In summer, the light in the shed is intense and the temperature is too high, which affects the normal growth of vegetables. After the summer, the vegetable farmers must find a way, or cover the sunshade net, or spray the cooling agent, mud, and block part of the light to reduce the temperature inside the shed. However, whether it is a shade net or a cooling agent or mud, once it is overused or encounters severe weather such as continuous cloudy weather, it will cause high temperature and low light environment, and the photosynthetic products are not even enough to meet the respiratory consumption, resulting in weak plant growth, yellow leaves. , thin, small, poor flower bud differentiation, deformed fruit, the yield and quality are greatly affected. Therefore, in summer, it is necessary to ensure that the environmental conditions such as temperature, light and humidity are balanced, and extreme conditions such as high temperature and low light and high temperature drying are avoided. When using the sunshade net, be sure to choose a sunshade with a low light-shielding rate. The shading time should not exceed 4 hours; the cooling agent should be sprayed evenly. On the basis of appropriate shading, through the facilities such as sprinkler irrigation and atomizing nozzles, the temperature in the shed can be lowered by spraying water to increase the humidity and create a more suitable environment. Sprinkler irrigation The summer temperature is high, not only the temperature is high, but the ground temperature is also high. Even for warm vegetables, such as cucumber, the most suitable ground temperature is 28 ° C, more than 30 ° C will accelerate aging. Therefore, in the summer, when trying to reduce the temperature, we must also pay attention to properly lowering the ground temperature. Under the current conditions, the best way to reduce the ground temperature is to water the water to cool down. The water will heat up and evaporate will take away a lot of heat, and will increase the humidity in the shed and adjust the environment. At present, the sprinkler irrigation facilities are simple to install, easy to use, and not costly. Sprinkler irrigation facilities are an essential choice for farmers who want to grow summer vegetables. Spraying water 1-2 times during the summer can effectively reduce the ground temperature and temperature, and ensure the normal growth of vegetable roots. Atomization Want to do a good balance of temperature and light, to avoid excessive shading, atomization cooling facilities is the best choice. On the basis of ensuring strong light and photosynthesis, it is the most practical method to reduce the temperature in the shed by atomizing water spray. At present, there is an intelligently controlled atomization cooling facility on the market. After the temperature in the shed rises to a certain level, it is automatically sprayed and cooled, which is convenient to use and has a good effect. Of course, the atomization and cooling facilities are currently costly and need to be well maintained, and are suitable for planting high-value vegetable varieties such as colored peppers, tomatoes, and cucumbers. Pay attention to the nighttime cooling and increase the temperature difference between day and night The summer temperature is high, the temperature difference between day and night is small, and the nighttime breathing consumption is large, which is the main factor for the low yield and quality of summer vegetables. Especially high-fat vegetable types such as melon and cherry tomatoes are more susceptible. Therefore, how to increase the temperature difference between day and night in the summer and reduce the night temperature in the shed is a very important issue. In the summer shed, the night temperature is high, mainly due to the accumulation of heat on the surface, walls, etc., caused by nighttime release. There is no earth wall in the arch shed to store heat, which is more suitable for summer production. However, in the greenhouse, if you want to carry out vegetable production in summer, you must find ways to reduce the heat storage in the wall. You can cover the wall with thermal insulation materials such as reflective film and straw, and reduce the heat absorption of the wall. This is the basic measure to reduce the heat release at night. For the reduction of ground temperature, proper dense planting, increasing the leaf area index, reducing the time of direct sunlight on the surface during the day, and increasing transpiration are effective measures to reduce the heat absorption on the surface. In addition, proper watering is also the best way to reduce ground temperature. In the evening, using sprinkler irrigation facilities to spray water for a short time, only wet the surface, through the evaporation of water, can take away a lot of heat, speed up the reduction of surface temperature, help control the night temperature in the shed, and increase the temperature difference between day and night. In summer, the temperature is too high. If you want to reduce the temperature in the shed and increase the temperature difference between day and night, you can't rely on simple shading. You can also use a variety of measures to achieve the balance of temperature, light and humidity, and create an environment more suitable for vegetable growth. In order to achieve normal production of summer vegetables, others do not have their own, vegetables are not sold at high prices. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
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