Umbhali: Jing Zhao, Zengchan Zhou, Yunlong Bu, njl.Umthombo weMedia:Tekhnoloji yobuNjineli bezoLimo (i-greenhouse horticulture)
Umzi-mveliso wezityalo udibanisa ishishini lanamhlanje, i-biotechnology, i-hydroponics yezondlo kunye nobuchwepheshe bolwazi ukuphumeza ulawulo oluchanekileyo oluchanekileyo lwezinto zokusingqongileyo kwindawo.Ivalwe ngokupheleleyo, ineemfuno eziphantsi kwindawo engqongileyo, inciphisa ixesha lokuvuna izityalo, igcina amanzi kunye nesichumiso, kunye neenzuzo zokuveliswa kwe-pesticide kunye nokukhutshwa kwenkunkuma, iyunithi yokusetyenziswa komhlaba ngokufanelekileyo ngamaxesha angama-40 ukuya kwi-108 yaloo nto. yokuveliswa kwebala elivulekileyo.Phakathi kwabo, umthombo wokukhanya owenziweyo okrelekrele kunye nolawulo lwayo lwemekobume yokukhanya idlala indima eqinisekileyo ekusebenzeni kwayo kwemveliso.
Njengomba obalulekileyo wokusingqongileyo, ukukhanya kudlala indima ephambili ekulawuleni ukukhula kwezityalo kunye nemetabolism yezinto."Enye yezinto eziphambili zefektri yezityalo ngumthombo ogcweleyo wokukhanya owenziweyo kunye nokuzaliseka kokulawulwa okunengqondo kwendawo yokukhanya" ibe yimvumelwano ngokubanzi kwishishini.
Imfuno yezityalo yokukhanya
Ukukhanya kuphela komthombo wamandla wefotosynthesis yesityalo.Ukukhanya okukhanyayo, umgangatho wokukhanya (i-spectrum) kunye nokutshintsha kwexesha lokukhanya kunempembelelo enkulu ekukhuleni nasekuphuhliseni izityalo, phakathi kwazo ukukhanya okunempembelelo enkulu kwi-photosynthesis yezityalo.
■ Ubunzulu bokukhanya
Ubunzulu bokukhanya bunokutshintsha imo yezityalo, ezinjengokudubula kweentyatyambo, ubude be-internode, ubukhulu besikhondo, kunye nobukhulu begqabi kunye nobukhulu.Iimfuno zezityalo zokukhanya kokukhanya zinokwahlulwa zibe zizityalo ezithanda ukukhanya, eziphakathi-ezithanda ukukhanya, kunye nezityalo ezikwazi ukunyamezela ukukhanya.Imifuno ubukhulu becala zizityalo ezithanda ukukhanya, kwaye iindawo zazo zembuyekezo yokukhanya kunye neendawo zokuhluza ukukhanya ziphezulu.Kwiifektri zezityalo zokukhanya ezenziweyo, iimfuno ezifanelekileyo zezityalo zokukhanya kokukhanya zisisiseko esibalulekileyo sokukhetha imithombo yokukhanya eyenziweyo.Ukuqonda iimfuno zokukhanya kwezityalo ezahlukeneyo kubalulekile ekuyileni imithombo yokukhanya eyenziweyo, Kuyimfuneko kakhulu ukuphucula ukusebenza kwemveliso yenkqubo.
■ Umgangatho wokukhanya
Ukuhanjiswa komgangatho wokukhanya (spectral) nako kunempembelelo ebalulekileyo kwi-photosynthesis yezityalo kunye ne-morphogenesis (Umfanekiso 1).Ukukhanya yinxalenye yemitha, kunye nemitha yemitha yi-electromagnetic wave.Amaza ombane aneempawu zamaza kunye neempawu zequantum (amasuntswana).I-quantum yokukhanya ibizwa ngokuba yi-photon kwintsimi ye-horticulture.Imitha enobude obuyi-300 ~ 800nm ibizwa ngokuba yimitha yemitha yezityalo;kunye nemitha yemitha enoluhlu lwamaza angama-400~700nm ibizwa ngokuba yi-photosynthetically active radiation (PAR) yezityalo.
