Kule minyaka eyishumi edlule, ukukhanyisa kwe-LED kuzuze isithakazelo esikhulu njengomthombo wokukhanya owengeziwe oyonga amandla ku-greenhouse horticulture engashintsha ngokushesha ngokuqina nokwakheka kwe-spectral. Ukwakheka kwe-Spectral akuthinti nje kuphela i-physiology yezitshalo kodwa kungase futhi kuthinte ibhayoloji yamagciwane, izinambuzane, nezitha zazo zemvelo, kokubili ngokuqondile nangokungaqondile ngomthelela wokumelana nezitshalo okubangelwayo.
Ucwaningo lwakamuva olwenziwe yiBusiness Unit Greenhouse Horticulture, Wageningen University & Research, luphenya imiphumela ye-spectrum yokukhanya ngokumelene nesizinda sokukhanya kwelanga ekukhuleni nasekuthuthukisweni kwe-Solanum melongena. Le miphumela yayihlobene nemiphumela ye-spectral ekusungulweni kwezibalo ze-Amblyseius swirskii ezingelayo kanye nokuqina kwezitshalo ngokumelene ne-biotrophic fungus powdery mildew, i-necrotrophic fungus botrytis, kanye ne-herbivorous arthropod Western flower thrips.
Imiphumela yesilinganiso esincishisiwe esibomvu/obomvu-kude (R:FR) yafundwa ngaphansi kwezilinganiso ezimbili zokukhanya okubomvu kuya kokuluhlaza okwesibhakabhaka. Ukukhanya okubomvu kakhulu kunikezwe ngaphezu kwalokho ku-photosynthetic photon flux density (PPFD) noma kwathathelwa indawo i-PPFD kancane, kuyilapho kugcinwa i-photon flux density (PFD). Imithelela yokukhanya okumhlophe noma ukukhanya okwengeziwe kwe-UV-B ekuqineni kwesitshalo kwahlolwa, uma kuqhathaniswa nesithenjwa (5% okuluhlaza okwesibhakabhaka, 5% okuluhlaza okotshani, kanye no-90% wokukhanya okubomvu). I-biomass yezitshalo esigabeni sokumila iyenyuka lapho kunikezwa ukukhanya okwengeziwe okubomvu-kude. Ubude besiqu bukhuphuke ngokubomvu kakhulu, kungakhathalekile i-PPFD kanye nephesenti lokukhanya okuluhlaza okwesibhakabhaka.
Esigabeni sokukhiqiza, i-biomass ephelele yehlumela kanye nezisindo ezintsha zezithelo zaziphakeme ngaphansi kokukhanya okwengeziwe okubomvu kakhulu, kulandelwa izindlela zokwelapha lapho okubomvu ngokwengxenye kuthathe indawo ye-PPFD. Ukukhanya okubomvu okukude kwandise ukwahlukanisa kwe-biomass kuzithelo, ngezindleko zamaqabunga. Kwakungekho mehluko ekukhuleni kwesibalo sama-A. swirskii mites phakathi kokwelashwa okulula, futhi ukwelapha okulula akuzange kube nomthelela ekusabalaleni okuqondile kwalezi zimbuzane ezidla ezinye ezitshalweni.
Ukwelashwa ngokukhanya okwengeziwe okubomvu-kude kunciphisa izinga lokutheleleka kwe-powdery mildew, kodwa kwenyusa ukutheleleka kwe-botrytis. Lo mehluko ungaba ngenxa yokuzivikela kwezitshalo okulwa nalawa magciwane avela ezindleleni ezimbili ezihlukene zokulawula. Le miphumela ikhombisa ukuthi imiphumela emihle yokwakheka kwe-spectral eshintshile ekuphenduleni kokusebenza komzimba yanxeshezelwa ngokusesilinganisweni ngokwanda kokungenwa ngamagciwane okukhunta, okunikeza umbono we-greenhouse horticulture esimeme.
Funda ucwaningo oluphelele ku-www.frontiersint.org.
U-Anja Dieleman J, u-Marjolein Kruidhof H, u-Weerheim K kanye no-Leiss K (2021) Amasu Okukhanya Kwe-LED Athinta I-Physiology Nokuqina Kumagciwane Nezinambuzane Ku-Eggplant (Solanum melongena L.). Ngaphambili. Isitshalo Sci. 11:610046. doi: 10.3389/fpls.2020.610046