The principle of tree cuttings rooting, the basic theory of fruit tree cuttings rooting

The cells of plants are totipotent, and each cell has genetic material.

Therefore, in the right environment, it has the ability to generate the same plants.

Rationale:Plant cellstotipotency and regenerative function of the plant body

Totipotency in plant cells refers to the fact that each cell has the same genetic material and has the potential ability to form the same plant under suitable environmental conditions. The regeneration skill of the plant body means that when a certain part of the plant body is injured or removed, and the whole plant is destroyed, it can show that you do not damage and restore the coordination function.

After cuttings, healing tissue is usually generated at the cut section below the leaf marks of the cuttings to form a growth point. Under the conditions of suitable temperature and humidity, a large number of adventitious roots occur at the base of the cuttings, and the aboveground parts sprout and grow into new plants.

There are the following four methods: rapid dipping method, soaking method, powder treatment method, foliar spray method, and the dosage is as follows:

1. Quick dipping method.

The cuttings were soaked in ABT rooting powder with a content of 500-2000 for 30s before cuttings. Because the cuttings treated by this method are only attached to the surface of the soaking site, and gradually disappear with the washing of water after cuttings, it is difficult to ensure the need for rooting materials in the process of adventitious root formation of cuttings. In cuttings, this method is used only when single-bud cuttings or repeated treatments are used.

The general treatment content is 500-2000, and the processing time is 30s.

2. Immersion method.

The soaking method is to prepare ABT rooting powder into a low-content solution, and then soak the lower part of the cuttings in the solution for 2-12h. This treatment method is particularly important for dormant branches, because it is conducive to the elution of inhibitory substances inside dormant branches, which is not affected by external environmental conditions, and can ensure that all the chemical solutions absorbed by the cuttings are used for the formation of adventitious roots.

Generally speaking, large branches should be soaked in 50 or 100 liquid medicine for 4-6h or only soaked in the part with latent adventitious root primordium, and 1-year-old dormant branches should be soaked in 50 or 100 liquid medicine for 2h. According to the lignification procedure of the branches and the size of the cuttings, the young cracked plum base branches can be soaked for 1-2 hours, and the soaking depth is 2-4.

3. Powder treatment method.

Before cuttings, ABT rooting powder is applied to the base of the cuttings, and then cuttings are made. During treatment, the base of the cuttings is first moistened and inserted into the powder, so that the incision at the base of the cuttings is fully adhered to the powder, or the powder is mixed with water to make a milk and applied to the incision. When cuttings, be careful not to let the powder fall.

The advantage of this treatment is that the method is simple, and the disadvantage is that the powder adhered to the incision under the cuttings is easy to dissolve in the cutting matrix with spray or falling water.

4. Foliar spraying.

This method is often used for cuttings or sowing seedlings. When cuttings and seedlings are raised, the diluted solution of ABT (10-40 sprays is sprinkled on the leaf surface. It is very effective for tree species such as five-needle pine and Araucaria that have a long rooting time.

ABT is continuously replenished in the foliar surface, which is also in line with the law of polar transport of ABT in plants. Foliar sprays are simple and easy to apply and are widely used in production.

The function of rooting powder

Rooting powder can promote the synthesis of biological macromolecules, induce the formation of adventitious roots or adventitious buds, regulate the metabolic intensity of plants, and improve the survival rate of seedlings and afforestation, as well as crop yield, quality and resistance by strengthening and regulating the content of endogenous hormones and important enzymes of plants.

It is applied to cuttings and seedlings, which can promote rooting, shorten rooting time, improve rooting rate, and make cuttings of hard-to-root tree species successfully propagated, and its efficacy is better than that of indole butyric acid and naeacetic acid; Afforestation can improve the emergence rate, preservation rate, and increase growth. By soaking seeds, spraying seeds or plants, treating roots or tubers, etc., a series of physiological changes occur in various crop seed seedlings, improve the germination potential and germination rate of crop seeds, accelerate vegetative growth, deep roots and leaves, and make crop ontogeny and robust.

The above content refers to Encyclopedia - Rooting Powder.