Citrus trees wintering cold nine measures
The temperatures in winter and spring are low, and young citrus trees are prone to frost damage. Light flower buds are frostbite, stems are drained dry, and fallen leaves are severe. The yield and quality of fruit trees are severely reduced. In severe cases, there will be freeze-cracking of branches and dried cortex, and even the phenomenon of whole-plant freezing and freezing. Now the following effective antifreeze measures are introduced. .
Covering straw, weeds, leaves, etc., between orchards in the orchard cover the ground, while maintaining and increasing the temperature of the ground.
Antifreeze and freezing water 7 to 10 days before freezing, the orange tree irrigation, water storage, lower temperature, so that the ground temperature during the freezing period remained relatively stable, thereby reducing the freezing injury. The irrigation is preferably performed at noon and it is appropriate to infiltrate in the evening.
In combination with fertilization and one-time earthing before the frost is applied in time, it is possible to effectively avoid freezing damage to the root and the stem, and it is better to use turf soil or soil for compost. Each soil depends on the size of the crown. Earthworms should be pounded to the upper part of the root neck, usually about 15 cm. If it is covered with a plastic film, the film is compacted with soil compaction to prevent heat loss and wind blowing. After the low temperature, the soil above the root neck should be promptly opened in order to prevent rot roots and diseases and insect pests.
When the tree body is covered with low temperature, the main trunk is tightly wrapped with rice straw, which can effectively prevent cold currents from invading.
Protecting the canopy and removing accumulated frost After the “big snowfallâ€, fruit trees are often piled with accumulated frost, which not only breaks down the fruit trees, but also causes freezing damage. Therefore, the accumulation of frost on the branches should be promptly cleared. If conditional, cover the orange orchard canopy with bags, straw, etc.
When the trunk is coated with white orchards in the winter garden, the main branch of the fruit trees is painted white. The formulation of the whitening agent is: 2.5 kg of quicklime, 0.75 kg of sulfur powder, 1.25 kg of salt, 0.1 kg of vegetable oil, 0.05 kg of bean flour, and 18 kg of water. During the preparation, quicklime and salt are separately dissolved in water, fully stirred into a paste, then added with sulfur powder, vegetable oil, and bean flour, and then the water is used to separate and stir.
Cut off the late autumn tip, the late autumn tip leaf is thin and light, organic matter is less accumulated, and the nutrient concentration of the cell fluid is low, and it is prone to frost damage and defoliation.
Spraying Hormone and Oil Lodging Antifreeze In mid-December, spray 80 times oil oil emulsion before the cold wave arrives. Small citrus trees may be properly diluted to prevent phytotoxicity. Naphthalene acetic acid solution spraying in early spring can delay the flowering period of fruit trees, so that fruit trees avoid the harm of early spring low temperature. The concentration of 10ppm is appropriate, first dissolved with warm water, and then use a sufficient amount of water and mix thoroughly.
Smoke and anti-freeze fuel is better to use sawdust and weeds to mix the soil. When the cold wave approaches, it will ignite and let the smoke envelope the park. In addition, set up a windbreak to create a windbreak. In the setting of windbreaks around the orange orchard, it is also possible to plant bamboo groves around the park to reduce the wind speed so as to achieve the effect of preventing cold. Http://Content/9491ed19-5b75-4dc7-899c-1db225013214?cType=2
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