Planting experience: how do seedlings take root after transplanting? What remedial measures should be taken to show false death?

Transplanting can expand the nutrition space of seedling growth and improve the survival rate of greening. Do you know how seedlings take root after transplanting? What remedial measures should be taken if there is a false death? Let's introduce them one by one.

How do seedlings take root after transplanting?

1. Mechanical treatment.

The main results are as follows: (1) peeling: generally speaking, the varieties of fruit trees with well-developed branch cork tissue are more difficult to take root. Peel off the epidermis cork layer before cutting to enhance the water absorption capacity of cuttings and promote rooting.

(2) Longitudinal carving: cut 2 to 3 cm long at the base of the cuttings with a knife to the phloem, forming neatly arranged adventitious roots between the longitudinal wounds.

(3) Ring peeling: 15-20 days before cutting, the base of the branch prepared for insertion on the mother plant is stripped of a circle of cortex (3-5 cm wide), which is beneficial to the induction of adventitious roots.

2. Treated with biological agents. The medicament can significantly promote the rooting of seedlings, enhance the ability of root absorption and fixation, increase the ground temperature, germinate early and promote weak seedlings to become strong seedlings. When planting and transplanting, slow seedlings take root quickly, and can prevent overgrowth, disease resistance and stress resistance. It is better to longitudinally cut the base of cuttings before treatment.

3. Prepare the nutrient matrix. Before cutting, materials and substrates that are breathable, nutritious, pathogen-free and pest-free should be selected as seedbeds, such as fine river sand, perlite, burning soil and so on. The seedbed is too wet to accumulate water.

4. Adopt high quality cuttings at the right time. It is difficult and easy for different cuttings to take root. It is easy to take root, such as fir, willow, grape and so on. Those who are not easy to take root are pear and magnolia, while those that are difficult to root are pine, walnut, litchi and so on. The rooting ability of the same variety and branch will decrease with the increase of tree age. The branches are full in autumn and winter, and the rooting ability is stronger than that in spring after dormant period.

5. Control the microclimate. Microclimate mainly refers to the light, air, temperature, humidity and so on. The light is mainly slightly darker, it is necessary to appropriately increase oxygen to facilitate the life activity of the cuttings, the temperature is 23-25 °C, and the air relative humidity is 70% and 80%.

6. Heating treatment. Generally, seedlings begin to sprout at 10-12 °C, while cutting rooting at 18-25 °C is the most favorable. It is often difficult for cuttings to take root in early spring because of the warm soil, which can artificially increase the temperature of the growth part of the lower end of the cuttings, while spraying water, ventilating and reducing the environmental temperature of the upper buds of the cuttings.

What remedial measures should be taken to show false death?

After the seedlings (including fruit trees) are planted, they do not sprout for a long time, but when the branches are broken, they are green, soft and not dry. After a few months or even the next year, they sprout and grow. This phenomenon is called fake death. The reasons for the "fake death" of seedlings are analyzed as follows:

The main results are as follows: 1. The quality of seedlings is poor, the root growth is poor: the seedlings are weak, there are many root injuries, the roots are few, the upper leaves are drawn later, and the roots can not supply the necessary water and nutrients in time, resulting in the death of leaf tips.

2. Because the irrigation cofferdam is too small and too shallow, the amount of irrigation is insufficient. Although it has been watered three times, the soil ball has not been fully watered. Or because the soil ball is too big, too dry, the three water is not permeated, resulting in the lack of water in the root system at the slow seedling stage, resulting in the seedlings not sprouting, or the leaves begin to wilt, dry and fall leaves.

3. Soil consolidation, anoxia or stagnant water rotting roots: long-term drought will lead to seedling wilting, while low-lying land often causes seedling root rot due to rain and stagnant water. Therefore, the seedlings should be watered thoroughly after planting. In low-lying waterlogged areas, drainage ditches must be opened.

4. leave weak buds during plastic surgery or most of them are blind buds (bud eyes that cannot be branched): so the new buds can not be drawn out in time, resulting in delayed germination and rooting of seedlings and false death.

In addition, the phenomenon of false death of newly planted seedlings will also occur if the fixed stem is unreasonable. In order to prevent fake life and death of seedlings, we must start from the following aspects:

1. The earth ball should be removed and repackaged as soon as possible, and the planting surface height should be raised and replanted.

2. When the second situation occurs, the tree hole should be expanded immediately, and the irrigation cofferdam should be heightened. When vigorously irrigating, several holes should be pierced in the soil ball to make the inside of the soil ball permeable. 3-4 days later, the rooting powder should be irrigated to promote rapid rooting. Pay close attention to the progress of rooting and leaf spreading. When the effect is not satisfactory, the branches should be cut short properly, and remedial measures such as irrigating rooting powder and transfusion of nutrient solution should be taken.

3. If the hole soil is found to be too wet, but the root system does not blacken and rot, remedial measures can be taken, such as opening holes to dry tuo, replacing planting soil, properly controlling irrigation times and amount of irrigation and so on. If there is stagnant water at the bottom of the hole, it should be filled with sand from the bottom of the hole, or a drainage pipe should be set up in the lower part of the soil ball to drain outside the tree hole to ensure that there is no water in the tree hole.

4. Select high quality and strong seedlings. It is required that the seedlings are strong, the bud eyes are full, the seedlings are fresh, and the roots are well developed. at the same time, do not hurt too many roots and keep more roots as much as possible.

5. when planting seedlings, the root system can not be in direct contact with the fertilizer, it is necessary to spread a layer of loose fine soil on the fertilizer, and then plant it. Before planting, the soil hole was sterilized with 100,150-fold solution of ecological arrow, and the soil ball was rooting and sterilized at 1:1 with Shenggenbao and ecological arrow, and the survival rate was increased by 80%.

6. the trunk of young trees depends on the buds, and those in the plastic belt must be full buds to avoid leaving weak buds and blind buds.