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. Ond pam maen nhw bob amser yn borffor/pinc?
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.
Wrth adeiladu lamp LED, gallwn benderfynu pa liw sglodion LED i'w gosod y tu mewn. Mae hyn yn dibynnu ar ba fath o ymateb yr ydym am ei gael gan blanhigion. Er enghraifft, os ydym am i blanhigion dyfu'n dal, byddwn yn cynyddu'r nifer o sglodion coch, melyn, oren a gwyrdd y tu mewn i'r luminaire. Os ydym am i blanhigion fod yn gryno, byddwn yn rhoi mwy o sglodion lliw glas neu UV.
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: Coch and glas. Coch yw'r brif elfen sydd ei hangen ar blanhigion ar gyfer ffotosynthesis ac ataliad ehangiad coesyn. Yn ogystal, mae'n arwydd i'r planhigion nad oes unrhyw blanhigion eraill uwch ei ben ac y gall felly gael datblygiad dirwystr. Mae glas yn ysgogi agoriad stomatal, ataliad elongation coesyn, ehangu dail, crymedd tuag at olau a blodeuo photoperiodic.
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.
Gallai ychwanegu rhai lliwiau sbectrwm eraill fel gwyrdd, wella cyfradd ehangu dail ac ehangiad coesyn, sydd yn ei dro yn arwain at grynhoi biomas (cynnyrch) uwch. Trwy ychwanegu tonnau UV gall un effeithio ar groniad cyfansoddion fel ffenolig a allai roi hwb i flas y cynnyrch terfynol neu ei fuddion iechyd i bobl.
