Strawberry clever management under foggy weather

Recently, the hazy days in the central and eastern regions have reoccurred and continued for about a week, which has caused some impact on the strawberries grown in greenhouses. Facility managers should do manual lighting and heating to reduce the effects of overcast weather.

According to the monitoring of the Central Meteorological Observatory, since December 20th, there have been spasms in central and southern parts of North China, Huanghuai, Jianghuai, northern and western Jiangnan, and most parts of South China; as of the day before yesterday (December 27th), the number of days has generally been 1 to 3 days. Among them, in Jiangsu, Zhejiang, southern Hunan, Guangxi, and Guangdong, there are 4 to 6 days and 7 to 8 days in some places, and in major cities, there are 2 days in Beijing, 2 days in Shanghai, and 7 days in Nanjing, Jiangsu. Nanning, Guangxi, 6 days. Experts said that “the general circulation situation will be adjusted from January 1 to January 3 next year. As the cold air forces begin to increase, haze weather is expected to improve gradually after New Year's Day.”

When fog weather occurs in winter, the sunlight in greenhouses is less than 1/5 of that in sunny days, the relative humidity of air is above 95%, and the indoor temperature is below 15°C. Bad weather not only limits the photosynthesis of strawberry leaves in greenhouses, but also reduces photosynthate production and delays ripening of strawberries. For example, during a few days of foggy days during the flowering period of strawberries, the fruit setting rate will be greatly reduced, resulting in malformed fruit, resulting in a decline in yield. Deteriorating.

It is suggested that the facility's agricultural managers should strengthen the management of greenhouses during the fog weather from the following points: First, increase artificial auxiliary lighting. Incandescent lamps can be used as a light source for heat treatment, and 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. In the strawberry flowering period, the stocking bees assist in pollination, pollinating the bees, and timely spraying the fruits during the fruiting and fruit setting period of the strawberry to enhance the pollen fertilization quality, and the cycle fruit setting rate is strong to promote fruit development without deformity, without shells, and without defects. Granules, good uniformity, improved quality, and high yields of vegetables and fruits. At the same time with the new high-fat film spraying 800 times liquid film bagging role, will not affect the fruit breath, prevent fruit rust, anti-crack fruit, improve the fruit surface coloring and brightness, reduce residual toxicity and improve quality.

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