (no mold, no dryness, no wrinkles), short internodes, and full buds.

4) Strict treatment, the cutting surface of the rootstock and spike should be large and flat, the cutting edge should be clean, the cambium layer should be aligned and closely connected, and the rapid operation should reduce water evaporation and oxidation of the cutting surface, and be firmly rooted.

5) Keeping the interface moist is key to survival.

Be sure to choose high-quality seeds, and then you should also choose fertile soil, timely watering and fertilization, to ensure that the light is sufficient, when planting should also control the temperature of the problem, the temperature needs to be controlled at about 23, in the grafting must pay attention to the survival rate, learn professional grafting technology, after grafting must be wrapped in the grafting interface, to avoid grafting in rainy or windy weather.

When grafting lychees, the situation of lychees can be observed in time, and the lychees should also be cleaned and watered in time, so as to improve the survival rate of lychees.

The survival rate of lychee grafting is high, and it is very necessary to choose the appropriate grafting time. In general, grafted plants will choose spring for grafting. Plenty of water is sufficient.

How long does it take for a lychee tree to get married after grafting, and it can bear fruit after grafting a litchi tree in 2 or 3 years. Lychee trees can be grafted all year round, and when grafting, a bevel is cut on the rootstock and a longitudinal cut is made at the edge of the xylem. Then select the sturdy lychee branches as the grafted scion, keep 3 bud points at one end of the scion, and cut the other end into an inclined plane corresponding to the rootstock.

After that, the scion is inserted into the incision of the rootstock and tied tightly.