Tau kawg, muaj cov kev sib tw hauv ib qho kev siv technology tshiab, thiab muaj kev sib tw hauv LED-raws li kev teeb pom kev zoo. Tam sim no, cov kev paub ntawm cov khoom siv hluav taws xob teeb pom kev zoo tseem nyob qis heev. Txawm tias cov kws tshawb fawb horticultural uas tau koom nrog ntau xyoo tseem kawm txog "lub teeb mis" ntawm cov nroj tsuag. Qee qhov "formulas" tshiab no tsis ua tau tam sim no.
Cov tuam txhab teeb pom kev lag luam hauv Asia feem ntau yog cov khoom lag luam pheej yig tab sis cov khoom lag luam qis, thiab ntau cov khoom siv qis hauv khw tsis muaj ntawv pov thawj xws li UL kev ntsuam xyuas, nrog rau LM-79 luminaire reports thiab LM-80 LED qhia. Ntau tus neeg cog qoob loo tau sim siv lub teeb pom kev zoo ntawm LED thaum ntxov, tab sis muaj kev ntxhov siab los ntawm kev ua haujlwm tsis zoo ntawm lub teeb pom kev zoo, yog li cov teeb pom kev siab sodium tseem yog tus qauv kub hauv kev lag luam.
Ntawm chav kawm, muaj ntau yam zoo LED loj hlob teeb pom kev zoo khoom ntawm lub khw. Txawm li cas los xij, horticultural thiab floral growers tseem xav tau kev ntsuas zoo dua cuam tshuam nrog rau daim ntawv thov. Piv txwv li, American Society of Agricultural and Biological Engineers (ASABE) Agricultural Lighting Committee pib tsim cov qauv ntsuas hauv xyoo 2015. Txoj hauj lwm no tab tom txiav txim siab txog cov metrics ntsig txog PAR (Photosynthetically Active Radiation) spectrum. PAR ntau feem ntau txhais tau tias yog spectral band ntawm 400-700 nm, qhov twg photons nquag tsav photosynthesis. Cov kev ntsuas feem ntau cuam tshuam nrog PAR suav nrog photosynthetic photon flux (PPF) thiab photosynthetic photon flux ntom (PPFD).
Daim ntawv qhia thiab ntsuas
Cov "daim ntawv qhia" thiab metrics yog intertwined vim hais tias tus grower xav tau kev ntsuas los txheeb xyuas seb cov nroj tsuag luminaire muab kev siv zog thiab spectral power distribution (SPD), uas suav nrog "daim ntawv qhia".
Kev tshawb fawb thaum ntxov tau tsom mus rau kev sib raug zoo ntawm chlorophyll nqus mus rau lub zog spectral, vim tias chlorophyll yog tus yuam sij rau cov txheej txheem photosynthesis. Cov kev tshawb fawb hauv chav kuaj pom tau hais tias lub zog peaks nyob rau hauv xiav thiab liab spectra phim lub siab nqus, thaum lub zog ntsuab qhia tias tsis nqus. Kev tshawb fawb thaum ntxov ua rau muaj kev xa khoom ntau ntawm cov teeb liab lossis ntshav liab ntawm lub khw.
Txawm li cas los xij, kev xav tam sim no tau tsom mus rau kev teeb pom kev zoo uas muab lub zog siab tshaj plaws nyob rau hauv xiav thiab liab spectrum, tab sis tib lub sij hawm emits ib tug dav spectrum ntawm illumination zoo li lub hnub ci.
Lub teeb dawb tseem ceeb heev
Siv tsuas yog liab thiab xiav LED loj hlob teeb yog heev outdated. Thaum koj pom ib yam khoom nrog cov spectrum no, nws yog raws li kev tshawb fawb qub thiab feem ntau to taub yuam kev. Yog vim li cas tib neeg xaiv xiav thiab liab yog vim hais tias cov wavelength peaks no zoo ib yam nrog cov nkhaus nqus ntawm chlorophyll a thiab b sib cais hauv lub raj kuaj. Peb paub niaj hnub no tias tag nrho cov wavelengths ntawm lub teeb nyob rau hauv lub PAR ntau pab tau rau kev tsav tsheb photosynthesis. Tsis muaj qhov tsis ntseeg tias qhov spectrum tseem ceeb, tab sis nws muaj feem xyuam nrog cov nroj tsuag morphology xws li qhov loj thiab cov duab.
Peb tuaj yeem cuam tshuam qhov siab thiab flowering ntawm cov nroj tsuag los ntawm kev hloov cov spectrum. Qee cov neeg cog qoob loo tas li kho lub teeb ci thiab SPD vim tias cov nroj tsuag muaj qee yam zoo ib yam li circadian atherosclerosis, thiab feem ntau cov nroj tsuag muaj qhov tshwj xeeb rhythms thiab "formulation".
Kev sib xyaw xim liab thiab xiav tseem ceeb kuj yog qhov zoo rau cov nplooj zaub xws li lettuce. Tab sis nws kuj tau hais tias rau cov nroj tsuag paj, suav nrog txiv lws suav, kev siv zog ntau dua li qhov tshwj xeeb spectrum, 90 feem pua ntawm lub zog nyob rau hauv high-pressure sodium teeb nyob rau hauv cov xim daj, thiab cov lumens nyob rau hauv flowering nroj tsuag horticultural teeb (lm. ), lux (lx) Thiab kev ua tau zoo yuav raug ntau dua li PAR-centric metrics.
Cov kws tshaj lij siv 90 feem pua phosphor-hloov dawb LEDs hauv lawv lub luminaires, nrog rau qhov seem yog liab lossis deb-liab LEDs, thiab dawb LED-raws li xiav illumination muab tag nrho cov xiav lub zog xav tau rau kev pom zoo.
