Nowadays, more and more peasant households are using roller shutters in winter sheds, and the coverage or increase or decrease of grasshoppers is large. When the number of personnel is small, it will bring certain difficulties to the management of winter sheds. According to the changes in the outside temperature, proper opening and closing of ventilation openings, uncovering grasshoppers, and rainproof membranes are the key to regulating the growth and development of shed vegetables. In the early spring, the atmosphere is changeable. Even if it is troublesome, adjust the covering timely.
When the outside temperature is above 0°C in the sunny morning, do not cover the rainproof film; if the outside minimum temperature is 3°C-5°C, close the vent at the temperature of 25°C in the afternoon shed and drop it to 20°C in the evening shed. At the time of the embarrassment, a 8-10 cm wide ventilation opening is again pulled out on the roof to allow a gradual drop in the room temperature and maintain the room temperature at around 10°C in the morning.
The coverage of rainproof film should be controlled flexibly. If there is a low temperature of -5°C outside, the rainproof film should be covered forward and the front edge of the shed tightly closed to prevent cold air from entering. If it rains but the weather is not cold, it should be rainproof. The membrane should be covered upwards to protect the grasshoppers. If it is cloudy weather, or in case of light rain, light snow, or foggy weather, we must promptly uncover the haystacks, cover them as early as possible, or uncover the grass weeds and then cover the rainproof membrane over the roof. The grasshopper can also prevent the temperature in the shed from falling, and it can make the shed vegetables see the scattered light, which can play a multi-purpose effect.
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