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Southern Garden Plant Frost Damage and Prevention
China has a vast area, and the natural conditions vary greatly between regions. Although the climate conditions in the south are relatively superior, due to the invasion of winter and early spring cold waves, garden plants are often exposed to frost damage. In early spring, the buds and tender shoots become brown after the buds are sprouted. The scales are loose and wilted on the branches; the flowers are frozen and the petals are frozen and become dry and fall off; After the plants were frosted, the light ones were damaged and the ornamental effect was affected. In the worst case, the whole plant died. In landscaping, the following anti-frost measures must be taken for garden plants. 1. Adhere to the principle of appropriate trees, planting plants with strong frost resistance. 2. Strengthen cultivation and management measures to improve plant resistance. Such as strengthening the management of soil and fertigation, using good fertigation, irrigation and drainage technology, promote plant growth, increase nutrient accumulation, ensure that the plants are robust and grow well. Which should pay attention to foliar dressing, increase the concentration of cell fluids, thereby enhancing the resilience of frost. 3. According to meteorological department forecasts, grasp the timing of prevention and control, and take corresponding measures to improve the microclimate environment of the plant. Specific methods: (1) Spraying wet water During the frosty period, the vulnerable plants are sprayed at night or at dawn. If seedlings or potted plants, the soil in the seedlings or pots should be sprayed (poured) to increase the air humidity in the surface layer, reduce the loss of radiant heat on the ground, and prevent the occurrence of frost damage. (2) Coverage and Coverage Measures It is simple and effective for garden plants to prevent frost damage. When covered, the plants with a certain pressure can cover the coverings directly. On the contrary, they should be covered with supports. Covers generally choose plastic film, straw mats or used sacks. (3) For scaffolding trees that need to be protected against frost, if trees are too tall, such as eucalyptus, astragalus, etc., they should be covered with scaffolds. When scaffolding, the size of the scaffolding is determined by the tree body. It is not only compact, but also has to stretch the branches as far as possible without stress. At the same time, it must pay attention to its stability. Scaffolds can be made of bamboo or wood as supporting materials, and metal, straw mats, plastic films or encrypted shading meshes can be used as covering materials when conditions permit. (4) Wrap in the season when frost occurs. Dry stems of plants (mainly Qiao irrigation and flowering trees) can be wrapped to protect stems of plants and prevent them from being directly frozen and endangering the whole plant. Wraps can be made of straw ropes, sacks, or used cotton cloth. (5) The whitening of the trunk by whitening can not only prevent and treat diseases and insect pests and sunburn, but also can protect the tree body and prevent frost damage. When the tree trunk is coated with white anti-frost, the preparation of the white coating agent is slightly thicker than conventional whitening, or more when brushing, ie, the second coating is used. In addition, we must do after the frost management work: Strengthen soil fertilizer management and restore plant growth as soon as possible. 2. Prune the frosted shoots. 3. If the death of the whole plant should be replanted as needed. (Source: China Flower Network Cai Lianping)