Flower seedlings anti-freeze antifreeze technical measures

First, greenhouse management. We must do a good job in shed reinforcement and snow clearance. Clear snow on the roof, increase the light transmission, effectively prevent the snow from crushing the greenhouse, and at the same time reduce the freezing temperature after the snow melts. When clearing the snow, you should push it lightly to avoid puncturing the shed and transporting the snow under it to the nursery. For the collapsed, collapsed and deformed greenhouses, they should be immediately reinforced and repaired. If they cannot be repaired, they should be promptly transferred to the shed or covered with film, straw or shade nets to improve the insulation effect; antifreeze after snow should be done well. . Cold weather will appear after the snow, in the various types of greenhouses should be added inside the greenhouse film to form a two-layer insulation film inside and outside, where conditions should be heated in the shed.
Second, open flowers and trees management. After the snow, the staff should be organized to shake the snow on the flowers and trees. When the snow is shaken, the branches should be hooked firmly. First gently shake and gradually increase, and the snow on the leaves can be shaken. After the snow melts, it is necessary to strengthen the roots and increase the ground temperature. In areas where conditions permit, measures such as covering, sowing, and smoking can be taken to reduce freezing damage. At the same time, we should also do a clean ditch drainage around the nursery to reduce the soil moisture in the field, to avoid pool snow, prevent frost damage and waterlogging at the same time, frostbite roots. For the seedlings and ground cover plants, measures should be taken to cover the straw, sunshade nets and other measures to prevent freezing damage.
Third, recovery measures after frost damage. Plants should be strengthened after the freezing injury to restore their growth potential.
1, timely drainage after freezing, you can ease the impact of frost damage, reduce losses. After the budding of re-frozen flowers and trees, we must pay more attention to the management of soil moisture. Over-breeding and excessive drought are not conducive to the recovery of plant growth.
2, implementation of earth and inter-row coverage. After snowing, new soil can be added around the plants, and firewood, straw, turf, leaves, sawn ash, barnyardgrass, rice husks and rice straw are used to cover the seedbed before the soil is frozen to increase the heat preservation effect of the soil.
3, according to the degree of frost damage, reasonable treatment of the crown. After freezing, the shoots are still good, but the leaves are withered and should be removed in time. The pruning of freeze-dried shoots should be carried out after germination, leaving a healthy part and cutting off dead parts, pruning should not be premature, otherwise the wound is susceptible to diseases.
4. For lightly-frozen plants, curled leaves, yellow leaves, and debilitating growths, 0.5% urea can be used for extra-root fertilizers 2-3 times. After thawing in early spring, early spring fertilizers are applied to restore their growth potential. . Frost damage heavy plants should be applied more thin fertilizer, in particular, pay attention to control the period of fertilization, in order to promote the spring and summer shoots for the purpose of controlling autumn shoots. In addition, the weak growth of flowers after being chilled often leads to pests and diseases, and must be checked frequently to prevent pests and diseases.

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