I-Chlorophyll kunye ne-carotenes zezona pigments zibalulekileyo kwi-photosynthesis yezityalo.Umzobo we-2 ubonisa i-spectrum yokufunxa i-spectrum ye-pigment ye-photosynthetic nganye, apho i-spectrum yokufunxa i-chlorophyll igxininiswe kwiibhanti ezibomvu neziluhlaza.Inkqubo yokukhanyisa isekelwe kwiimfuno ze-spectral zezityalo zokuncedisa ukukhanya, ukwenzela ukukhuthaza i-photosynthesis yezityalo.
■ ixesha lokufota
Ubudlelwane phakathi kwe-photosynthesis kunye ne-photomorphogenesis yezityalo kunye nobude bemini (okanye ixesha le-photoperiod) kuthiwa yi-photoperiodity yezityalo.I-photoperiodity inxulumene ngokusondeleyo neeyure zokukhanya, ezibhekiselele kwixesha lesityalo sikhanyiselwa kukukhanya.Izityalo ezahlukeneyo zifuna inani elithile leeyure zokukhanya ukugqiba ifotoperiod ukuqhakaza nokuthwala isiqhamo.Ngokutsho kweefotoperiods ezahlukeneyo, zinokwahlulwa zibe zizityalo ezinde, ezifana neklabishi, njl., Ezifuna iiyure ezingaphezu kwe-12-14h zokukhanya kwinqanaba elithile lokukhula kwayo;izityalo zeentsuku ezimfutshane, ezifana anyanisi, iimbotyi zesoya, njl., zifuna ngaphantsi kwe-12-14h iiyure zokukhanyisa;izityalo ezinelanga eliphakathi, ezifana nekhukhamba, iitumato, iipepile, njalo njalo, zinokudubula kwaye zithwale isiqhamo phantsi kwelanga elide okanye elifutshane.
Phakathi kwezinto ezintathu zokusingqongileyo, ukukhanya kokukhanya sisiseko esibalulekileyo sokukhetha imithombo yokukhanya eyenziweyo.Okwangoku, kukho iindlela ezininzi zokubonisa ukukhanya kokukhanya, ngakumbi kuquka ezi zintathu zilandelayo.
(1) Ukukhanya kubhekiselele kubuninzi bomphezulu we-flux ekhanyayo (i-luminous flux kwindawo yeyunithi) efunyenwe kwinqwelomoya ekhanyisiweyo, kwi-lux (lx).
(2) imitha ye-photosynthetically esebenzayo, i-PAR, iYunithi: W/m².
(3) Uxinzelelo lwefoton olusebenza ngefoton olusebenzayo PPFD okanye i-PPF linani lemitha ye-photosynthetically esebenzayo efikelela okanye edlula kwiyunithi yexesha kunye nendawo yeyunithi, iyunithi:μmol/(m²·s)。Ikakhulu ibhekisa kukukhanya kokukhanya kwe-400~700nm enxulumene ngokuthe ngqo ne-photosynthesis.Ikwayeyona nto isetyenziswa ngokuqhelekileyo isalathisi sokukhanya kwintsimi yemveliso yezityalo.
Uhlalutyo lomthombo wokukhanya wenkqubo yokukhanya eyongezelelweyo eqhelekileyo
Ukongezwa kokukhanya okwenziweyo kukwandisa ukukhanya kokukhanya kwindawo ekujoliswe kuyo okanye ukwandisa ixesha lokukhanya ngokufaka inkqubo yokukhanya eyongezelelweyo ukuzalisekisa imfuno yokukhanya kwezityalo.Ngokuqhelekileyo, inkqubo yokukhanya eyongezelelweyo ibandakanya izixhobo zokukhanya ezongezelelweyo, iisekethe kunye nenkqubo yayo yokulawula.Imithombo yokukhanya eyongezelelweyo ikakhulu ibandakanya iintlobo ezininzi eziqhelekileyo ezifana nezibane ze-incandescent, izibane ze-fluorescent, izibane zesinyithi ze-halide, izibane ze-sodium ezinoxinzelelo oluphezulu kunye nee-LED.Ngenxa yombane ophantsi kunye nokusebenza kakuhle kwezibane ze-incandescent, ukusebenza kakuhle kwamandla e-photosynthetic kunye nezinye iintsilelo, kupheliswe yimarike, ngoko eli nqaku alenzi uhlalutyo olucacileyo.
