Overwintering of Greenhouse Vegetables

Greenhouse vegetables in the wintering period, a variety of disastrous weather, adverse climatic conditions have a great impact on greenhouse vegetable production, so in this period must strengthen the field management of the greenhouse.

Heating and heat preservation measures: for the shed room with less covering grass curtain, thinner back wall and poor heat preservation, the bedding thickness of the grass curtain should be increased, double-layer curtain should be used as far as possible, and rain-proof snow plastic film should be added to the grass curtain to keep the grass curtain dry. If the temperature in the greenhouse is lower than 6 ℃, it should be heated by burning the stove. Cucumber, tomato, fruit and vegetable are mainly used to protect roots, seedlings and live.

Pay attention to the management of disastrous weather: the management of even cloudy days. In a cloudy day, as long as the temperature is not very low, the grass curtain must be opened. If the sun is exposed for a short time, the temperature in the shed will rise. A reflective curtain is hung on the back wall of the greenhouse, which will also play a role in enhancing light and warming on cloudy days. Keep the room temperature not lower than 10 ℃ at night, strive to store more heat in the back wall on sunny days, control the temperature at 25 ℃-28 ℃ during the day, and prevent wind in time when it is higher than 30 ℃. When there are more cloudy days in winter, plastic film should be covered early, which can increase the ground temperature and reduce the occurrence of low temperature freezing injury.

Snow tianqi111 management. When it snows during the day, you must roll up the grass curtain. Immediately after the snow stops, clean the snow on the greenhouse film. For the parts that are difficult to clean on the middle slope of the greenhouse, gently scrape down with a smooth wooden stick, and try not to cut the greenhouse film. Snow falls at night, more attention should be paid to timely removal of snow on the grass curtain. The grass curtain should be wrapped with plastic film in advance to prevent the grass curtain from absorbing water, causing the shed body to be overburdened and the arch frame to twist or even collapse.

Gale weather management. When the greenhouse film bulges, it is necessary to immediately tie the film line or lower part of the grass curtain and press it on the middle of the front roof of the greenhouse. In case of strong wind at night, it is best to cover a layer of grass curtain on the front foot of the greenhouse and press it firmly with stones.