Good afternoon, my reader. Crops growing in a greenhouse can wither due to insufficient air or high temperatures. To prevent plants from overheating, it is important to control and maintain humidity and air temperature at a certain level.
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Required air temperature and humidity for various crops
Depending on the crop, the created microclimate in the greenhouse should be as follows:
- The air temperature for cucumbers growing in a greenhouse should be no more than 28 degrees during the day. Soil temperature - from 22 to 24 degrees Celsius. The optimum night temperature is between 18 and 21 degrees. At a humidity of 75-85%.
- For tomatoes, the most suitable temperature during the day will be from 20 to 24 degrees Celsius. At night - 18 degrees. The recommended soil temperature is from 20 to 22 degrees. At a humidity of 60-70%.
- When growing bell peppers in a greenhouse, it is necessary to maintain the daytime temperature at 25 to 28 degrees Celsius. At night - from 20 to 23 degrees. The soil temperature should be 20-22 degrees. At a humidity of 66-75%.
- Eggplants should be grown at an air temperature during the day - 25-28 degrees Celsius. At night - about 20 degrees. Soil temperature is from 20 to 22 degrees. At a humidity of 50-60%.
Based on these data, it becomes clear that not all agricultural crops can be grown in one greenhouse at once due to differences in the required indicators of humidity and air temperature.
Ways to lower the temperature
In order to reduce the temperature in the greenhouse, it is recommended to open windows and doors for ventilation in the morning. However, in the absence of wind, this method will not always bring the expected results, so you can resort to other effective measures.
Paint the greenhouse
One of these methods is to paint the greenhouse structure using a special solution: clay, chalk and lime are applied to the inner walls. Due to such actions, a minimum of the sun gets into the greenhouse, respectively, the air in the room heats up less. It is important to consider that it is necessary to paint the walls in advance, before the plants are planted. This method is only suitable for greenhouses made of polycarbonate.
Cover the greenhouse with special material
Another effective way is to cover the greenhouse with a special material - white or colored spunbond or reflective protective mesh, which can be easily installed on the greenhouse due to fastenings. It is better to cover the greenhouse from the top or from the southeast, depending on its location.
Use plants to create shade
Dense plants can be planted near the greenhouse: shrubs or vines. They will partially absorb the sun's rays and shade the greenhouse. If desired, you can place them inside the structure. However, it should be understood that on cloudy or rainy days, they will absorb all the light.
Ventilate the greenhouse
When installing the greenhouse, be sure to make several vents that will allow you to ventilate the room. It is desirable that they are at different ends of the structure. If opening the vents does not help to cool the air very much, you can install several fans. They should be turned on during the day for cooling.
Put containers with water
Installing containers with water will reduce the difference in temperature fluctuations between day and night: during the day, water absorbs solar heat, and at night gives it to plants.
Or place plastic or glass water bottles next to the ridges. Later, this water is used to water the plants.
Increasing humidity in the greenhouse
As the humidity level in the greenhouse rises, the plants will start to rot or become infected with fungus. With insufficient humidity, they will dry out. In order to keep this indicator under control, you can use a hygrometer. Mulching the soil or ventilating the greenhouse will help reduce the moisture level.
In order to increase the humidity level, it is recommended:
- Installing a steam generator or water spray. The only difficulty may be the need for regular water supply for such devices.
- Carrying out regular watering of plants and row spacings in the morning. As a result, the water will no longer evaporate from the greenhouse.
When building a greenhouse, try to ensure that the design allows you to prevent excessive drought and heat indoors. This will avoid difficulties while growing plants.
Do you know how to prevent dry air and regulate humidity in your greenhouse?
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