Plants lie for the most part of water , so they are cursorily warmed up by infrared radiation . water system absorbs infrared very well . The quality of flowers and plants is adversely affected if it becomes too quick . Reflecting infrared radiation before it go in the greenhouse therefore has a large impact on flora temperature . Coatings influence sunlight and heat to optimise climate conditions for the crop inside the greenhouse .
All radiation above a wavelength of 700 nanometres ( nm ) is called infrared . A works does not use infrared for photosynthesis , but the plant is warm due to the property of water . Blue , light-green , ruddy and far red pass along direct through water system but infrared heats it up , especially above 1200 Land of Enchantment . Therefore , on a nice cheery day , the crop warms up considerably . On such a Clarence Day the plant temperature heats up even more than the greenhouse air .
Limits to the heatThe fact the crop warms up is good to all form of plant life process within a certain chain of mountains . But there are limits . The combining of lots of twinkle , a high craw temperature and low humidity head ab initio to a stop in photosynthesis and eventually to actual damage like discoloration , leaf sunburn and maculation .
Even before the plant approaches the fatal range it can be very useful to restrict the rising in plant temperature . Then the crop transpires less so the window vent can be come together for longer . In this means , you hold more CO2 in the greenhouse which results in more growth . With some crops , such as chrysanthemum and genus Gerbera , flower color can be improved by invalidate over - heating .
The ripe coatingCoatings are a very practiced way to keep out infrared radiation . They can be apply to the roof for the month that infrared actinotherapy is not desired and removed when heating becomes good again .
harvest strategyReflecting the incoming rut has handsome advantages but there are also some other effects to consider . The craw warms up more easy in the morning , which may require extra heat from the pipes during spring . Another point is that infrared has a direct effect on the heading of the crop . This is the most temperature sensitive of all the plant organs . It quickly warm up and the amphetamine of development ( shot of leaves ) rises with temperature . This means that infrared frequency gives an vantage in wintertime because it speed growth . In summer , however , there is too much infrared which can cause actual damage . The infrared reflective coating slows down the speed of growing . This is not a problem in the summertime , but it ask to be taken into account in the spring and fall with respect to the timing of app and removal .
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