Collection and sand collection of Zhuliu species

The cutting propagation is a kind of complete new plant, which is inserted into soil, sand or other matrix under certain conditions of plant vegetative organ roots, stems and leaves, so that this part of the vegetative organs grows out of the mother's body and lacks other parts. Breeding methods. The types of cutting propagation include branch insertion, root insertion and leaf insertion. In the practice of seedling production, branch insertion is the most widely used. As a new species of willow tree, bamboo willow is an easy-to-root plant. In the absence of current seedlings, in addition to Cologne Industries (http://) adopting plant non-tube high-efficiency rapid propagation technology, most people may rely mainly on cutting propagation. . The treatment of the seed strips has a close relationship with the survival rate, growth potential of the cutting seedlings and the growth of the saplings after planting. The methods for collecting and sanding the bamboo strips are briefly introduced.

1 kinds of choice

The seedlings were best when they were grown vigorously, full of shoots, no pests and diseases, fully matured, and had no side branches. Due to the restriction of conditions, you can also choose from 2 to 3 years old. However, it must be a strong branch that will germinate after trimming in the past. When selecting, you should pay attention to distinguish between the current year and the previous year.

2 kinds of strip collection

Collection of strips can be combined with summer and winter pruning, usually collecting upper and middle branches. Two types of cuttings were collected: the first type was collected by shoots, placed under the shade, sprayed with moist water and covered with wet sacks. Twig in summer, strong growth, high photosynthetic efficiency, strong nutrition and metabolic activity, is conducive to rooting. The second type is hard-branch collection, which can be collected during the spring and autumn seasons, but it is better in the autumn. The collection time is usually before the fall of autumn leaves until the sprouting of spring buds, the dormant branches of the winter shears have been fully lignified, the branch buds are abundant, the storage is rich in nutrients, and it is also conducive to rooting.

3 cuttings cutting

First, remove the parts where the tip tissues are not full and the degree of lignification is slightly inferior. Select the branches with a thickness of 0.3 cm or more, cut and cut about 7 cm of cuttings (guaranteed 3 buds), and cut the upper leaves 0.5 cm away from the first winter bud. Above, the incision should be smooth, and the lower incision should be about 1 cm from the bottom bud, which can be cut into a horse ear shape. Note that sharp cut pruning shears or special trowel should be used to cut the cuttings, and do not cause nicking of the incision or detachment of the cortex and xylem. After the cut-off, they are coarsely subdivided and bundled with 50 or 100 strains.

4 Storage of cuttings

Twig cuttings are cut as early as possible after summer cuttings and maintain a certain humidity to prevent loss of leaves. Autumn cuttings Cutting spring cuttings should be stored in winter. The method is divided into chamber method and trench storage.

(1) Indoor Sand Method

Select a chamber with a relatively small temperature difference and lay 5-10 cm of wet sand at the bottom. Place the bundled cuttings on the sand. The lower part of the physiology is downward, and then lay 5 centimeters of wet sand and put a second layer of cuttings. Until the 5-6th floor after the sand cover. It is strictly forbidden to close the room after it has been placed. When the room temperature is too low, grass and other coverings are added above, and regular inspections are performed to supplement the moisture and indoor ventilation.

(2) Ditching sand trap method

Choose a dry shady trench to dig, the depth of the trench can be determined based on the depth of the frozen soil. The appropriate depth should be such that the cuttings are at the lower limit of the frozen layer and the cutting temperature is about 2°C.

Before the cuttings enter the ditch, lay 5 cm thick wet sand at the bottom of the ditch. The moisture content of the wet sand is about 60%. Put the bases of the bundles of cuttings downwards and put them in the ditch. Cover the wet sand with a thickness of 3 cm and put the cuttings on top. Near the lower limit of the frozen layer, about 15 cm thick sand is covered, and as the temperature drops, sand is gradually added to the thickness of the permafrost, and a layer of heat-insulating straw can be covered. A straw handle was erected every 1 meter in Shagougou, which has facilitated ventilation and prevented stifling.

When choosing Shazanggou, two kinds of places should not be selected. First, the sunny place, due to the irradiation of sunlight, is bound to form a large temperature difference, is not conducive to storage; the second is the wet place, the general high temperature in the wet winter, the soil moisture is easy to cause the cuttings Rotting or cuttings germinate during storage.

The timing of the sand trap also plays a key role in the quality of the sand cuttings. The timing of the sand traps is easy to choose in the light of snow conditions in late November, that is, before the soil is frozen and the weather is not raining. If the rainfall in the sand is too early, the excessive moisture in the sand trap will cause the cuttings to become too wet and prone to boring. At the same time under high temperature conditions (4-5°C), the cuttings will also germinate earlier and affect the sand collection effect.

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