Greenhouse cucumber watering has its subtleties; keep these precautions in mind
Cucumbers grown with improved greenhouse techniques can appear on our tables whether in spring and autumn or autumn and winter. Temperatures are now gradually rising, making this a good season for planting cucumbers. However, early spring temperatures are still low, so a greenhouse is still needed. So how should greenhouse cucumbers be watered? What should be noted? Let's learn about it together.
1. Pay attention to growth
When watering greenhouse cucumbers, first pay attention to the growth of the cucumbers and replenish water according to their growth. Generally, when greenhouse cucumbers lack water, they show shriveled leaves and weakened growth, and pests and diseases also occur more often. This is a signal that it is time to water promptly. Many farmers also water promptly and frequently when preventing and controlling pests and diseases, which also has a certain scientific basis.
2. Pay attention to soil moisture
In addition, when watering, we should also pay attention to soil moisture. Water when dry, do not water when not dry. If the soil is not watered in time, the ground temperature will drop rapidly, causing severe soil compaction and poor permeability. This will cause the cucumber roots to suffocate from lack of oxygen, leading to yellow leaves above ground and root rot. Therefore, watering must be done according to soil moisture conditions.
3. Pay attention to weather changes
Greenhouse cucumbers must be watered on a sunny day, or it must be ensured that the 2-3 days after watering are also sunny, because once watering is followed by cloudy and rainy weather, it is very easy to cause excessive humidity inside the greenhouse and a rapid drop in ground temperature. As we all know, a high-humidity environment is favorable for bacterial reproduction. Once the ground temperature drops and humidity becomes too high, pests and diseases are very likely to breed, and then the situation can get out of control. Therefore, when watering, be sure to choose a sunny day, and also pay attention to the weather forecast to ensure that no cloudy or rainy days will occur after watering.
4. Pay attention to ground temperature
The average daily ground temperature for greenhouse cucumber growth is around 22 degrees, and the temperature inside the greenhouse is between 15-20 degrees. If watering causes the ground temperature to drop rapidly, the root system will be damaged, and the above-ground plants will also be affected. If watering on a low-temperature day, it is best to open the greenhouse vents in the morning before watering, and also cover with plastic film. This can not only reduce water evaporation from the ground and keep the soil moist, but also effectively reduce the number of waterings, lower humidity, and reduce the breeding of pests and diseases.
The above is an introduction to the precautions for watering greenhouse cucumbers. We hope it can help you. To learn more related knowledge, please keep following us.