How to propagate flowers and trees by layering method

How to propagate flowers and trees by layering method

How to breed flowers and trees by layering? The layering method is a common method to propagate flowers and trees, but many people don't know how to propagate flowers and trees by layering method when they are young. The following article introduces in detail how to propagate flowers and trees by layering method, hoping to help women who want to know about layering method.

How to publicize the layering time of Huamu 1 by layering method

Generally, layering is carried out before germination in early spring or late autumn, and layering is cut off in spring and autumn, and it is carried out in the following spring. Evergreen trees cultivated in the open field should be layered in rainy season.

Treatment of layered part

Because the injured part is easy to accumulate nutrients synthesized in the upper part and produce hormones, measures such as carving and girdling are adopted to treat the layering part to promote rooting. On the compacted soil, carve several scars in the vertical direction or 1 ~ 2 times in the horizontal direction until reaching the xylem. This method is mostly used for flowers that take root easily. Or cut off 1 ~ 2 tongue-shaped cortex with a small amount of xylem. Others need to peel off a wide phloem and scrape the cambium clean to prevent them from producing callus to connect the cut phloem. If necessary, dry the xylem at the wound and then wrap it with soil to promote the formation of new roots in the cambium above girdling. This method is mostly used for flowers with difficulty in rooting. Some soft and easy-to-peel flowers, in order to improve work efficiency, often twist the compressed part by hand to separate the phloem from the xylem.

air layering

Also known as high-pressure method, porcelain layering method, high-altitude layering method and so on. The method can be used for breeding tall plants without tillering buds at the flower base, or varieties whose branches are not easy to bend, or which cannot be propagated by other methods, such as Chinese rose, azalea, osmanthus fragrans, camellia, Milan, Prynne, Magnolia grandiflora, rubber tree, lemon, kumquat, bergamot, octagonal golden plate, bamboo banana, wisteria, etc. In late spring and early summer. Generally, 2-year-old robust branches are selected and peeled annularly under the nodes, or peeled in half, or deeply cut into the cortex. Conditionally treat with rooting hormone, tie a plastic film at the lower end of the incision 2 ~ 5 cm, then roll it up, fill the plastic film with moss or soil, tie it up, leave a gap for watering, and bring rain if you are outdoors. You can also cut a bamboo tube or a small plastic bottle and put it on the incision, and fill it with moss or soil. Always keep moss or soil moist in the future. When more roots are produced, they are cut off from the mother plant for culture, especially the larger branches.

Stratification of mound

It is also called overburden. Suitable for flowers and trees with many tillers or branches that are not easy to bend. Such as peony, azalea, pittosporum, hydrangea, snow, goldfinch, begonia, laurel, Daphne odora, magnolia grandiflora, forsythia, bauhinia, etc. , can be propagated by stacking soil and layering. The dormant mother plants were re-pruned near the ground 10 ~ 20 cm, which promoted a large number of new branches. When the new branch grows to 20 cm, it is scratched. Then raise the soil by 20 ~ 30 cm to keep the soil moist at all times. After taking root, dig out the pile of soil and cut it off from the mother plant.

Recumbent stratification

Suitable for plant species with long branches or vines, such as Yingchun, Yezihua, Jasmine, Vine, Ivy, Lingxiao, etc. Bend the branches to the ground so that they lie flat on the soil surface, or introduce them into shallow ditches. Then cover the soil with about 15 cm, and fix the buried part to prevent the branches from popping out of the soil surface after watering. Big branches should be made into U-hooks with steel bars, inserted into the ground, or fixed with wooden stakes. The tops of branches should be exposed to the soil. If you cut each node with a knife, you can get most seedlings at once. Lianas and flowers can bury their branches in waves in the soil.

How do flowers and trees propagate in layers? Before layering, the buried part needs to be carefully carved. If possible, it is best to smear 2000 micrograms/gram of NAA on the carved part, and then bury this part in the soil. In order to prevent the branches from popping out, you can use stones to hold them down and insert a bamboo pole to support them, so that the tips of the branches can grow upright.

The layering seedlings in spring can form their own roots after growing in summer and autumn, so they should be cut off from the mother before defoliation 1 month, and let the layering seedlings grow on their roots for a period of time. Dig seedlings before winter, and the south can plant them directly in the nursery to continue to cultivate large seedlings; In the north, we should dig our heels and bury the soil to prevent the cold, and then plant them in the next spring.

Lianas such as honeysuckle, wisteria, lingxiao, Roche (jasmine), grape, Parthenocissus tricuspidata and radix aucklandiae all have long, soft and withered vines. If scaffolding is not built artificially and there are no other objects nearby to climb, branches and vines will crawl and grow on the ground. This kind of flowers and trees has strong rooting ability. When they encounter wet soil, they will naturally take root, and the axillary buds on the nodes will germinate at the same time and grow new buds.

When breeding, these branches can be straightened and buried in human soil, the depth is not more than 3 cm, and they can take root in about 20 days, then axillary buds germinate and emerge, and then new branches and vines are pulled out. At this time, the branches and vines in the soil can be disconnected from the internodes with a sharp shovel, and then dug and transplanted after growing independently for a period of time.

The axillary buds of some flowering shrubs are not resistant to water and humidity, so it is impossible to bury all the branches in the soil by continuous layering, otherwise the axillary buds will often rot and new branches will not be produced. The correct way is to nest the branches into waves, with 1 node buried in the soil and 1 node exposed from the soil surface. At the same time, insert a thorny tree weight or N-shaped lead wire into the soil to fix the nodes buried in the soil to prevent rebound. After the underground node takes root, it can promote the axillary buds of the aboveground 1 node to sprout new branches, and then cut off the nodes in front of the new branches in turn to form several independent clusters.

Clove, elm leaf plum, begonia and other flowers and trees have thick branches, so it is quite difficult to overwhelm them. When this kind of flowers and trees multiply in large quantities, the perennial clustered old plants can be used as the female parent. First, make a big wound at the base of each branch, then lift the mound to cover the base of the whole plant cluster, and keep the mound moist through irrigation. After a period of time, a large number of new roots can grow at the wound. In late autumn or early spring of the following year, the mounds are torn apart, gradually cut off from under the new roots, and then seedlings are planted.