Keeping temperature of greenhouse is a basic condition for maintaining the good growing of crops in the greenhouse production.
Generally speaking, the temperature can change following the change of the outside. The change rule: the temperature of the greenhouse outside is higher, the temperature increment inside greenhouse is bigger. On the contrary, the temperature increment is little. In general, the appearance of the highest temperature and the lowest temperature in greenhouse is late for about 2 hours than the open ground.
The temperature in greenhouse always changes with the change of weather and seasons. The users can increase a series of protecting measures in accordance with the change rule of greenhouse temperature when using to keep a constant temperature. Sunny day temperature difference is much bigger and that in rainy day is little. The more lower the temperature, the more higher the day temperature. Conversely, it is more lower. Besides, the users can also strength the adjusting work of temperature in greenhouse according to the suitable growth temperature requirements of early maturing cultivated vegetables.
Meanwhile, the temperature requirements of different crops also exist difference. The users can adjust with the actual condition and the crops demand. For example, it doesn't need to ventilate after and before the seedlings. So as to increase the ground and air temperature in greenhouse. And it's also conducive to the crop growth. Moreover, the users should adjust with the season condition. The increasing temperature effect in greenhouse is worse because of the weak lighting of early spring. They can take measures that covering with plastic film and increasing small arch shed to improve the temperature increase and preservation effect.
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