■ Isibane seFluorescent
Izibane zeFluorescent zezohlobo lwezibane zokukhutshwa kwegesi ephantsi.I-tube yeglasi igcwele i-mercury vapor okanye igesi ye-inert, kwaye udonga lwangaphakathi lombhobho lufakwe kwi-fluorescent powder.Umbala okhanyayo uyahluka kunye nezinto ze-fluorescent ezifakwe kwi-tube.Izibane zeFluorescent zisebenza kakuhle, ukukhanya okuphezulu, amandla aphantsi, ubomi obude (12000h) xa kuthelekiswa nezibane ze-incandescent, kunye nexabiso eliphantsi.Ngenxa yokuba isibane se-fluorescent ngokwaso sikhupha ubushushu obuncinci, sinokusondela kwizityalo zokukhanyisa kwaye zifanelekile ukulima okuthathu.Nangona kunjalo, i-spectral layout yesibane se-fluorescent ayinangqiqo.Eyona ndlela ixhaphakileyo ehlabathini kukongeza izikhanyisi ukuze kwandiswe amacandelo omthombo wokukhanya osebenzayo wezityalo kwindawo yokulima.Inkampani yaseJapan iadv-agri ikwaphuhlise uhlobo olutsha lomthombo wokukhanya owongezelelweyo iHEFL.I-HEFL eneneni yeyodidi lwezibane ze-fluorescent.Ligama eliqhelekileyo kwizibane ezibandayo ze-cathode fluorescent (CCFL) kunye nezibane ze-electrode fluorescent zangaphandle (EEFL), kwaye sisibane esixubileyo se-electrode fluorescent.Ityhubhu ye-HEFL ibhityile kakhulu, inobubanzi obumalunga ne-4mm kuphela, kwaye ubude bunokulungiswa ukusuka kwi-450mm ukuya kwi-1200mm ngokweemfuno zokulima.Yinguqulelo ephuculweyo yesibane esiqhelekileyo se-fluorescent.
■ Isibane se-Metal halide
Isibane se-metal halide sisibane sokukhupha esinamandla esinokuthi sivuyise izinto ezahlukeneyo ukuvelisa amaza amaza ahlukeneyo ngokongeza i-halides yesinyithi eyahlukeneyo (i-tin bromide, iodide yesodium, njl. njl.) kwityhubhu yokukhupha ngesiseko sesibane semercury soxinzelelo oluphezulu.Izibane zeHalogen zinokukhanya okuphezulu okuphezulu, amandla aphezulu, umbala wokukhanya olungileyo, ubomi obude, kunye ne-spectrum enkulu.Nangona kunjalo, ngenxa yokuba ukusebenza okukhanyayo kuphantsi kunezibane eziphezulu ze-sodium, kwaye ubomi bufutshane kunobubane bezibane ze-sodium ezinoxinzelelo oluphezulu, okwangoku kusetyenziswa kuphela kwiifektri ezimbalwa zezityalo.
∎ Isibane soxinzelelo oluphezulu lwesodium
Izibane zesodium ezinoxinzelelo oluphezulu zezohlobo lwezibane zokukhutshwa kwegesi ephezulu.Isibane esiphezulu se-sodium sisibane esiphezulu esiphezulu apho umphunga we-sodium ophezulu woxinzelelo uzaliswe kwi-tube yokukhupha, kunye nenani elincinci le-xenon (Xe) kunye ne-mercury metal halide yongezwa.Ngenxa yokuba izibane eziphezulu ze-sodium zinezinga eliphezulu lokuguqulwa kwe-electro-optical kunye neendleko eziphantsi zokuvelisa, izibane eziphezulu ze-sodium okwangoku zisetyenziswa kakhulu ekusebenziseni ukukhanya okongeziweyo kumaziko ezolimo.Nangona kunjalo, ngenxa yeentsilelo ze-photosynthetic ephantsi ye-photosynthetic kwi-spectrum yabo, baneziphene zokusebenzisa amandla aphantsi.Ngakolunye uhlangothi, izinto ezibonakalayo ezikhutshwa zizibane zesodium ezinoxinzelelo oluphezulu zigxininiswe kakhulu kwibhendi yokukhanya etyheli-orenji, engenawo umboniso obomvu noluhlaza okwesibhakabhaka oyimfuneko ekukhuleni kwezityalo.
