How does the latest tree grow?

Banyan trees, also known as fine-leaf banyan, evergreen, banyan beard and so on, can be used as street trees, bark fibers can be used to make fishnets and artificial cotton, air roots, bark and leaf buds can be used as heat-clearing and antipyretic drugs, and common propagation methods are cuttings, pressing strips, burying strips, and so on. In the greenhouse in the north, it is often carried out between green summer and combined with shaping and pruning, and occasionally there are methods of sowing and breeding or field control. Let's take a look at these breeding methods of banyan trees.

Cuttage propagation

After the temperature warms up in spring, the 1-2-year-old branches are cut into segments 5-15 cm long, each containing 3-4 bud nodes, the lower leaves are removed and the upper leaves are retained. When the blade is large, it is rolled into a tube and tied tightly with string. Cuttings are cut in sand beds or flowerpots, accounting for 1. 3 of the cuttings. After cutting, it is covered with plastic film to keep moisture and heat preservation, and the temperature is controlled at about 25 ℃. After 30-45 days of rooting and sprouting, it can be transplanted into pot, and rooting can be promoted by using ABT1 rooting powder before cutting.

Striping propagation

The family culture of banyan can be propagated by pressing strips or high branches. Part of the branch will be put into the middle, compacted and watered, generally after about 30 days to take root. The method of high branch pressing is to select a 2-year-old branch, peel the smooth part of the branch in a ring, peel 1.0-1.5 cm in width, wrap the wound with wet peat and moss, and finally wrap it with plastic film, bind the upper and lower ends, and tie several small holes in the film to breathe. Cut off the potted plant after the root grows.

Sowing and reproduction

The root system of banyan seedlings is developed, easy to shape, and more seeds are used to propagate. Sowing seeds should be along with seed collection, treatment and sowing. First wrap the ripe berries with cotton gauze, scrub and wash them in clean water, then sow them directly in the finished sand bed or flowerpot after 2-3 days, remove the sowing, do not cover the soil, spray clean water 1-2 times a day, and keep the bed moist. Under the condition of 25-30 ℃, ten plants sprouted one after another 10 days after sowing. Plastic arch sheds should be built on the bed surface after sowing to prevent heavy rain from scouring. After 15 days of growth, 1% urea or potassium diargon phosphate was sprayed on the leaf surface. Transplant into the basin when it grows to 6-7 leaves.

Grafting propagation

1. Green branch grafting: selection is growing. But uncapped strong shoots of the same year were used as rootstocks, and more mature shoots of fine varieties were used as scions for grafting. Stop watering a few days before grafting to reduce excessive bleeding during grafting. The thickness of the rootstock and the scion must be the same. The scion is 2-3 cm long, leaving the terminal bud and the uppermost 2 leaves, and the lower end is cut into a "V" shape. Remove the top of the rootstock and cut it down vertically to 1 cm along the pith with a blade. Insert the scion into the "V"-shaped slot of the rootstock, align the edge of the cambium, and bind it tightly with plastic film. Finally, cover it with a thin film, water it thoroughly, put it in a ventilated and bright place, and uncover the film for ventilation once a day. Generally, it takes about 45 days to survive and release.

2. Hard branch grafting: grafting before budding and growth in spring. The diameter of the branch and stem of the rootstock should be more than 1 cm. The bottom diameter of the scion is about 0.8 cm, 5 cm long, leaving a single bud, but no leaves. Cut flat at the interface of the rootstock when grafting, and cut vertically at the joint of the rootstock according to the diameter of the scion. Then insert the wedge-shaped lower end of the scion into the slit of the rootstock, align the two cambium, and bind it tightly with a plastic film. Finally, the interface is sealed with a thin film to prevent moisture loss. After grafting, remove the leaves below the grafting place of the rootstock to promote scion sprouting and branching.