During the wintering period, there are many kinds of severe weather in the greenhouse vegetables. Unfavorable climatic conditions have a great impact on the greenhouse vegetable production. Therefore, the field management of the solar greenhouse must be strengthened during this period.

Temperature increase and insulation measures

For sheds with less straw curtains, thinner back walls and poor heat preservation, increase the thickness of the straw curtains, use double curtains as much as possible, and cover the rain curtains with rain-proof plastic film to keep the curtains dry. If the temperature in the greenhouse is lower than 6 °C, it should be heated by burning the stove; cucumbers, tomatoes and other fruits and vegetables should be preserved, preserved and preserved.

Pay attention to severe weather management

Even cloudy management: If you encounter a cloudy day, as long as the temperature is not very low, you should uncover the straw curtain. If there is a short time to expose the sun, the temperature in the greenhouse will rise. The reflective screen is hung on the back wall of the shed, and it also plays a role of adding light and warming on cloudy days. Keep the room temperature at least 10 °C at night, and strive to store more heat after the sunny day. The temperature during the day is controlled at 25 °C ~ 28 °C. If it is greater than 30 °C, it should be timely windproof. When there are many cloudy days in winter, the mulch film should be covered early, which can increase the ground temperature and reduce the occurrence of low temperature freezing damage.

Management after a long time of yin and yin: After a long period of cloudy and foggy weather, once sunny, the transpiration of vegetables will be strengthened, and the roots will not be able to catch up. After a sunny day, there will be a large number of dead seedlings. First, we must pay attention to cover the straw curtains to prevent flashing seedlings. After the weather turns fine, the temperature will rise rapidly, and the seedlings will be sharply wilted. At about 10:00 am, attention should be paid to the changes of the seedlings. Measures such as covering the straw curtains properly and spraying the water into the shed (or foliar fertilizer) are taken. Secondly, after the sunny day, watering should be done as little as possible, and the roots must be rejuvenated and then watered, otherwise it will easily cause dead roots. If you need to water and top dressing, you should pour small water and apply instant fertilizer with water. The concentration should be small. After the last sunny day, roots were sprayed with root-promoting agents, and multi-element micro-fertilizers were sprayed on the leaves to make up for the lack of root absorption.

Snowfall management

During the daytime snowfall, the straw curtain must be rolled up. After the snow stops, the snow on the shed film is cleaned immediately. The part of the greenhouse where the slope is difficult to clean is gently scraped down with a smooth wooden stick, so as not to scratch the shed film. Snowfall at night, it is necessary to pay attention to timely clearing the snow on the straw curtain. The straw curtain should be wrapped with plastic film in advance to prevent the straw curtain from absorbing water, causing the shed body to be overburdened and the arch frame to be distorted or even collapsed.

Management of windy weather

When the shed film has a bulging phenomenon, immediately press the film line or put down some of the straw curtains in the middle of the front roof of the greenhouse. When there is a strong wind at night, it is best to cover the ground with a straw curtain at the front of the greenhouse and then press it with stones.

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