■ Idayidi ekhupha ukukhanya
Njengesizukulwana esitsha semithombo yokukhanya, ii-light-emitting diodes (i-LEDs) zineengenelo ezininzi ezifana nomgangatho ophezulu wokuguqulwa kwe-electro-optical, i-spectrum ehlengahlengiswayo, kunye nokusebenza kakuhle kwe-photosynthetic.I-LED inokukhupha ukukhanya kwe-monochromatic okufunekayo ekukhuleni kwesityalo.Xa kuthelekiswa nezibane eziqhelekileyo ze-fluorescent kunye neminye imithombo yokukhanya eyongezelelweyo, i-LED ineenzuzo zokulondoloza amandla, ukukhuselwa kwendalo, ubomi obude, ukukhanya kwe-monochromatic, umthombo wokukhanya okubandayo njalo njalo.Ngophuculo olongezelelweyo lwe-electro-optical effectiveness ye-LEDs kunye nokunciphisa iindleko ezibangelwa yimpembelelo yesikali, iinkqubo zokukhanyisa izibane ze-LED ziya kuba zizixhobo eziqhelekileyo zokuncedisa ukukhanya kumaziko ezolimo.Ngenxa yoko, izibane zokukhulisa i-LED zifakwe kwiifektri zezityalo ezingama-99.9%.
Ngokuthelekisa, iimpawu zemithombo yokukhanya eyongezelelweyo eyahlukileyo zinokuqondwa ngokucacileyo, njengoko kubonisiwe kwiThebhile 1.
Isixhobo sokukhanyisa esiselfowuni
Ukuqina kokukhanya kuhambelana ngokusondeleyo nokukhula kwezityalo.Ukulima okumacala amathathu kudla ngokusetyenziswa kwimizi-mveliso yezityalo.Nangona kunjalo, ngenxa yokucuthwa kobume beeracks zokulima, ukuhanjiswa okungalinganiyo kokukhanya kunye nobushushu phakathi kwee-racks kuya kuchaphazela isivuno sezityalo kwaye ixesha lokuvuna aliyi kulungelelaniswa.Inkampani yaseBeijing iphuhlise ngempumelelo isixhobo sokunyusa isibane sokuphakamisa ukukhanya (i-HPS yokukhanyisa izibane kunye ne-LED ekhulayo yokukhanyisa) ngo-2010. ukufezekisa injongo yokuhlehlisa kunye nokukhulula intambo yocingo.Intambo yocingo yokukhanya okukhulayo idityaniswe kunye nevili elijikajikayo le-elevator ngokusebenzisa iiseti ezininzi zamavili okubuyisela umva, ukuze kuphunyezwe umphumo wokulungelelanisa ukuphakama kokukhanya kokukhula.Ngo-2017, inkampani ekhankanywe ngasentla yenzelwe kwaye yaphuhlisa isixhobo esitsha sokukhanya okuhambayo, esinokuthi silungelelanise ngokuzenzekelayo ukuphakama kwesongezelelo sokukhanya ngexesha lokwenyani ngokweemfuno zokukhula kwesityalo.Isixhobo sokulungelelanisa ngoku sifakwe kwi-3-layer yomthombo wokukhanya wokuphakamisa uhlobo lwe-rack yokulima ye-3-dimensional rack.Uluhlu oluphezulu lwesixhobo lunqanaba kunye neyona meko yokukhanya engcono kakhulu, ngoko ixhotyiswe ngezibane ze-sodium ezinoxinzelelo oluphezulu;umaleko ophakathi kunye nomgangatho osezantsi uxhotyiswe ngezibane ezikhulayo ze-LED kunye nenkqubo yokulungelelanisa yokuphakamisa.Iyakwazi ukulungelelanisa ngokuzenzekelayo ubude bokukhanya okukhulayo ukubonelela indawo yokukhanya efanelekileyo yezityalo.
