How to Control the Night Temperature in Shed in Summer
The high temperature in the summer greenhouses has brought inconvenience to the production of vegetables. High night temperatures are the key to many problems. There is no light at night, if the temperature is too high, the respiration of vegetable plants has been maintained at a high intensity, which will cause a large amount of organic nutrients to be produced during the day, resulting in delicate plants, serious drop and fruit drop. Therefore, vegetable farmers must pay attention to control the night temperature of the shed.
Shade watering combination
In order to reduce the temperature in the greenhouse during the day, vegetable growers tried various methods, such as covering the shade nets, spraying cooling agents, pouring mud, etc., but sometimes it was difficult to achieve the intended purpose. Instead, the plants grew weaker and flowering fruit set was more difficult. Although the temperature in the greenhouse is reduced to a certain extent only through the sunshade, the low light environment causes the photosynthetic rate to decrease, and the accumulation of organic nutrients is less, which is unfavorable to the production of vegetables.
Water is a magic weapon for cooling down in summer. Water can be combined with the shade to achieve the purpose of both reducing the temperature without affecting the normal growth of vegetables. By regularly and reasonably watering and spraying fresh water, the temperature of the greenhouse can be controlled within the range suitable for growing vegetables. Every morning, a shed is required to observe soil moisture and determine if watering is needed. Watering is usually performed in the morning or evening. If there is no time to water in the morning, the temperature in the shed is too high. Water can be sprayed into the shed, and it must not be watered when the temperature is high at noon.
The combination of shading, watering, and water spray can greatly reduce the temperature in the shed during the day and reduce the heat storage in the shed, which greatly helps to reduce the night temperature in the shed.
Reasonable pruning coverage
In addition to shading and watering, there is another way to reduce the temperature, that is to find ways to avoid seeing the soil in the shed, so that the soil absorbs less heat.
First of all, rational pruning, adjusting the plant type, to ensure that the branches cover the ridge, so that the sun shines on the plant as much as possible, this will not only increase the photosynthetic area of ​​the leaves, but also reduce the visible light area of ​​the soil in the shed, killing two birds with one stone. This reminds farmers who grow summer vegetables that they should be careful not to blindly operate in the summer.
Second, crop stalks can be covered between rows. Covering crop stalks in a vegetable operation line is a very effective cooling measure. The principle is very simple, this is equivalent to the greenhouse covered with a "mat", the soil below the straw temperature is low, just suitable for the normal growth of the root system. With a strong root system, the plant's ability to absorb water and fertilizer is strong, nutrient supply is guaranteed, and the resistance of the crop is also enhanced.
Reduce the heat storage of the wall
An important place for heat storage in the shed is the shed wall, including the back wall and gable of the shed. Can be used to cover the back wall of the greenhouse, such as non-woven fabrics, which can reduce the heat absorbed by the wall.
In the shed wall roots and columns, it is also possible to plant some vine crops such as beans, melons, etc., to reduce the heat storage capacity of the shed walls and columns. The cement column absorbs heat quickly and emits heat quickly. When planting beans, try to allow the stems to wrap around the column and pack all the columns, which can effectively reduce the heat absorption of the column.
Shade watering combination
In order to reduce the temperature in the greenhouse during the day, vegetable growers tried various methods, such as covering the shade nets, spraying cooling agents, pouring mud, etc., but sometimes it was difficult to achieve the intended purpose. Instead, the plants grew weaker and flowering fruit set was more difficult. Although the temperature in the greenhouse is reduced to a certain extent only through the sunshade, the low light environment causes the photosynthetic rate to decrease, and the accumulation of organic nutrients is less, which is unfavorable to the production of vegetables.
Water is a magic weapon for cooling down in summer. Water can be combined with the shade to achieve the purpose of both reducing the temperature without affecting the normal growth of vegetables. By regularly and reasonably watering and spraying fresh water, the temperature of the greenhouse can be controlled within the range suitable for growing vegetables. Every morning, a shed is required to observe soil moisture and determine if watering is needed. Watering is usually performed in the morning or evening. If there is no time to water in the morning, the temperature in the shed is too high. Water can be sprayed into the shed, and it must not be watered when the temperature is high at noon.
The combination of shading, watering, and water spray can greatly reduce the temperature in the shed during the day and reduce the heat storage in the shed, which greatly helps to reduce the night temperature in the shed.
Reasonable pruning coverage
In addition to shading and watering, there is another way to reduce the temperature, that is to find ways to avoid seeing the soil in the shed, so that the soil absorbs less heat.
First of all, rational pruning, adjusting the plant type, to ensure that the branches cover the ridge, so that the sun shines on the plant as much as possible, this will not only increase the photosynthetic area of ​​the leaves, but also reduce the visible light area of ​​the soil in the shed, killing two birds with one stone. This reminds farmers who grow summer vegetables that they should be careful not to blindly operate in the summer.
Second, crop stalks can be covered between rows. Covering crop stalks in a vegetable operation line is a very effective cooling measure. The principle is very simple, this is equivalent to the greenhouse covered with a "mat", the soil below the straw temperature is low, just suitable for the normal growth of the root system. With a strong root system, the plant's ability to absorb water and fertilizer is strong, nutrient supply is guaranteed, and the resistance of the crop is also enhanced.
Reduce the heat storage of the wall
An important place for heat storage in the shed is the shed wall, including the back wall and gable of the shed. Can be used to cover the back wall of the greenhouse, such as non-woven fabrics, which can reduce the heat absorbed by the wall.
In the shed wall roots and columns, it is also possible to plant some vine crops such as beans, melons, etc., to reduce the heat storage capacity of the shed walls and columns. The cement column absorbs heat quickly and emits heat quickly. When planting beans, try to allow the stems to wrap around the column and pack all the columns, which can effectively reduce the heat absorption of the column.
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