Dongzao Kaijiao, which is a circular peeling of the trunk of winter jujube, also known as "A tree." Because it prevents the organic nutrients produced by the leaves from being transported to the roots, it can relatively increase the nutrient supply of flowers and fruits, and has a very significant effect on improving the fruit setting rate and quality. It is an important measure to realize the early high yield of winter jujube. To open the winter jujube, it is necessary to pay attention to the time of opening the armor and master the method of opening the armor. Otherwise, the purpose of opening the armor cannot be achieved, and the growth of the jujube tree will be adversely affected.
First, open time. The first flower of each inflorescence of Dongzao jujube is of the best quality, so it is necessary to choose to open it in the early stage of full bloom, that is, most of the fruiting branches of the whole tree have opened 4-6 flowers, and most of the inflorescence's head spray will be opened soon. From the perspective of age, the age of the open armor should not be too early, otherwise it will affect the growth and development of the tree. When the tree height reaches 3 meters or more, the dry diameter reaches 3-5 centimeters or more, the crown diameter reaches 2 meters or more, and when the result of the whole tree is more than two years, the number of branches reaches 300 or so.
Second, open A technology. The armor is usually carried out on the trunk. Just start to open at 25 cm from the ground, then move 3-5 centimeters each year until close to the first main branch, and then open it from bottom to top. In recent years, there are also jujube farmers who have moved their armor sites appropriately and have preserved one or two auxiliary branches below the mouth to maintain the growth and development of the root system during the armor. This method is also worth learning from.
When the armor is opened, the old bark is scraped off to expose the bast tissue. The armored knife is used to cut the upper armor width and cut it carefully for about two weeks. A mouth should be closed into a ring. Then, remove the severed bast tissue, taking care not to injure the xylem. The wound is required to be smooth, the upper edge should be straight, and the lower edge should be inclined outwards to prevent accumulation of rainwater. The phloem at both ends of the wound is still close to the xylem and does not grow. The armor width is generally 5-8 mm, the healing period is 35-40 days, and the saplings and the weaker tree vigor may be narrower.
Third, after the opening of the management. After 3-5 days of armoring, the wound was coated with a protective agent. The use of methamidophos EC 50-100 times liquid agent to wet the wound for the degree, after every 5-7 days 1 times, usually 2-3 times. After 15-20 days of opening, if the tree vigor is still prosperous, it can be cut once with a knife in the original wound, further delaying the healing period. After 25 days of armoring, the wound can be smeared and moistened with plastic strips for several days to promote healing. After a few days, the dressing is removed.
After the winter jujube has been opened, if the mouth is too wide, or if it encounters drought, pests and diseases, etc., so that the wound can not heal, the following measures can be taken to remedy:
1. A port bridging: take the sap or the first or second year branches below the victim's larvae and perform single or double bridging. After bridging survival, it can be rejuvenated in 2-3 years. The bridging time is preferably in the bud or vegetative stage.
2. A mouth burying: If the wound is very close to the ground, it should be promptly cleaned up and disinfected, sealed with wet soil, promote the healing of a mouth and germinate adventitious roots.
3, a mouth to re-healing: the width of a normal open, but due to pests and diseases can not heal, it is necessary to clean up, break up and disinfection. Seal the moisturizer with a plastic strip to promote healing. This is a simple and effective remedy. It usually re-healed in 1-2 months.
4. Smear healing agent: Use 1 stick (10 ml) of healing agent, apply 10 times to water and apply it to the mouth to moisten it. If you seal and moisturize once again by re-invasive healing, your mouth will heal faster.
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