What are the internal factors that affect the rooting of cuttings

1) Temperature. The temperature required for rooting cuttings varies from species to species. Generally, plants are easier to take root at 15 20, and greenhouse plants that like high temperature tend to take root well at 25 30, and soil temperature is slightly higher than that of air temperature 3 5 is the most beneficial for cuttings.

The methods commonly used in production to increase soil temperature are: high furrows can be used in open fields to absorb more solar energy; In the protected area, the breeding bed (or tank) is filled with hot stuff, or heating pipes and electric heating equipment are set up.

2) Humidity. The humidity that affects the rooting of cuttings generally includes soil moisture and air humidity. Most species require the cuttings substrate to be kept moist, but the air humidity requirements are stricter, especially when cuttings with leaves, the air humidity is not lower than 80%, and it is close to saturation.

After the callus has been formed in the cuttings, the moisture of the air and soil should be properly controlled to ensure that the callus and new roots do not decay.

3) Lighting. Light has a great influence on the rooting of cuttings, especially when cuttings of green branches, cuttings with leaves are generally taken to make the leaves synthesize organic matter and promote rooting, so suitable light is necessary. However, avoid strong light exposure, because the sunlight is strong, the temperature is too high, and the evaporation is too large, which often leads to the withering of cuttings, so shady sheds, shade curtains and other shading equipment should be set up when cuttings are taken in summer.

However, under special circumstances, strong light can also be given, such as full-light fog cuttings for seedling raising.

4) Ventilation. In the early stage of cuttings, it is necessary to keep the substrate at a high humidity to prevent the cuttings from losing water and wilting, so the ventilation requirements are not too strict. However, when the cuttings have grown into a callus and begin to sprout, attention should be paid to ventilation to prevent the new roots from rotting due to lack of oxygen.

Soil (substrate) with good aeration should also be selected when cuttings, and the cuttings should not be too deep into the soil to avoid the decay of the cuttings.

5) Cuttings substrate.

The cuttings do not require any nutrients, but they should have good moisture, breathability, and the ability to hold the cuttings, and the pH should be appropriate. Commonly used species are: river sand, vermiculite, perlite, peat, plant ash, sawdust, carbonized rice husk, etc.

For species that are not transplanted immediately after cuttings and transplanted in the following year, the culture soil substrate without fresh organic matter can be added.

6) Cuttings quality.

In general, seedling cuttings are easier to heal and root than vegetatively propagated cuttings. The cuttings of young seedlings are easier to heal and root than those of old seedlings. When choosing cuttings, try to choose those with strong growth, full tissue, and full axillary buds.

The first and second year old branches are used as cuttings. However, different tree species should be treated on a case-by-case basis. Generally, poplar has the highest rooting rate of annual branches. Salix and Tamarix can be used for one to two years of branches; Conifers such as fir trees, metasequoias, cedar trees, and podocarpus can have 1.2-year-old branches at the base of annual cuttings.

1.There are many varieties of plants that are not suitable for cuttings, so first you need to confirm whether the plants you want to hand are suitable

2.Cuttings are generally made with the stems and leaves of plants.

3.It is better to have a node in the notch, so that there are more meristem cells in such a part, so it is easy to take root.

4.Temperature, too low or too high may have an effect on rooting.

5.Water, watering in moderation, too much will rot the roots. It is also necessary to remove some leaves, leave one or two buds (there must be buds, there must be buds), and leave fewer leaves to reduce transpiration and water loss.

The internal factors affecting the rooting of cuttings are mainly the type, variety, timing of cuttings and selection of flowers. Different types and varieties of flower cuttings have different degrees of difficulty in rooting.

In general, the older the mother plant, the more difficult it is for the cuttings to take root, and vice versa. Cuttings have the strongest ability to regenerate with annual shoots. Well-developed, nutritious and relatively robust shoots, cuttings are easy to survive.

The length of the cuttings should meet certain requirements, and the number of leaves should be kept appropriately, so as to improve the survival rate.

Robust and pest-free branches should be selected, generally 8 15 cm, and containing 2 3 buds of the current year's branches, and then from the bottom of the bud about centimeters under the knife, the knife edge should be smooth, and a bevel, which is conducive to rooting.

After cutting strips such as rubber trees and ficus ficus, sticky white pulp will flow out of the incision, and it is necessary to dip it in plant ash, and then rinse it with water after it is completely absorbed, and then it can be cutting, otherwise the white pulp will block the cut surface and it will not be easy to take root.

As for those succulents, such as swallow's palm, lotus palm, etc., their stems and leaves contain a lot of sap, and direct cuttings are easy to rot, so they should be left for a few days after cutting, and cuttings after the incision is dry. Except for succulents, other cuttings must be inserted into the substrate immediately after cutting the cuttings, and it must not be interrupted in between, otherwise it will be difficult to take root.

(1) Plant species: different types and varieties of flower cuttings have different difficulties in rooting. (2) Maternal condition and strip collection site The mother plant with good nutrition and normal growth contains abundant substances that promote rooting, which is an important material basis for rooting cuttings.

When hard branch cuttings, the basal cuttings are easier to root; When soft branch cuttings, the top cuttings are easier to root.

1 Factors affecting the rooting and survival of cuttings.

1) Species and varieties: fruit trees and landscaping tree species, due to different tree species, the difficulty of their branches to produce adventitious roots or adventitious buds on the root system is different. For example, the ability of branches to regenerate adventitious roots, such as mountain stator, autumn pear, jujube, mountain saga, walnut, yellow lotus, light bark tree, catalpa tree, etc., is very weak, and the ability of root regeneration is strong, therefore, branch cuttings are not easy to survive and root cuttings are easy to survive.

For example, European grapes and American grapes are easier to root than mountain grapes and round-leaved grapes. There are also differences in the difficulty of branching and rooting between different varieties of the same fruit tree or tree.

2) Age, branch age and branch location: Cuttings of branches usually cut from young trees are easier to root, but the rooting rate decreases with the increase of tree age. Cuttings with smaller branches are easier to survive than those of older branches, because the vitality of young meristems in the cortex is strong, which is the main factor for the survival of cuttings.

3) It is related to the nutrients stored in the cuttings The amount of nutrients stored in the shoots is closely related to the rooting and survival of cuttings and strips, first of all, carbohydrates have a good promoting effect on rooting. For example, grape cuttings can increase the rooting percentage after being treated with synthetic tryptophan, and measures such as ring stripping or ring hanging on fruit tree branches can make the branches accumulate more nutrients and auxin, which is conducive to the rooting of cuttings or pressed strips.

Answer]: Internal factors: (1) Genetic characteristics of plant species.

2) The influence of cuttings on their rooting. (3) The relationship between the nutrients stored in cuttings and the early rooting of the cuttings. (4) The effect of endogenous hormones on the rooting of cuttings of osmotic finches.

5) The effect of endogenous inhibitory substances on the rooting of cuttings.

Extrinsic factors: (1) soil temperature; (2) soil moisture content; (3) soil inorganic salt content; (4) Density of the soil.