Propagation technique of lemon tree

The methods of lemon reproduction are divided into two categories: sexual reproduction and asexual reproduction. Sexual reproduction comes from seed sowing, which is also called seedling. Asexual reproduction comes from part of the vegetative organs of lemon, also known as vegetative reproduction, there are grafting, cutting, striping, tissue culture and other methods, of which grafting reproduction is the most common, let's take a look at lemon tree reproduction technology!

Seed propagation of lemon tree

The lemon plant with strong growth and no diseases and insect pests was selected as the seed mother tree. The lemon fruit was picked when the fruit was fully ripe from November to December, and the fruit was cut open after a few days. The seeds were rinsed and sowed immediately, or preserved in the fruit. The dry seeds should not be stored for a long time in spring, and the fresh seeds could germinate in only 7 days under the condition of 15-25 ℃.

Cutting propagation of lemon tree

Lemon cuttage is very easy to survive. In late May, the healthy spring shoots of the same year are pruned, leaving 3-4 buds to cut into cuttings, except for the top bud, the rest are cut off, cut in sandy soil, immediately watered after cutting, and then watered every few days to ensure that the leaves remain green and not wilted after cutting. after a month, the terminal buds begin to grow, and clear dung water is applied every 20 days, which can produce summer and autumn shoots. It can be transplanted in autumn.

Lemon tree striping propagation

Lemon striping propagation mainly adopts high pressure propagation. The vigorous growing branches without disease and insect pests are selected as the breeding mother branches from May to June. In the high pressure part, the leaves are removed, the skin is peeled off by a knife, and the skin is removed, but the xylem is not injured. Then the plastic film of about 12 cm in length and 10 cm in width is used to fasten the film 2 cm away from the lower part of the peel to form a cylinder. Fill the loose and fertile garden soil into the cylinder, fill it to form a fist-sized mass of mud, and then fasten the upper end firmly. After high pressure, the leaves show light green, white roots grow in the plastic bag, and gradually spread all around, indicating that the high pressure is successful. Cut off the branches in the lower part of the plastic bag from September to October, gently remove the plastic film, be careful not to break the mud, plant it in a flowerpot, water it thoroughly, and slow down the seedlings in the shade. After 10 to 15 days, gradually increase the light, and soon new leaves can grow.

Tissue culture of lemon tree

Cut the sterilized stem tip to make it 5-8 mm long, and then keep the polarity and inoculate it on the callus induction medium. After 3-4 weeks of culture, the explants began to form callus. At this time, it can be cut off and transferred to the bud induction medium. After several weeks of culture, bud clusters can be formed, which can be cut off and transferred to root induction medium. After 3-4 weeks of culture, regenerated plants with roots can be formed. The culture temperature is 24 ℃, the light intensity is 1000 lux, the light intensity is 8 hours and 12 hours per day.

Grafting propagation of lemon tree

1. Splicing: splicing is often used in spring. The grafting effect is better when the sap begins to flow. Sichuan and Chongqing can be grafted within half a month before and after the Rain and Water Festival, and Guangdong has a high survival rate within 40 days after the Beginning of Spring. In years with low temperature, the grafting time can be postponed to May. The cutting operation is simple, the germination is fast and the growth is fast. It can reach the specification of coming out of the nursery in the same year, and can be planted in autumn or the following spring.

2. Abdominal grafting: abdominal grafting is generally used for autumn grafting, which can be carried out from Rain Water's festival to the first ten days of November. The survival rate of ventral grafting is higher, and it can be rejoined for 2 or 3 times. The scion cutting method is the same as the cutting method. At about 10 cm from the ground, the smooth surface is longitudinally cut from top to bottom, and the length is about 2 cm. The cutting depth is suitable for no injury or slight injury to the xylem. After the mouth is opened, the scion is embedded and the interface is tightly sealed with plastic film strip from bottom to top.

3. Budding: budding can be divided into two types: small bud grafting and small bud ventral grafting. Small bud grafting is mainly carried out in spring and small bud ventral grafting is mainly carried out in autumn. The budding speed is fast, the work efficiency is high, the wound of the rootstock is small, and it is easy to heal. When cutting buds, hold the scion in the left hand, hold the knife in the right hand, put the knife edge flat, cut from the lower 1 cm of the bud to the upper end of the bud to 0.5 cm above the bud, make the bud with xylem, and then cut the scion down vertically with a knife to remove the bud piece.