I. Strengthening temperature protection
In order to avoid the freezing of large shed vegetables, wind and cold, multiple-cover farming techniques are commonly used in production. That is, covering the membranes on the ground; covering the membranes with straw curtains in place of the membranes in place of the membranes would have a better temperature protection; and covering the membranes with a plastic membranes at night and on rainy days would have prevented the rain from getting wet. This increases the temperature by 3 to 5°c with a good temperature protection effect. In case of wind, the vents should be closed, the membranes should be pressed, the grass should be covered and the wind drums should be prevented. In case of severe cooling, temporary warming or temperature protection measures are taken。
Ii. Water water
The temperature and temperature in the winter shed are low, and the water should be poured with small sub-film water, both to meet the water requirements of the vegetables and not to unduly reduce the soil temperature. Water should be watered in the clear morning, before cold air arrives and in the dark, rain and snow. The use of drip irrigation is better if conditions permit。
3. The management of even uncool weather encounters continuous shades, rain and snow. The following should be noted: on the one hand, it is important to remember that the curtains cannot be covered on a daily basis or that the temperature is protected, leaving the vegetables in a dark environment, allowing the vegetables to receive scattered light for three to five hours before or after noon. On the other hand, it is not possible to spray a pesticide with a water agent in the midst of the vagina and increase indoor air temperature. Third, for vegetables that are already in the flowering season, early harvest of commodity fruits and appropriate berries are required。
4. The improvement of indoor light conditions should begin, without affecting the temperature in the shed, with the straw curtains being lifted as early as possible and later in order to extend the light time for vegetables. At the same time, there is a need to remove the dust and snow from the surface of the shantymen and to keep them clean and transparent and to increase their perceivability. In addition, a mirror can be mounted within the northern wall of the greenhouse, with conditions。
