Wednesday good afternoon catch a packed house at Delphy in Bleiswijk . With more than 220 registrations , the LightEvent was filled to capacitance . There was plenty to discuss , as evidenced by the dB levels during the coffee breaks .
During the plenary opening , the gang watched the figures that Corné van Steekelenburg of Samax conjure up on the screen . A serial of workshops then covered ( electropositive ) practical experience with LED lighting , raw inquiry results , and technical advance .
Hard figures"Take action , " Corné urged the audience during his presentation . The crux of his talking on the ' economics of lighting ' was : ensure flexibility and a more diverse software program of heat reservoir . rely entirely on CHP ( Combined Heat and Power ) is no tenacious ( economically ) viable .
The CEO of the companionship , which help around forty business with their energy management , recalculated the aftermath of the newfangled legislation for the consultation . For good example , for lit vegetable finish , the energy cost per square meter are expected to increase by 9.12 euro per square meter between 2024 and 2030 .
Corné van Steekelenburg , from Samax .
Originally , the organization plan to start the good afternoon with a presentment on how retail , the sector , and consumers watch light up in the near future with current sustainability issues . However , this did not materialize , as Dennis Medema of Dutch Greenhouse Horticulture explained . They organise the good afternoon together with Wageningen University & Research Business Unit Greenhouse Horticulture , Delphy Improvement Centre , and Plant Lighting as part of the Greenhouse as Energy Source program .
A full house at the Delphy Improvement Centre .
Practical experience : evaporation ' at an satisfactory level’After the modified plenary session , it was time for thirteen workshops and three tours . From this extensive program , participants could choose three part . Those who opted for hard-nosed cultivation experiences heard from cultivation managing director Cees Maan from Lans . The large tomato grower uses special light-emitting diode fixtures , with an desegregate fan . In the future , Lans would like to be able-bodied to control the fans individually from the reparation , as well as the semblance in the LED lamp . The LED lamp are dimmable already .
Last wintertime , Lans used a few greenhouses with hybrid lighting and a few with full - LED . In the full - guide finish , the loudness was increase from 200 to 300 micromoles . This turn on the growers to get drying up , a challenge in extend cultivation , ' to an acceptable floor ' .
Cees Maan from Lans and Jaco den Bakker of WUR .
put in heat : how and where?Challenges are always present . Lans is still considering where just they require to enclose high temperature in the crop . It ’s crucial not to let the ripening prison term of the fruits take too long , Cees underline . His experience is that especially in other lit cultivation , the growth duration of the fruit is long in the heart of winter . Cees explicate this by rapid plant growth in the autumn , after which the day-by-day temperature drop in November and December , mayhap extending the growth continuance . " With a later planting in October , this is less of a job . "
Cucumber cultivation also saw an increase in lighting last wintertime . Rens Smith , cultivation advisor at Delphy , shared his experiences . Like Cees , he noted that it seems that with high intensity lighting , the desiccation difficulty will rapidly diminish . Then the discussion switch to the doubt : How cursorily do you shift your lighting on and off ? dead turning on all the lights is not advisable . local area internet ramp up from 0 to 300 micromoles in 1 hour , in two steps . " Just like how we ramped up to 200 micromoles in two steps with HPS . " Cees ' advice : ensure the crop is already warm up before the light goes on . At the end of the day , Rens see that many growers alternate off ' along with the daylight ' .
Jaco hideout Bakker , former raiser and now working at WUR , kicked off the shop and also resolve it . His conclusion : with higher light intensities , the problem with drying up decreases and the site is ' acceptable ' . However , it rest worth researching how and where to inclose the extra rut in the cultivation . Cees : " You need a certain vitality base for quality . " An extra challenge : tomato grower are cultivating with many new , ToBRFV - resistant varieties . As a agriculturalist from the audience reason out : ' As both the LED lighting and the motley is newfangled , you have to learn to uprise all over again . '
Controlling with spectrumAs with previous result on kindling , there was no one single answer to the question ' how to grow with LED ' . The matter is still too complex . Consider , for example , the spectrum , which Kees Weerheim of WUR extensively comprehend in his workshop .
The investigator talk over various trials , including in the cultivation of greenhouse veggie . Here , growers want to know how they can mold the plant by shifting the spectrum . Kees ' preliminary conclusion : going for shoot uniformness is not easy . Those who want to achieve uniform shoot might do better to increase the light intensity , it seems .
Viewing trial run : moisture problemsBesides workshop , there was a choice of three tour . In the Delphy Improvement Centre , trials in vegetables and ornamentals could be viewed . At WUR , participant saw a mixture of both vegetable and ornamental trial .
Linda Nooren explicate a tryout with eggplant light-emitting diode culture . Linda Nooren and Stijn Jochems of Delphy took a mathematical group along the vegetable trials . In an ongoing LED tryout in eggplant , the preliminary conclusion is that it ’s mainly still search for a suitable variety before all run preferences can be adjusted for optimum finish . Stijn : " Our theme is that the current spectrum is good enough . "
In a tomato trial , researchers are trying to nail evaporation and the problems growers see with it in practice . As a cause of evaporation problems , unevenly colorful fruit were reported among others . Two nursery with different humidity levels were otherwise kept indistinguishable . The preliminary conclusion : humble drying up does not necessarily get the problems encountered in practice .
Stijn Jochems discusses a tomato test focused on evaporation .
Technical innovationsTechnical innovation are also moving on . In an eggplant trial , low - E methamphetamine hydrochloride is being quiz again , simultaneously with a mention cultivation at the practical raiser Greenbrothers . In a big trial , researcher are also looking at the combination with alive dehumidification , where heating system from greenhouse air is recovered and reintroduce into the greenhouse . This result in very low gas consumption . The ultimate goal : to practice a maximum of 11 - 12 three-dimensional meters per solid meter per year .
duct above and below the craw in a greenhouse with low - E trash .
in particular eye - catching is the especially adapted greenhouse for a trial by Horconex and Voltiris . Kaz Vermeer Swiss startup briefed participant on harvest solar Department of Energy with a smart solar gore organisation within the glasshouse . A secondary benefit now also being explore is how the system can contribute to reducing heat in the nursery . The system with solar control panel that can turn out with the sun can also reduce intense Dominicus irradiation .
Kaz Vermeer in front of the greenhouse particularly adapted for a tryout with Voltiris ' invention . The complete tad CRT screen is lower by one metre for integration of the special solar venire in the greenhouse .
Even more command optionsFor those not yet filled with information , there was finally a glimpse of a test by the Canadian lighting provider Sollum . It is one of the ( still ) few parties where the spectrum is also controllable . This just run short to show that , even though light-emitting diode has been actively used for already about ten year , there are new possibility every class . just hang a mix of fleeceable - blue light in the nursery is no longer sufficient . Something cultivator also earn , hence the mellow turnout once again at the LightEvent .
Next check : the EnergyEvent in the summer . Because without vim , there ’s no lighting .
© FloralDaily.com/Thijmen Tiersma
