Many years of practice have proved that the optimum temperature for photosynthesis of cucumber plant leaves is 25 °C ~ 32 °C. Temperature is too high, plant respiration is strong, and photosynthetic products are less accumulated; at low temperatures, photosynthesis of plants is reduced, and photosynthetic products are accumulated less. Sometimes, in order to promote the rapid growth of cucumber, when the relative humidity of high humidity is above 90%, snow can also be controlled in the sunny morning at 30°C to 37°C, and the temperature in the middle of the night is controlled at 18°C ​​to 21°C. In high temperature conditions, although the plants grow faster, but they age faster, so it is not appropriate to use high-temperature management methods for a long time.
Night temperature has a great influence on cucumber yield. In order to increase the yield of cucumbers, temperature management should be applied to the night temperature in accordance with different time periods in and around May. The temperature should be controlled between 18°C ​​and 21°C in 2 to 3 hours after sunset so that the photosynthetic products in the daytime can be quickly transferred to cucumbers. The temperature is controlled between 14°C and 16°C in the middle of the night and the temperature is controlled between 12°C and 13°C before sunrise in the second half of the night. Under such temperature management conditions, the photosynthetic products consumed by plant respiration are less, which facilitates the high yield of cucumber. When the night temperature is too high, especially when it exceeds 20°C, it is prone to phenomena such as melons and madness. If the management is improper, it may make the lice more prosperous and the cucumbers get less and less. This kind of situation is every April to May. Happened.
To achieve the above-mentioned temperature management indicators, we should always listen to the weather forecast, and adjust the air release time and intensity according to the heat preservation condition of our greenhouse, and whether or not to clear the haystack.
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