Coatings soften the glasshouse mood ; this provides an opportunity to exchange how the climate and watering are controlled . Two crop adviser discuss the principle that apply to tomatoes , genus Gerbera and alstroemeria .
“ The cooling force in a greenhouse is the crop itself . In the summer it is important to let down the plant ’s temperature . To accomplish this you must keep the craw grow well so that it can cool off itself through desiccation . A coating is an important financial aid in this regard , ” says Marco van Noord of Horti - Consult International .
He advises tomato plant agriculturalist in North - West Europe . In this region , strong mature vegetal varieties can in all likelihood supervise without a coating , he think . “ But for a generative variety or a variety that is highly sensible to heyday - end rotting , I always recommend ReduFuse IR . Possibly affix with SprayChalk during utmost summertime atmospheric condition . ”
The covering glower the head temperature and ascertain that the plant stay dynamic and more resistant longer . Van Noord commend that the coating be applied ahead of time in the spring ; March - April is the best clip . “ In the beginning , the coat results in a somewhat lower glasshouse temperature . You need to take this into considerateness . you could do this by put the post - night temperature higher by 0.5 - 1 ° C in the morn . Furthermore , watering can be started up somewhat subsequently during the initial weeks . If you normally start watering when radiation sickness is 150 W , you may increase this to 200 W with a coating . This will make a difference of half an hour , ” he says .
In a continental climate , extra cooling may be command in mid - summer . For model , by applying a SprayChalk stratum on top of the diffuse layer . “ As an emergency measure you may also exit the movable subtlety projection screen , but at that point the warmth is already inside the greenhouse . You should really keep the heat out in the first stead . A covering is the just solvent for this . ”
Marco van Noord of Horti - Consult International advises tomato agriculturist in North - West Europe .
Night TemperatureHigh - pressure misting is gaining ground as a mean value of providing increase cooling . “ The same berth applies here as well ; the estrus is already inside the greenhouse . This is why combining a coat with in high spirits - pressure mist over is a good solution . This manner the industrial plant stays more active , ” he say .
Furthermore , it is important to as much as potential take reward of night - time to fetch the temperature back down again . “ That mean you should hold out the other night computer determine by start the windows , albeit at a crack in order not to fall behind too much wet . You should ensure that the greenhouse reaches the minimum temperature one hour prior to morning . ”
The watering rule he applies is to multiply the light vigour by a constituent of 3 to 3.2 . For example , for 2000 joules you need to supply 6 litres . “ With a coating you could keep a generation agent of 2.8 at the beginning . However , afterwards on this difference disappear . In fact , with a coating you do not really supply less body of water over the course of the twelvemonth . But your cooling capacity is greater , however . ”
Alstroemeria and GerberaCrop advisor Marco de Groot of the Flori Consult Group also often give notice his customers to use ReduFuse IR . He specialise in gerbera and alstroemeria , and influence with growers in Europe and North America . “ In the past tense , grower tended to use ReduHeat . However , the experience was discrepant . Sometimes the harvest was too short and the quality inferior for these specific crop . ReduSol was more effective in these situation . However , in recent long time good effect are being accomplish with a ReduFuse IR coating , ” he says .
Alstroemeria is a crop that has difficultness with evaporation and run to close down the tegument pores middling quickly in the good afternoon . When a diffuse software is applied , the skin pores stay open much longer . “ You really postulate to take this into considerateness . The plant evaporates more and as a result you must clearly provide more water system , particularly by increasing the watering frequency . This means that the watering interval become shorter . ”
This evenly apply to alstroemerias planted in the solid ground , as well as in a substratum . It is also necessary to use much brusk intervals for genus Gerbera . For example , every 30 minutes , he says .
Marco de Groot of Flori Consult Group advises genus Gerbera and alstroemeria growers in Europe and North America .
Diffuse Light throughout the YearWhen the crop evaporates well , the greenhouse temperature stays noticeably lower and the crop stays more active . “ I am a big proponent of diffuse light and am managing the craw for the ‘ Alstroemeria of the Future ’ , project superintend by Wageningen University & Research . The usefulness of year - round diffuse scant forms part of this project . ”The Flori Consult Group utilise the PAR ( Photosynthetic Active Radiation ) board to cope with light and temperature levels . “ This is no different with coatings . On our recommendation , all of our customers have instal a PAR meter in their greenhouse in recent years and habituate it to regulate the temperature associated with the current light story . measure show that in case of variable weather condition you are always just a fleck too recently when you use a gear up CRT screen . With a coating you are always on time . In character of varying atmospheric condition the net PAR in the greenhouse is always greater with a coating than with a screen organisation . As a answer , with ReduFuse IR you’re able to maintain a somewhat higher temperature – on the basis of the PAR Table – than with a deposit sieve system . ”
For more information : ReduSystems+31(0)13 507 53 99[email protected]www.redusystems.com
© FloralDaily.com/Elita Vellekoop
