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2, in view of the current weather of freezing rain, it should pay attention to timely heating and fill light. For tropical flower and seedlings grown in tropical and subtropical regions, the temperature should be maintained above 12°C. Other flowers and seedlings should be kept at about 8°C, and the lowest should not be less than 5°C. Light should be given in time, and the light intensity should be maintained at 20,000. Lux around, and control the lighting time according to the growth characteristics.
3. Clean the snow and frost on the top of the shed in time to reinforce the support and prevent the collapse of the shed.
4, no conditions into the shed, and timely use of plastic film or straw, chaff, etc. to cover the insulation.
5. It is necessary to strengthen field management and timely drainage.
6, to promptly remove the frost on the plants (softly shake, lightly knocked down with a soft bamboo, but can not be beaten branches and leaves), and carry out earth cultivation.
After suffering freezing injury, it is necessary to take remedial measures in time to reduce the damage caused by freezing and restore vigor as soon as possible.
1, pruning. Trimming is one of the commonly used remediation measures after frost damage. Treated according to the degree of damage to the plants: For the plants with lighter freezing damage, strictly control the “Ning shallow not deep†light pruning to clear the plants, in order to facilitate bud germination. Heavier victims should be deeply trimmed or heavy trimmed. Timely cut off the frozen parts to promote new shoots germination.
2, shallow tillage fertilization. After thawing, shallow cultivating grass in early spring, combined with topdressing available nitrogen fertilizer, and appropriate application of phosphorus and potassium fertilizer, make the plant quickly restore vitality, improve plant resistance to cold and lodging, promote bud germination and new shoot growth. If the permafrost depth is deep, extra-root fertilizer may also be applied with 1% urea + 0.2% potassium dihydrogen phosphate. Freeze injury brings some wounds to the plants. Shallow plough fertilization should be carried out in time.
Flower seedlings antifreeze disaster relief technology
1. In breeding seedlings, potted flowers, and some annual flowers, precious flowers and green seedlings, all those who can enter the shed should do a good job of entering the shed for insulation work, and timely cover the shed film to prevent the intrusion of cold air.