Protected cultivation of strawberry, winter and spring will often encounter severe wind, heavy snow, heavy fog and other bad weather, although the frequency of these weather is very low, but once encountered, if not timely measures, strawberry production will suffer serious losses, will now The management experience in production is described as follows:
Windy day management
In case of strong winds in greenhouses, the shed film will bulge from the wind and beat up and down. If it is not managed in time, the shed film will be blown and the strawberries in the shed will suffer freezing damage.
Management measures: Block all air vents tightly to prevent the wind from blowing into the shed to harm the strawberry plants and damage the film. Press the film and tighten, if necessary, put down some grasshoppers to hold the film firmly. If the wind blows at night, it is better to use a woven bag half a bag of soil to press on some grasshoppers to prevent the wind from scraping the grasshoppers.
Snow days management
Snowfall in early spring, the outside temperature is not very low, may melt while snowfall, weeding grasshoppers, which not only affect the insulation, grasshopper rolling is also difficult, but also easy to pressure scaffolding. Therefore, we should take measures to clear the grass before the snowfall, clear the snow after the snow stopped, and then lay down the grass. Blizzard weather, the outside temperature is too low to open the grass, otherwise it will freeze the strawberries in the shed.
Management measures: heavy snow pressure on the grasshoppers, it is easy to suppress the scaffolding, the snow on the grasshoppers must be cleared in time, and the snow next to the scaffolding wall must be cleared to prevent the snow from melting through the soil into the shed, not only Take heat and damage the wall. Clean the snow on the film during the day to enhance the transparency of the shelter. In order to increase temperature and prevent freezing, a small arch canopy can be buckled in the shed to improve lighting. During the day, attention should be paid to exposing the grass mulberry in the daytime. However, care must be taken not to remove it once and prevent it from becoming overheated after the snowfall, resulting in a permanent wilting caused by severe water loss in the strawberries. . Fog Management
The fog weather often occurs in spring. In this weather, the sunlight in the greenhouse is less than 1/5 of that in sunny days, the relative humidity of the air is above 95%, and the indoor temperature is below 15°C. Such bad weather not only limits the photosynthesis of strawberry leaves, reduces photosynthetic products, and delays ripening of strawberries. For example, a few days of foggy days during the flowering period of strawberries will greatly reduce the fruit setting rate of strawberries and cause malformed fruit, leading to a decline in yield. Poor quality.
Management measures: First, increase artificial auxiliary lighting. An incandescent lamp can be used as a light source for heat treatment. Each 100 watt lamp is about 7.5 square meters, and is heated for 5 to 6 hours every day from 5 to 10 in the afternoon. The strawberry can increase production by 30% to 50%, and the deformed fruit can be reduced by 50%. The second is a reasonable temperature control. Temporary heating equipment is installed, heating is generally performed at night, and ventilation is performed for short periods of time before and after noon. The daytime temperature in the control booth is about 20°C and the nighttime temperature is above 10°C. The third is auxiliary pollination. During the strawberry flowering period, the stocking bees assisted in pollination and pollination by the bees can increase the fruit setting rate by 50% to 70%, significantly increasing the yield and quality of the strawberries, and increasing the economic benefits.
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