The winter jujube is opened, that is, the trunk of the winter jujube is peeled off, also called "a tree". Since the opening of the armor prevents the organic nutrients produced by the leaves from being transported to the roots, the nutrient supply of flowers and fruits can be relatively increased, and the fruit setting rate and quality are obviously improved, which is an important measure for realizing the early high yield of winter jujube. For the winter jujube to open the armor, pay attention to the time of armor, master the method of armor, otherwise, the purpose of armor is not achieved, and the growth of jujube trees will have adverse effects.
First, open time. The first flower of each inflorescence of winter jujube has the best quality, so it is necessary to choose to open the armor in the early stage of full bloom, that is, most of the fruit branches of the whole tree have 4-6 flowers, and most of the inflorescences are about to open when the head spray is about to open. From the perspective of tree age, the age of the 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 cm 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 technology. Open armor is usually carried out on the trunk. At the beginning, the armor was opened at a distance of 25 cm from the ground, and then moved up to 3-5 cm every year until the first main branch was approached, and then the armor was opened from the bottom to the top. In recent years, there are also jujube farmers who will move up the armored parts properly and keep 1-2 auxiliary branches below the mouth of the mouth, thus maintaining the growth and development of the roots during the period of the armor. This method is also worth learning.
When opening the armor, first scrape the old bark to reveal the phloem tissue. Use the armor knife to cut the width of the armor and cut it carefully for two weeks. The mouth of the mouth should be closed into a ring shape. Then, remove the cut phloem tissue, taking care not to damage the xylem. The wound is required to be smooth, the upper edge is straight, and the lower edge is inclined outward to prevent accumulation of rain. The phloem at the ends of the wound should still be close to the xylem, and it should not be tilted. The width of the armor is generally 5-8 mm, and the healing period is 35-40 days. The saplings and the weaker trees may be narrower.
Third, the management after the opening of the armor. 3-5 days after the nail is opened, the wound is coated with protection. The drug uses methamidophos EC 50-100 times solution to wet the wound, and then apply the drug once every 5-7 days, usually 2-3 times. Open for 15-20 days, if the tree is still too strong, you can cut the original wound with a sharp knife once, further delay the healing period. After 25 days of armoring, the wound can be plastered and wrapped with plastic strips for a few days to promote healing. After a few days, the dressing is removed.
After the winter jujube is opened, if the mouth is too wide, or if it encounters drought, pests, etc., so that the wound can not heal, the following measures can be taken to remedy:
1. A bridge of the mouth: Take the sprouting or one or two-year-old branches below the mouth of the victim tree for single or double-headed bridge. After bridging, you can rejuvenate in 2-3 years. The bridging time is preferably in the germination or vegetative growth phase.
2, A mouth embedding: If the wound is close to the ground, it should be cleaned and disinfected in time, buried with wet soil, promote healing of the mouth and germination of adventitious roots.
3, A mouth re-created healing: the width of the open armor is normal, but due to pests and diseases can not heal, it should be cleaned, broken and disinfected in time. Seal with a plastic strip to promote healing. This is a simple and effective remedy. It usually heals again in 1-2 months.
4, coated healing agent: use a healing agent 1 (10 ml), 10 times the water, coated on the mouth of the mouth to make it moist.
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