How to deal with bad weather in greenhouse planting

Abstract: Vegetable greenhouses have gained a lot from planting out-of-season vegetables, which is also the advantage of greenhouse vegetables over in-season vegetables, but similarly, greenhouse construction also needs to deal with all kinds of bad weather different from emergency vegetables, such as snowstorm and frost. So how to deal with the bad weather when planting vegetables in greenhouses? Below, Xiaobian has compiled relevant knowledge for everyone. Let's take a look at it! How to deal with bad weather in vegetable greenhouses?

1. Vegetable greenhouse planting: continuous shade.

There are many vegetable farmers who don't pull weeds when it is cloudy. In fact, as long as the outdoor temperature is not very low on cloudy days, grass weeds should be uncovered, because crops can also carry out photosynthesis by using scattered light. If the sun is exposed for a short time, the greenhouse temperature can also be raised. At the same time, hanging a reflective curtain on the north side or near the back wall of the greenhouse can improve the light intensity, ground temperature and greenhouse temperature.

2. Vegetable greenhouse planting: windy.

In the daytime, especially when pulling the grass, in windy weather, if the film pressing line is not tight, the wind-blown shed film will bulge and fall, which is easy to be damaged; If you build a shed, it is easy to blow the grass in a mess. It leads to the cooling in the shed and the freezing injury of crops. Therefore, when encountering windy weather, we should pay more attention to observation and take corresponding measures in time. Don't pull it all when it is windy, but press it firmly when you cover it.

3. Vegetable greenhouse planting: snowstorm.

Generally, greenhouses on cloudy days are covered with grass, and there is a certain weight on them. In addition, on windy and snowy days, the top of the greenhouse is prone to snow, and the longer the snowfall, the thicker the snow will be, which makes it easy to press the greenhouse. In this case, vegetable farmers should constantly clean up the snow and beware of thick snow.

4, vegetable greenhouse planting: strong cooling.

In winter, there are often cold current and strong cooling weather, especially for several consecutive low-temperature cloudy days, and the grass can't be uncovered in the greenhouse. In case of cold current and strong cooling weather, the crops in the greenhouse may be frozen. In this case, you should put a stove and heat it artificially in the shed. Such as charcoal pots and hot stoves, can raise the temperature and prevent freezing.

5, vegetable greenhouse planting: sudden sunny day.

On cloudy days, the temperature outside the shed is very low, so it is impossible to uncover the grass cover for several days. Once it is sunny, the sunlight is sufficient, and after uncovering the grass cover, the temperature will soon increase and the humidity will decrease. However, the ground temperature changes slowly, and the water absorption capacity of the roots is weak. If the transpiration water of crop leaves cannot be replenished in time, the leaves will wilt. In this case, the sprayer should be used immediately to spray clean water, and then the grass will be released.

6. Vegetable greenhouse planting: long-term rain and waterlogging.

In summer and autumn, after the greenhouse crops are harvested and the film is uncovered, the shed walls and scaffolding often have no protective measures. In case of long-term rain and waterlogging, the shed walls will easily collapse and even damage the scaffolding. It has caused great economic losses to vegetable farmers. Therefore, after the film is uncovered, it is necessary to pay attention to the rain protection of the shed wall.