At present, there are continuous cooling and snowfall conditions across the province, and management should be strengthened to take effective measures to maintain the normal physiological metabolism of citrus tea and other economic crops, and strive to resist harvesting and increase the economic benefits of fruit tea. 1, roots earth. Root can be used to protect the citrus, tea tree roots and root neck safety winter, soil thickness requirements to reach 30cm-50cm, width and diameter of 2m, use soft and moist soil, avoid using large pieces of soil or tapping too tight. The earth should be used in the soil or in the soil in the trench wall. The soil must not be taken in the nearest place to prevent the root system from being exposed to increase the frost damage. 2, trunk white. The oranges were brewed with 1 kg of lime, 8 kg of water, and sulfur iodide, salt, and grease to prepare a whitening agent and evenly brushed the trunk surface. 5, between the rows of grass. Local materials can be used to cover tea tree rows and roots with shrubs, rice straw, straw, etc. to help increase soil temperature, maintain soil moisture, prevent tea plants from freezing, and have a significant effect in inhibiting weed regeneration and increasing soil organic matter. General acres cover about 1000 kg. 1, actively protect the leaves. Victim-tolerant trees tend to have a large amount of defoliation or leaf rolling after freezing. After the temperature rises, the application of 0.3%-0.5% urea on the foliar surface is continued for 2-3 times, and leaves that cannot be recovered are promptly removed. 3. Strengthen soil management and enhance root absorption. After the spring temperature rises (early March), we must promptly open up the rammed soil; pay attention to drainage, timely cultivating and weeding, improve the soil permeability, and increase soil temperature to promote root activity. Green Acrylic Tape,Strong Acrylic Tape,Acrylic Mounting Tape,Vhb Acrylic Foam Tape Kunshan Jieyudeng Intelligent Technology Co., Ltd. , https://www.jerrytapes.com
First, emergency cold and frost protection measures
3, shake the snow. In the snow, especially when it is snowing at night, personnel should be organized to shake the snow in time to avoid excessive snowfall on the tree canopy and breakage of the branches. In case of no wind, clear night will cause a sharp drop in temperature, resulting in frozen leaves, should be organized in order to shake the snow in order to improve the micro-climate crown climate, reduce frost damage.
4, smoke smoke. Before the occurrence of critical low temperature (generally at 2-3 o'clock in the morning after snow), fuming smoke can achieve better antifreeze effect.
Smoke antifreeze method: 1 smoke material: litter, weeds, sawdust, clam shell, turf and so on. 2 stacking distance: grasp the wind direction, downwind every 50-80 meters to lay a line, stacking 2-3 meters, about 2-3 heap per acre.
Smoke prevention and freezing precautions: First, smoke the surface of the smoke stack when wet, so that the smoke is saturated with water vapor release; the second is to smoke on a clear and windless night to be effective.
Second, strengthen post-freezing management
After the citrus and tea trees have suffered freezing damage, they must actively take effective measures in accordance with the extent of the damage and quickly restore their tree vigor to facilitate the resumption of production as soon as possible.
2, timely pruning, cut dry. Before germination, pruning is performed in time according to the degree of damage of the tree body to promote new shoots and restore the tree vigor.
4, increase fertilizer material. After the tree is frozen, it will lose a lot of nutrients and weaken the tree vigor. In order to restore the tree vigor as soon as possible, nitrogen fertilizer must be added to supplement the nutrients. Soil fertilization can be applied thinly, while spraying 0.5% urea plus 0.2% potassium dihydrogen phosphate for extra-root dressing can have a significant effect on restoring tree vigor.
5, prevention and control of pests and diseases. After the freeze, the tree vigor is weak and the wounds are increased. The resistance to pests and diseases is relatively weakened, and various pests and diseases are prone to occur. Therefore, timely removal of dead branches, frostbite, pest control, in order to maintain a robust tree.
Cold rain and snow weather