What are the latest precautions for girdling winter jujube
Girdling is an important step in the process of growing winter jujube. It can effectively promote fruit set in winter jujube and ensure a high yield, but when girdling, attention must be paid to timing and method, otherwise it will backfire. So what should be noted when girdling winter jujube? Let's learn about it together.
1. Improper girdling time
Many fruit growers pay no attention to tree age, tree vigor or flowering conditions when girdling, and blindly girdling often leads to young trees declining before their time, weak trees becoming even weaker, poor fruit set when girdling at the early flowering stage, and wound infection by pathogens when girdling encounters rain. This not only fails to improve the fruit set rate, but also affects plant growth. Therefore, girdling must vary according to the tree. First, look at tree age: trees are generally girdled at 4-6 years old, and trees under 3 years old should not be girdled. Second, look at tree vigor: girdling is mainly for vigorous plants, and weak trees and weak branches must absolutely not be girdled. Third, look at the flowering stage: girdling time is closely related to flowering time and the quantity and quality of flowering, and it is best to girdle at 40%-60% full bloom. Fourth, look at the weather: try to choose a time when the average daily temperature is 22-26°C and there has been no rainfall for more than 3 consecutive days, so as to avoid wound infection by bacteria.
2. Improper girdling method
If the girdling width is too wide, the wound will not heal for a long time; if it is too narrow, it will heal in less than half a month; and if the girdling is uneven and the phloem is not removed cleanly, the xylem will be damaged. All of these fail to achieve the girdling effect and also have a huge impact on plant growth. Therefore, when girdling, first control the girdling position: when girdling the trunk, start at a position about 20 cm from the ground. Next, control the girdling width: the girdling width is generally one-tenth or one-eighth of the branch diameter. Finally, control the smoothness and depth of the girdling cut: the girdling tool must be sharp, and the girdling depth should reach the xylem but must not injure the xylem. Then remove all the phloem cleanly so that the wound is flat and smooth and the lower edge of the girdling cut is slanted to prevent water accumulation.
3. Improper wound protection
Some fruit growers neglect management after girdling, leaving the wound directly exposed, which makes it vulnerable to pests and diseases; in high temperature, drought and rainy weather, the wound is very likely to rot and necrose. Some fruit growers wrap the wound with plastic film after girdling, causing the wound to heal prematurely and resulting in a large amount of fruit drop. After girdling, the wound should be aired for three days. If it rains, drainage at the girdling cut should be done well to avoid infection by pathogens. After that, spray a disinfecting and sterilizing agent once every week. 15-20 days after girdling, apply gibberellin to the wound and wrap it with plastic film. Young buds sprouting at the wound should be removed in time to reduce nutrient consumption.
The above is an introduction to the precautions for girdling winter jujube. I hope it can help you. To learn more related knowledge, please keep following us.