Temperature and Humidity: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
| − | Temperature and humidity are paired together as they are so closely linked. Generally, humidity in a growing context refers to [https://en.wikipedia.org/wiki/Humidity Relative Humidity] (RH). |
+ | Temperature and humidity are paired together as they are so closely linked. Generally, humidity in a growing context refers to [https://en.wikipedia.org/wiki/Humidity Relative Humidity] (RH). As temperature decreases the amount of water vapour it can hold before it condenses back into a liquid decreases. In other words, hotter air can hold more water vapour per volume than cold air can. The Temperature and humidity can also be used to calculate the Vapour pressure deficit (VPD) which provides a measure of how open the cultivar's [[Anatomy_of_Cannabis#Stomata|stomata]] are and it's capacity for [[Plant_processes#gas_exchange|gas exchange]] |
This article by [https://www.royalqueenseeds.com/blog-indoor-cannabis-growing-relative-humidity-and-temperatures-n243 Royal Queen Seeds] covers the physical relationship between temperature and humidity and the values that are best for the plant at each stage of growth. |
This article by [https://www.royalqueenseeds.com/blog-indoor-cannabis-growing-relative-humidity-and-temperatures-n243 Royal Queen Seeds] covers the physical relationship between temperature and humidity and the values that are best for the plant at each stage of growth. |
||
| ⚫ | |||
| ⚫ | |||
==Ventilation == |
==Ventilation == |
||
Ventilation is a very important part of having control over the temp and humidity. In other words, a fan is crucial. Blower (centrifugal fans) should be used for this type of ventilation<ref>Centrifugal Fan vs Axial Fan | Industrial Accessories Company - https://www.youtube.com/watch?v=gYxLbBP3evM </ref> |
Ventilation is a very important part of having control over the temp and humidity. In other words, a fan is crucial. Blower (centrifugal fans) should be used for this type of ventilation<ref>Centrifugal Fan vs Axial Fan | Industrial Accessories Company - https://www.youtube.com/watch?v=gYxLbBP3evM </ref> |
||
| + | |||
| + | ==Vapour pressure deficit (VPD)== |
||
| + | The VPD is the difference between how much water there is in the air (AVP) and the maximum amount of water the air can currently hold (SVP). |
||
| + | |||
| + | |||
| ⚫ | |||
| ⚫ | |||
== References == |
== References == |
||
Revision as of 19:03, 15 February 2021
Temperature and humidity are paired together as they are so closely linked. Generally, humidity in a growing context refers to Relative Humidity (RH). As temperature decreases the amount of water vapour it can hold before it condenses back into a liquid decreases. In other words, hotter air can hold more water vapour per volume than cold air can. The Temperature and humidity can also be used to calculate the Vapour pressure deficit (VPD) which provides a measure of how open the cultivar's stomata are and it's capacity for gas exchange
This article by Royal Queen Seeds covers the physical relationship between temperature and humidity and the values that are best for the plant at each stage of growth.
Ventilation
Ventilation is a very important part of having control over the temp and humidity. In other words, a fan is crucial. Blower (centrifugal fans) should be used for this type of ventilation[1]
Vapour pressure deficit (VPD)
The VPD is the difference between how much water there is in the air (AVP) and the maximum amount of water the air can currently hold (SVP).
Ideal conditions
The ideal temperature is range is 24°- 28°C[2] while the ideal humidity is 40-60%
References
- ↑ Centrifugal Fan vs Axial Fan | Industrial Accessories Company - https://www.youtube.com/watch?v=gYxLbBP3evM
- ↑ Chandra et al. (2008) - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3550641/pdf/12298_2008_Article_27.pdf