Summer high temperature attack, greenhouse planting vegetables are easy to suffer, fruit farmers do a good job to prevent high temperature measures.

Summer high temperature attack, greenhouse planting vegetables are easy to suffer, fruit farmers do high temperature prevention measures!

After entering the summer in various regions of the country, the temperature is generally relatively high. Summer is a hot and rainy season. This is a great test for vegetable growers, most of the vegetable farmers will be in May ~ June for vegetable transplanting and colonization. When it comes to summer, the high temperature environment is conducive to the growth of vegetables, but in summer, the daytime and night temperature is relatively high, the temperature difference between day and night will be small, which is a bad environment, if not properly managed, it will cause the flower bud differentiation during the growth of vegetables, hindered by the flowering and fruit rate deteriorates, and prone to a large number of problems such as falling flowers and fruit. It will reduce the yield and quality of vegetables and affect the income of vegetable farmers.

Therefore, when planting vegetables in the greenhouse in summer, in order to ensure the yield and quality of vegetables, to improve the yield, we need to do a good job of high temperature protection measures, to cool down, but also to do a good job of light humidity management and other issues. Avoid adverse environmental problems such as high temperature and strong light or high temperature and weak light during the development of vegetables.

First, the harm caused by high temperature to vegetables in summer

Normally, the most suitable soil temperature for vegetable growth is about 18~25 degrees Celsius. If you want vegetables to grow normally, the ambient temperature should be controlled between 25~28 degrees Celsius, and at night it should be between 15~18 degrees Celsius. During the day, the temperature in the greenhouse has been at more than 35 degrees Celsius, and the temperature at night is more than 18 degrees Celsius, that is to say, the temperature difference between day and night is below 10 degrees, which will cause the root of the planted vegetables to be affected, prone to malabsorption of stems and leaves, flowers and fruits during reproduction imbalance, but also easy to cause high temperature disorders and other problems.

When affected by these, there will be vegetable wilting, leaf wilt and other problems, this situation will cause the yield and quality of vegetables are seriously affected. For some vegetables with color, it is easy to appear uneven coloring, such as tomatoes, cucumbers, peppers and so on, but also easy to lead to fruit deformity. In addition, when the high temperature and drought in summer, it is easy to induce more serious viral diseases.

Two, summer high temperature protection measures

1. Use shading facilities to reduce the temperature in the greenhouse

There are a lot of vegetable-growing areas right now, and it's likely that the temperature has reached 35 degrees Celsius, and it's going to stay hot. When encountering continuous extremely high temperature weather, when the temperature gradually rises, the sun screen should be used to reduce the temperature in the greenhouse. But vegetable farmers still need to pay attention to some problems when using.

The color should pay attention to the choice of black or silver gray is mainly used in the present, the choice of color should be selected according to the planting of vegetables. Under normal circumstances, vegetables planted in greenhouses do not have a large demand for sunlight, or can not accept strong sunlight, at this time, you need to choose to have a strong shading ability to choose black. And if the greenhouses are planted with vegetables that like bright light, such as cucumbers or tomatoes, then the efficiency of using sunshade nets is low, you can also choose silver gray. Although these vegetables like bright light, they are not able to withstand continuous sunlight above 35 degrees Celsius.

2. Scientific ventilation

The proper ventilation in the greenhouses should be known to experienced vegetable farmers. When the temperature in the greenhouse is too high, it must be timely ventilation, which is a way to directly reduce the temperature in the greenhouse. Of course, when ventilating the greenhouse in summer, it is necessary to master certain skills. If the ventilation is not correct, it will have a certain impact on the planted plants.

When the temperature is too high during the day, according to the situation at that time, the roof and the bottom of the greenhouse all open, pay attention to make good use of the vent, so that the air forms a certain convective state, so that the temperature can be quickly discharged, to reduce the temperature in the greenhouse.

3. Timely irrigation

When the summer heat continues, it is not only necessary to use air to cool the room, but also to use water. When the indoor temperature is high, the temperature of the soil is also high. If the temperature of the soil is not reduced, the growth of vegetables will be inhibited. When the temperature of the soil is too high, the growth of the root system will be inhibited, resulting in aging and other problems. Therefore, the method of spraying water with glue can be used appropriately to reduce the temperature of the soil. At the same time, spraying water in the greenhouse can also reduce the temperature in the greenhouse, but also increase the humidity.