CO2
Phalaenopsis is a CAM plant (Crassulacean Acid Metabolism), which means that it takes up
CO2 at night; this is in contrast to most other plants, which take up CO2 during the day.
When CO2 is present, endeavour to achieve values between 600-800 ppm.
Relative humidity
Although Phalaenopsis can protect themselves reasonably well from the effects of an
excessively low relative humidity, their growth will nevertheless benefit from a relative
humidity that is not too low. However a high relative humidity in combination with high
temperatures increases the risk of bacterial diseases. Endeavours should be made to
maintain the relative humidity within the 60 to 80% range. In situations in which the relative
humidity is low – and certainly in combination with higher temperatures – it is important to
install systems that will increase the relative humidity, such as systems that do not wet the
crop (for example, high-pressure humidification in the upper region of the glasshouse,
sprinkler lines under the pots, pad/fan systems, etc.) An additional major benefit is that the
moisturising system will also ensure that the temperature is reduced.
CO2Phalaenopsis is a CAM plant (Crassulacean Acid Metabolism), which means that it takes upCO2 at night; this is in contrast to most other plants, which take up CO2 during the day.When CO2 is present, endeavour to achieve values between 600-800 ppm.Relative humidityAlthough Phalaenopsis can protect themselves reasonably well from the effects of anexcessively low relative humidity, their growth will nevertheless benefit from a relativehumidity that is not too low. However a high relative humidity in combination with hightemperatures increases the risk of bacterial diseases. Endeavours should be made tomaintain the relative humidity within the 60 to 80% range. In situations in which the relativehumidity is low – and certainly in combination with higher temperatures – it is important toinstall systems that will increase the relative humidity, such as systems that do not wet thecrop (for example, high-pressure humidification in the upper region of the glasshouse,sprinkler lines under the pots, pad/fan systems, etc.) An additional major benefit is that themoisturising system will also ensure that the temperature is reduced.
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