When the greenhouse is in continuous rainy weather, the farmers can take the following measures to reduce the damage according to their own conditions.

First, the temperature increase measures

　　 1 . Warm up the stove. Several stoves are placed according to the size of the booth, and the heat from the furnace and the chimney is used to increase the temperature of the shed.

　　 2 . Heated by an open flame. The shed is directly ignited with a pile of flammable and less smoked dry wood to increase the temperature of the shed. This method is warmer, but pay attention to the fire should not be too large, the fire should not be too strong, in order to prevent the baking of membranes and vegetables; and to control the burning time, in order to prevent excessive smoke, causing smoke.

　　 3 . Warm the brazier. Place the charcoal or coal brazier in the oven evenly into the shed or move the brazier back and forth to warm up. This method is simple and easy, and it is safer, but the heating effect is limited.

　　 4 . Electric heating: heating by electric furnace, electric heater, electric heating line, etc. This method is fast, non-polluting and easy to control, but the cost is high.

Second, the light increase measures

　　 1 . Keep the transparency of the film; 1 Keep the film surface tight. 2 Keep the membrane surface clean and remove dust and snow from the membrane surface in time. 3 ordinary membranes should eliminate the water droplets in the membrane in time. The common method is to beat the membrane surface to make the water droplets fall; the second is to spray the droplets or anti-fogging agent to the membrane surface regularly.

　　 2 . Use reflected light. 1 The floor covering reflective film can not only increase the light of the lower part of the vegetable, but also maintain the ground temperature and reduce the evaporation of soil moisture and reduce the humidity of the air in the shed. 2 Hang the reflective film on the back wall to increase the northern light intensity. 4 paint the interior wall and the surface of the column in white,

　　 3 . Try to extend the lighting time as much as possible. Under the premise of ensuring the temperature, the grasshopper should be uncovered as soon as possible.

　　 4 . Adopt comprehensive agricultural measures. Elevated vegetables can be planted in wide and narrow rows, and appropriately planted; timely pruning, removing old leaves, and pulling vegetables and stems with transparent rope racks.

　　 5 . Artificial fill light. When the cloudy day and the winter light time are short, the electric light and the fluorescent light are used for artificial light filling, and the electric light and the fluorescent light are installed together, and the number of lights is generally arranged at about 360 watts per 10 square meters . The luminaire should leave the vegetable and shed film 50 cm to avoid damage to the film and film. Fill Time: sunny generally before exposing the sheet and the rear cover thatch complement each 2--3 hours; cloudy even be prolonged, as appropriate, so that the natural light and artificial light is maintained at the addition time of about 12 hours.

Third, reduce air humidity

　　 1 . Ventilation and drainage. Rainy ( snow ) weather should be ventilated and dehumidified when the humidity in the shed is too high. The dehumidification time is better when the humidity in the shed is the highest in the morning or when the external air humidity is minimum before and after noon, and the temperature is high.

　　 2 . Avoid watering on rainy days; watering should be carried out at noon on sunny days.

　　 3 . Rational use of pesticides and foliar fertilizers. Foliar fertilizers and sprayed pesticides should not be used on rainy days. If pesticides are required, aerosols or dusts should be used.

　　 4 . Reduce the amount of water on the membrane surface. The method is as good as maintaining a good transparency of the transparent cover.

　　 5 . Reduce soil moisture evaporation. Covered with a mulch film, grounded with a dry soil, etc.