The latest course of Lemon Tree Propagation techniques and methods

Lemon reproduction methods are divided into sexual reproduction and asexual reproduction two categories, sexual reproduction from seed cultivation, also known as seedlings. Asexual propagation by the lemon part of the vegetative organ culture, also known as vegetative propagation, grafting, cuttage, layering, tissue culture and other methods, of which grafting propagation is the most common, let's take a look at lemon tree propagation technology!

lemon tree seed propagation

Lemon plants with strong growth and no diseases and insect pests are selected as seed collection mother trees, lemon fruits are picked when the fruits are fully ripe in November and December, the fruits are opened after being placed for a few days, seeds are taken out and rinsed, seeds are immediately sown, or stored in the fruits, and seeds are taken out and sown in spring, dry seeds are not suitable for long-term storage and are easy to lose germination power, and fresh seeds can germinate in only 7 days under the condition of variable temperature of 15 - 25 DEG C.

Cuttage propagation of lemon tree

Lemon cuttings are easy to survive. In late May, prune the healthy spring shoots of the current year, leave 3~4 buds and cut them into cuttings. Except for one leaf of terminal bud, cut off the rest, cut them in sandy loam soil, water immediately after insertion, water once every few days to ensure that the leaves after insertion keep green without wilting phenomenon. After one month, the terminal buds begin to grow, and clean excrement water is applied once every 20 days. Summer shoots and autumn shoots can be produced in the same year. Transplant in autumn.

lemon tree layering propagation

lemon layering propagation mainly adopts high pressure propagation, selecting branches with vigorous growth and no disease and insect harm as breeding mother branches in May to June, removing leaves at high pressure parts, peeling off cortex with a knife in a circular shape for 4 to 6 cm, but not damaging xylem, then using plastic film with length of about 12 cm and width of about 10 cm, tying the film firmly with thread at the position 2 cm away from the lower part of peeling, forming a cylinder shape, filling loose fertile garden soil into the cylinder, Fill it up to form a fist-sized mud ball, and then tie the upper end firmly. After high pressure, the leaves are light green, white tender roots grow in the plastic bag, and gradually spread around, indicating that high pressure is successful. Cut off the branches at the lower part of the plastic bag in September to October, gently remove the plastic film, pay attention not to break the mud mass, plant it in a flowerpot, pour water thoroughly, put it in the shade to slow down the seedlings, after 10 to 15 days, gradually increase the light, and soon new leaves can grow.

Tissue culture of lemon tree

Sterilized shoot tips were cut to 5 - 8 mm in length and inoculated onto callus induction medium while maintaining polarity. After 3~4 weeks of culture, the explants began to form callus. At this time, it can be cut off and transferred to bud induction medium. After several weeks of culture, buds can be formed, 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 24~26℃, the illumination is 8~12 hours every day, and the illumination intensity is 1000~2000 lux.

Grafting propagation of lemon tree

1, cutting: spring more use of cutting. The grafting effect was better when sap began to flow, Sichuan and Chongqing could be grafted half a month before rain festival, Guangdong had a high survival rate within 40 days after spring. In cold years, grafting can be postponed to May. Cutting operation is simple, germination is fast, growth is rapid, can reach the nursery specifications in the current year, autumn or spring of the following year can be planted.

2, abdominal grafting: abdominal grafting is generally used for autumn grafting, from the rainy season to early November can be carried out. The survival rate of ventral grafting is high. If one time is not alive, it can be regrafted 2~3 times. The scion cutting method is the same as that of cutting grafting method. At about 10 cm from the ground, the smooth surface is selected to cut longitudinally from top to bottom, about 2 cm long. The depth of cutting is appropriate without damaging or slightly damaging xylem. After opening the mouth, insert the scion immediately and tie the sealing interface tightly from bottom to top with plastic film strips.

3. Bud grafting: Bud grafting can be divided into two types: bud cutting and bud ventral grafting. Bud cutting is mainly carried out in spring, and bud ventral grafting is mainly carried out in autumn. Bud grafting speed, high efficiency, rootstock wound small, easy to heal. When cutting buds, hold the scion upside down with your left hand, hold the knife with your right hand, put the knife flat, cut from the lower end of the bud 1 cm to the upper end of the bud 0.5 cm, so that the bud has a small xylem, and then cut the scion vertically downward with a knife to remove the bud.