Xa kuthelekiswa nesixhobo esongezelelweyo sokukhanya esiselfowuni esenzelwe ukulinywa kumacala amathathu, iNetherlands iphuhlise isixhobo sokukhanya sokukhanya esishukumayo esishukumayo se-LED.Ukuthintela impembelelo yesithunzi sokukhanya kokukhula ekukhuleni kwezityalo elangeni, inkqubo yokukhanya yokukhula inokutyhalelwa kumacala omabini esibiyeli ngesilayidi se-telescopic kwicala elithe tye, ukuze ilanga libe ngokupheleleyo. iradiated kwizityalo;ngeentsuku ezinamafu kunye nemvula ngaphandle kokukhanya kwelanga, Tyhala inkqubo yokukhanya yokukhula kumbindi wesibiyeli ukwenza ukukhanya kwenkqubo yokukhanya yokukhula ngokulinganayo kuzalise izityalo;hambisa inkqubo yokukhanya ngokuthe tye ngesilayidi esikwisibiyeli, kunqande ukuqhawuka rhoqo kunye nokususwa kwenkqubo yokukhanya yokukhulisa, kwaye unciphise ubungakanani bomsebenzi wabasebenzi, ngaloo ndlela uphucula ngempumelelo ukusebenza kakuhle.
Yila imibono yenkqubo yokukhanya eqhelekileyo
Akunzima ukubona kuyilo lwesixhobo esongezelelweyo sokukhanyisa ukuba uyilo lwenkqubo yokukhanyisa eyongezelelweyo yefektri yezityalo ihlala ithatha ukukhanya, umgangatho wokukhanya kunye neeparamitha zefotoperiod zamaxesha ahlukeneyo okukhula kwezityalo njengomxholo ophambili woyilo. , ukuthembela kwinkqubo yokulawula ingqiqo ukuphumeza, ukufezekisa injongo yokugqibela yokugcina amandla kunye nesivuno esiphezulu.
Okwangoku, uyilo kunye nokwakhiwa kokukhanya okongeziweyo kwimifuno enamagqabi kuye kwavuthwa ngokuthe ngcembe.Umzekelo, imifuno enamagqabi inokohlulwa ibe ngamanqanaba amane: inqanaba lezithole, phakathi kokukhula, ukukhula kade, nenqanaba lokugqibela;Iziqhamo-imifuno zingohlulwa ngokwenqanaba lezithole, inqanaba lokukhula kwezityalo, inqanaba leentyantyambo kunye nenqanaba lokuvuna.Ukusuka kwiimpawu zokukhanya okongeziweyo, ukukhanya kwinqanaba lokugalela kufuneka kube ngaphantsi kancinane, kwi-60 ~ 200 μmol/(m²·s), emva koko kwande kancinci.Imifuno enamagqabi inokufikelela kwi-100 ~ 200 μmol/(m²·s), kunye nemifuno yeziqhamo inokufikelela kwi-300~500 μmol/(m²·s) ukuqinisekisa iimfuno zokukhanya kokukhanya kwefotosynthesis yezityalo kwixesha ngalinye lokukhula kunye nokuzalisekisa iimfuno ze isivuno esikhulu;Ngokomgangatho wokukhanya, umlinganiselo obomvu ukuya eluhlaza okwesibhakabhaka kubaluleke kakhulu.Ukuze kwandiswe umgangatho wezithole kwaye kuthintelwe ukukhula okugqithisileyo kwinqanaba lezithole, umlinganiselo obomvu ukuya koluhlaza okwesibhakabhaka ubekwa kumgangatho ophantsi [(1~2):1], emva koko uncitshiswe ngokuthe ngcembe ukuhlangabezana neemfuno zesityalo. i-morphology elula.Umlinganiselo wombala obomvu ukuya koluhlaza okwesibhakabhaka ukuya kwimifuno enamagqabi unokumiselwa ukuba (3~6):1.Kwi-photoperiod, efana nokukhanya kokukhanya, kufuneka ibonise umkhwa wokunyuka kunye nokwandiswa kwexesha lokukhula, ukwenzela ukuba imifuno enamagqabi ibe nexesha elingakumbi le-photosynthesis ye-photosynthesis.Uyilo lokuncedisa ukukhanya kweziqhamo kunye nemifuno luya kuba nzima ngakumbi.Ukongeza kwimithetho esisiseko ekhankanywe ngasentla, kufuneka sigxininise ekumiseni i-photoperiod ngexesha leentyantyambo, kunye neentyantyambo kunye neziqhamo zemifuno kufuneka zikhuthazwe, ukuze zingabuyi.
