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About the Major Technical Measures to Make Citrus Cold and Frost Resistant
1. Shake off the canopy of the snow: Citrus leaves are dense and evergreen in the four seasons. When snow falls, the snow will crush the branches and destroy the crown. To shake off the snow on the trees in time, but not to shoot branches and leaves, when the appearance of ice, but also promptly ruled out. 2. Earth warming: The soil protects the root neck, and the amount of earth is not exposed in the root system, covering the root neck as a standard, reducing ice damage, and plowing in the spring. 3, branches painted white, dressing and canopy cover: trunk, main branch of the tree skeleton, vulnerable to freezing damage, leading to weakening of the tree, severe cortical dehiscence, the whole plant died. Whitening agent is usually used lime 10 kg, sulfur powder 1 kg, salt 0.2 kg, a little cooking oil, add water 30-40 kg adjustment made. The trunk is covered with straw or mud, and the anti-freezing effect is better. When dressing, pay attention to the grass pressing on the grass tail and tightening it so as not to freeze the water in the grass. 4, smoke smoke: The main is to prevent thick frost after freezing, reduce radiation heat, reduce frost. Smoked smoke materials can be obtained locally, such as weeds, foliage, etc., 4-6 piles per mu. Frost usually occurs in the early morning and should be controlled before the critical temperature of freezing. 5, spray steam insulation agent: Insulator, can form a layer of molecular film on the foliage, inhibit water evaporation, reduce leaf cell dehydration, play antifreeze effect. 6, post-freeze management measures: First, slightly frozen, leaf curling, yellow leaves, weak growth, can be applied immediately 2-3 times foliar, with 0.2% urea + 0.2% potash or 0.2% high grade dihydrogen phosphate Potassium, early spring, early spring fertilizer. The second is to deal with the canopy according to the principles of “slaughter on small injuries, pruning on the wounds, and sawing on the big woundsâ€; the third is to strengthen the cultivating soil, increase fertilization, prevent flooding, prevent drought and pest control, and restore the tree vigor as soon as possible. Prevention of post-freezing fluid gum disease.