Sure, by now we are all aware that LED grow light does wonderful things for plant growth. Plants grow quicker and healthier than under other, traditional lighting methods such as HPS. If the LEDs are good, plants can grow even better than under natural sunlight. Tab sis vim li cas lawv ib txwm ntshav / liab?
All light sources contain a spectrum of colors within it – some light sources contain some of the colors, some contain all. Sunlight contains all spectrum colors and because of that feeds plants with all information they need. Additionally, because of the presence of all spectrum colors, it appears color-free to human eyes.
Thaum tsim lub teeb ci LED, peb tuaj yeem txiav txim siab seb cov xim LED chips tso rau hauv. Qhov no nyob ntawm seb hom lus teb peb xav ua tiav los ntawm cov nroj tsuag. Piv txwv li, yog tias peb xav kom cov nroj tsuag loj hlob siab, peb yuav nce qhov deb ntawm -liab, daj, txiv kab ntxwv thiab ntsuab chips nyob rau hauv lub luminaire. Yog hais tias peb xav kom cov nroj tsuag kom compact, peb yuav muab ntau xiav los yog UV xim chips.
Why plants respond in those ways to those particular colors is a broad topic. It is something that we will cover in a separate post. Either way, these responses are encoded in plants' DNA. So, when designing LED lamps, we can count on plants responding the way nature has designed them to.
We could say that the two most important light colors to place in an LED lamp are: liab and xiav. Liab yog lub ntsiab tivthaiv uas cov nroj tsuag xav tau photosynthesis thiab qia elongation inhibition. Tsis tas li ntawd, nws qhia rau cov nroj tsuag tias tsis muaj lwm yam nroj tsuag saum toj no thiab hais tias nws muaj peev xwm yog li muaj uninhibited txoj kev loj hlob. Blue stimulates stomatal qhib, qia elongation inhibition, nplooj nthuav dav, curvature ntawm lub teeb thiab photoperiodic flowering.
The combination of these two sets of effects will, in simple terms, get the plant from seed to the vegetative stage and eventually to flowering. This however will be much slower than under continuous spectra a.k.a spectra that contain more than just red and blue.
Ntxiv qee cov xim spectrum xws li ntsuab, tuaj yeem txhim kho cov nplooj nthuav dav thiab qia elongation, uas nyob rau hauv lem ua rau ntau dua biomass (yield) tsub zuj zuj. Los ntawm kev ntxiv UV wavelenghts ib qho tuaj yeem cuam tshuam rau cov khoom sib txuas xws li phenolics uas tuaj yeem txhawb nqa qhov tsw ntawm cov khoom kawg lossis nws cov txiaj ntsig kev noj qab haus huv rau tib neeg.
