In winter, the weather is cold and the light is weak. How to manage greenhouse vegetables?

Vegetable greenhouse planting in winter, in order to reduce the impact of insufficient sunshine in winter, greenhouse vegetable farmers should make full use of the sunshine time of the sun every day, open the shed cover, and let vegetables absorb the sunlight to the maximum extent. Second, light can be used instead to meet the normal growth needs of vegetables.

You can get more light; When the vegetable field is ridged, there are ditches between the ridges, which are generally about 15-20cm higher than those in the ditches. In this way, of course, in winter, the sun shines on the ridge and gets more light. What we can do is ridging, sowing seedlings and growing vegetables on the ridge. In winter, the sun shines for a short time during the day and the weather is short, but it is cold at night, so it is necessary to keep the greenhouse temperature not too low. The best way now is to raise the temperature of the greenhouse and install some heating bulbs to improve the illumination of the greenhouse.

In the greenhouse, the sun shines on the shed surface in the morning, removing the snow, uncovering the carpet, covering the carpet in the afternoon, hanging reflective curtains on the back wall and adding electric lights, which basically solves the problem of weak light. In the case of sufficient base fertilizer and good soil moisture, water topdressing should be done as little as possible in autumn and winter to maintain the ground temperature and air humidity and promote the normal physiological growth of vegetables. You can't open the tuyere in rainy days to prevent rainwater from dripping into the shed and increase the humidity in the shed again. As far as temperature is concerned, put the quilt away early at night and put it away the next morning and evening.

Usually the east-west direction is in the sunlight greenhouse flush with the ground. Crops in the south are densely planted, while crops in the north are sparsely planted. The border should be low in the south and high in the north; In the middle and late stage of plant growth, there are many leaves, so the old, weak and diseased leaves at the lower part should be removed in time, which is beneficial to soil illumination and better crop growth. Putting a small wind for a long time can reduce the humidity in the shed. You can also spread a plastic film and water it under the film to prevent a large amount of water from evaporating. Rice husk or broken straw can also be spread between rows, which can not only keep the ground temperature, but also absorb the water in the shed.