Kuyafaneleka ukukhankanya ukuba ifomyula yokukhanya kufuneka ibandakanye unyango lokugqibela lwemimiselo yokukhanya kwendawo.Umzekelo, ukuxhaswa kokukhanya okuqhubekayo kunokuphucula kakhulu isivuno kunye nomgangatho wezithole zemifuno enamagqabi e-hydroponic, okanye usebenzise unyango lwe-UV ukuze luphucule kakhulu ihlumela kunye nemifuno enamagqabi (ingakumbi Amagqabi amfusa kunye ne-lettuce yegqabi elibomvu) umgangatho wesondlo.
Ukongeza ekongezeni ukukhanya kwizityalo ezikhethiweyo, inkqubo yokulawula umthombo wokukhanya yezinye iifektri zezityalo zokukhanya ezenziweyo nayo iphuhliswe ngokukhawuleza kwiminyaka yakutshanje.Le nkqubo yokulawula ngokubanzi isekelwe kwisakhiwo se-B / S.Ulawulo olukude kunye nokulawulwa ngokuzenzekelayo kwezinto zokusingqongileyo ezifana neqondo lokushisa, umswakama, ukukhanya, kunye nokugxininiswa kwe-CO2 ngexesha lokukhula kwezityalo zenziwa nge-WIFI, kwaye kwangaxeshanye, indlela yokuvelisa engathintelwanga yimeko yangaphandle iyenzeka.Olu hlobo lwenkqubo yokukhanya eyongezelelweyo ekrelekrele isebenzisa ukukhanya kwe-LED njengomthombo wokukhanya owongezelelweyo, kudityaniswa nenkqubo yokulawula enengqondo ekude, inokwanelisa iimfuno zokukhanya kobude bezityalo, ilungele indawo yokulima elawulwa ngokukhanya, kwaye inokuhlangabezana kakuhle nemfuno yentengiso. .
Amagqabantshintshi okuqukumbela
Iifektri zezityalo zithathwa njengendlela ebalulekileyo yokusombulula ubutyebi behlabathi, abantu kunye neengxaki zokusingqongileyo kwinkulungwane yama-21, kunye nendlela ebalulekileyo yokuphumeza ukwanelisa ukutya kwiiprojekthi ezizayo zobuchwepheshe obuphezulu.Njengohlobo olutsha lwendlela yemveliso yezolimo, iifektri zezityalo zisekwinqanaba lokufunda nokukhula, kwaye ingqwalasela engakumbi kunye nophando luyafuneka.Eli nqaku lichaza iimpawu kunye noncedo lweendlela zokukhanyisa ezongezelelweyo eziqhelekileyo kwiifektri zezityalo, kwaye lazisa imibono yoyilo lweenkqubo zokukhanyisa ezongezelelweyo zezityalo.Akunzima ukufumana ngokuthelekisa, ukuze uhlangabezane nokukhanya okuphantsi okubangelwa yimozulu embi enjengamafu aqhubekayo kunye nenkungu kunye nokuqinisekisa imveliso ephezulu kunye nozinzo lwezityalo eziluncedo, izixhobo zomthombo wokukhanya we-LED zihambelana kakhulu nophuhliso lwangoku. iindlela.
Umkhombandlela wophuhliso wexesha elizayo wefektri zezityalo kufuneka ugxile ekuchanekeni okuphezulu okutsha, izinzwa zexabiso eliphantsi, ezilawuleka kude, iinkqubo zesixhobo sokukhanyisa isibane esilungelelanisiweyo kunye neenkqubo zolawulo lweengcaphephe.Kwangaxeshanye, iifektri zezityalo zexesha elizayo ziya kuqhubeka ziphuhlisa ukuya kumaxabiso aphantsi, ubukrelekrele, kunye nokuziqhelanisa nokuziqhelanisa.Ukusetyenziswa kunye nokuthandwa kwemithombo yokukhanya ye-LED inika isiqinisekiso solawulo oluchanekileyo oluchanekileyo lwendalo yeefektri zezityalo.Ukulawulwa kokusingqongileyo kokukhanya kwe-LED yinkqubo entsonkothileyo ebandakanya ukulawulwa okubanzi komgangatho wokukhanya, ukuqina kokukhanya, kunye nefotoperiod.Iingcali ezifanelekileyo kunye nabaphengululi kufuneka baqhube uphando olunzulu, ukukhuthaza ukukhanya kwe-LED okongeziweyo kwiifektri zezityalo ezikhanyayo.
Ixesha lokuposa: Mar-05-2021