If greenhouses and fruits are planted early, they can generally be harvested earlier. However, early planting of fruits and vegetables is often exposed to low-temperature hazards. To prevent cold damage, the following measures can be taken.
1. Grasp the number of safe colonies to avoid freezing damage. The 10 cm deep soil temperature in the shed should be stable at 10°C-12°C, and the minimum temperature in the night shed can be stable above 5°C.
2. Temporary or short-term heating methods can be used for early planting, but also avoid freezing damage and accelerate growth. Such as Beijing, Changchun and other places in the installation of 8 stoves per mu, can be planted about 1 month earlier. In some places, electric heating lines are also installed under the ridges or under the ridges before the cultivation of fruit and vegetables in greenhouses, which also has good results. If there is a risk of freezing during a cold wave invasion in the initial stage of colonization, warming and freezing may be temporarily set in the greenhouse.
3. Strengthen the insulation coverage. Outside the shed, weave grass rakes, set ceilings, buckle small sheds, and mulch in the shed to increase the temperature of the shed by 6°C-8°C.
4. Before the planting of seedlings, low-temperature exercise, increasing the sugar content in the body and reducing the water content can significantly improve the cold-resistance capacity of the crop.
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