How to control the temperature of watermelon in greenhouse

In order to control the temperature of watermelon in greenhouse, three aspects need to be managed: heat preservation, heating and cooling. When heat preservation, the greenhouse needs to be closed and covered with a small arch shed for heat preservation. When the temperature is low, you can make a fire, brazier and stove in the greenhouse to increase the temperature. When it is hot, you need ventilation and shading to cool down.

How to control the temperature and heat preservation measures of watermelon in greenhouse

In order to control the temperature of watermelon in greenhouse, heat preservation measures should be taken. First, the greenhouse should be closed to avoid air leakage. The greenhouse can be covered with a small arch shed or thermal insulation curtain, which can improve the warmth in the greenhouse. The periphery of the greenhouse can also be covered with grass stalks. These materials can play the role of heat preservation.

2. Heating measures

Watermelon in greenhouse needs to be heated in the low temperature season. The simpler method is to make a fire, brazier and stove directly in the greenhouse. Stay away from watermelon plants when heating up, and ventilate in time after heating up during the day to facilitate fresh air for watermelon in greenhouse.

3, cooling measures

In the hot season, it is necessary to take measures to cool the watermelon in the greenhouse. The most convenient way is to directly ventilate the plants and shade them, or spray white lime water on the surface of the greenhouse, which can reduce the light transmission in the greenhouse and play a role in cooling down by using the reflective effect of white lime.

4. Temperature requirements

Watermelon in greenhouse has different requirements for temperature in different periods. In the off-season, the daytime temperature is about 30℃, and the optimal temperature at night is about 65438 05℃. The daytime temperature of plants is about 22-25℃ at jointing stage, about 30℃ at flowering and fruit setting stage, and about 18-35℃ at watermelon fruit expansion stage.