Reflecting too much or too little light impingement on production in any harvest . With ReduSol , it is easy to adjust the per centum of light and heat that is reflected . But heat accent is often a big problem than too much light . In that case , ReduHeat is the answer .
In any craw , more Inner Light means more yield . But there is a limit , and that limit disagree depend on the crop and often even the mixed bag . So , the introductory precept with coatings is to keep as much light descend in as possible while protect the crop against potential damage .
Both light stress and heat stress can damage the crop . In recent years , horticultural inquiry has regularly shown that heat stress plays a much fully grown role in many crops than unaccented stress . If a cultivator can manage the climatic stipulation decent , they can let in more light , which will result in higher production , better quality , and a degraded growth rate . But it is also essential to keep the relative humidness high enough and not to lease the flora temperature rise too in high spirits .
Reflecting both light and heatReduSol is the coating of selection for growers who want to think over both light source and heat energy . Even a thin finish will soon reflect 20 % of the solar actinotherapy . The maximum you could achieve is 40 % . That ’s the net reflection of the coating . But the glasshouse roof also reflects light , so with the maximum coating heaviness , you’re able to reduce the amount of solar radiation syndrome reach the crop by as much as 75 - 80 % compared with the level measured outside the nursery .
This can be a upright solution in region with very high light stage . In these term , the leaf always functions at a sub - optimal level in guild to protect itself against too much light . What ’s more , high light level produce complimentary radicals – essence that react sharply with all parts of the works electric cell , causing legal injury and potentially even cell expiry . In temperate zones , growers lean to opt for a thinner coating combined with cover that they can fold at peak light levels .
In many instance , the amount of light a crop can cope with is jazz . This data is match with the ontogeny of light intensity over the course of the year . Then a light design can be drawn up for the whole year , in which the coating , the adjustable concealment strips , and the climate control system interact to achieve the optimal result .
high temperature radiationSunlight consists of three components : UV , PAR , and infrared luminousness . You mostly do n’t want to test out too much PAR light because the plant uses it for photosynthesis and , consequently , for production . Infrared visible light , also known as heating system radiation , heats up the harvest . Up to a full point , that ’s a right thing , give that all industrial plant processes speed up as the temperature rises . But there is a limit : the combination of high luminousness intensity , a high plant temperature , and low humidity will first convey photosynthesis to a stop and will then cause damage to the plant . The plant does nothing at all with the mass of the infrared light , so it is quite safe to percolate it out . That is what ReduHeat does . In the PAR mountain range , ReduHeat eliminates between 10 and 16 % of the light , depending on the thickness of the coating . In the infrared range , it gets disembarrass of as much as 30 % . So , it keeps a significant proportion of the warmth radiation sickness out of the greenhouse while at the same fourth dimension greatly reducing the risk of heat stress .
PhalaenopsisTheo Verbeek , cultivation handler at Dutch orchid growers Ammerlaan Orchideeën , draw the benefit of both coatings . The company has two sites in De Lier and Schipluiden . “ vegetive growth takes station at De Lier , ” Verbeek excuse . “ Then we move the plants , bench and all , to Schipluiden , where we grow them on for a while . After that , they go into the cooling section to promote flowering . After six weeks , they are run to the generative area . That segment is above the processing area ; the plant are just two meters below the crank . ”
Phalaenopsis is a shade - loving plant that is very sore to too much lighting . It is what is sleep together as a CAM plant , which photosynthesizes in a different means . During the night , the orchid tie up CO2 in the form of malate , but its capacity for storing malate is special . During the mean solar day , the malate is converted into moolah by photosynthesis , for which igniter is needed . At some point , the lay in malate is used up , and the plant ca n’t make purpose of any extra illumination . That is why raiser tend to form rigorously with a maximal permissible light sum per Clarence Day .
Verbeek again : “ At the generative microscope stage , we apply a tripping essence of 7 mol / m2 . We also confine the light grade to 250 W / m2 as otherwise , the leaf temperature rise too eminent . We aim for a folio temperature of 23 - 24 ° C . ” If the solar radiation rises above 250 W / m2 , the screen close . All sections of the greenhouse are surface with ReduSol from the beginning of March onwards when the natural clean level starts to become too much for the industrial plant . If the weak grade still gets too high , they use the screens as well .
“ But that was n’t enough in the reproductive area , where the plants are just below the field glass , ” Verbeek sum up . “ Even in early February , you’re able to have days with alternating sunshine and clouds , and that make believe for a very unsettled mood . And you ca n’t expend ReduSol yet as you need to accomplish your wakeful meat . We recover that ReduHeat was the solvent ; we use it as early as week 7 . ”
Combining ReduHeat and ReduSolVerbeek has four years of experience with this approach under his belt . Before that , he would have episodic problems with underperformers , with flower spikes not developing in good order because of the rising plant temperature . “ We would get fortune of single spike alternatively of double ones , which signify that the plant was deserving much less . Without ReduHeat , we had to shut the screen at as little as 150 W / m2 , which necessarily costs you light . Since we started using ReduHeat , the climate has become more settled without impacting our light substance . And that results in right quality plants . ”
He applies a coating of ReduSol on top of the ReduHeat around week 14 - 15 . Once the ReduSol is apply , the coating has the combined holding of both product . The two coating were removed in early September . “ This system works very well for us , ” the grower concludes .
For more data : ReduSystemsTel . : +31(0)13 507 53 99[email protected]www.redusystems.com
