Ungaziqeda Kanjani Izilokazane Ze-Hydroponics Eklasini Ngaphandle Kwezifutho Ezinobuthi
Uziqeda ngokuhlasela umjikelezo wazo wempilo ngokomshini nangokwebhayoloji izilokazane ze-hydroponics eklasini: amakhadi aphuzi anamathelayo okuqapha, ama-nematode anenzuzo ezibungwini zezimpande, i-potassium silicate yokuqinisa izindonga zezitshalo, nensipho ye-potassium emsulwa yezilokazane ezihlala emaqabungeni.
Awukwazi ukusebenzisa izibulala-zinambuzane zamakhemikhali eklasini, futhi akudingeki nokuba uzenze njalo. Izinqubomgomo zezempilo zasezikoleni, izinhlelo zokungenisa umoya ezivalekile, nokuba seduze kwabafundi kukuvala ngokushesha ukusetshenziswa kwama-pyrethroid, ama-organophosphate, kanye nezibulala-zinzwa ezihamba ngaphakathi ezitshalweni (systemic neurotoxins). Esikhundleni salokho, ukususa izilokazane ze-hydroponics eklasini kudinga uhlelo Lokulawulwa Kwezinambuzane Ngokuhlanganyela (Integrated Pest Management - IPM): bopha izinambuzane ezindala emakhadini anamathelayo ukuvimbela ukuzala, faka ama-nematode amancane acathamelayo ezintweni zokutshala ukuze azingele izibungu, sula amaqabunga ngensipho ye-potassium exutshwe namanzi, bese unikeza izitshalo i-potassium silicate ukuze uqinise izindonga zamaseli ekuhlaselweni okuzayo.
Izilokazane Ezintathu Ezihlasela Amasistimu Aseklasini
Amasistimu e-hydroponics aseklasini—kungaba yi-deep water culture (DWC), i-nutrient film technique (NFT), noma imibhoshongo emile ebekwa ematafuleni—asebenza ezindaweni ezifudumele, ezivalekile zangaphakathi ezingenazo izilwane ezingaphandle ezizingela izinambuzane ngokwemvelo. Izilokazane ezintathu yizona ezibangela cishe konke ukuhlaselwa okubi kakhulu:
- Izimpukane zesikhunta (izinhlobo ze-Bradysia): Izimpukane ezincane ezimnyama ezihamba budlabha phezu kwamabhodwe anembobo (net pots) noma ezintanta phezulu emithonjeni yamanzi okunomsoco. Ezindala azidali monakalo omkhulu ngaphandle kokucasula othisha, kodwa izibungu zazo ezingaphansi komhlaba zidlela ezimpandeni ezithambile futhi zisabalalise amagciwane abolisa izimpande (njenge-Pythium).
- Izintwala zezitshalo (Aphids): Amaqembu amakhulu ezilokazane eziluhlaza, ezimnyama, noma ezikhanyayo ezinemizimba ethambile ezimunca ijusi ngaphansi kwamaqabunga amancane nasezihlokweni ezintsha ezimilayo. Zikhipha uketshezi olunamathelayo olubizwa nge-honeydew olubangela ukukhula kwesikhunta esimnyama (black sooty mould).
- Izibungu zolwembu ezinamachashaza amabili (Two-Spotted Spider Mites): Izilokazane ezincane kakhulu zohlobo lolwembu ezanda emaklasini omile anama-air-conditioner noma anezifudumezi zasebusika. Zidala amachashaza aphuzi acolekile ebusweni bamaqabunga futhi zishiye ubulembu obufana nosilika phezu kwezihloko ezimilayo lapho inani lazo liqala ukwanda kakhulu.
Isinyathelo 1: Ukunqanda Ngokomzimba Kanye Namakhadi Anamathelayo
Izinambuzane ezindala kumele zinqandwe ngaphambi kokuba zibekele iqoqo elilandelayo lamaqanda. Lengisa amakhadi aphuzi anamathelayo ngqo ngenhla kwezitshalo bese ubeka iziqephu ezincane ezilalisiwe phezu kwamabhodwe anembobo noma amatshe obumba (clay pebbles).
Amakhadi aphuzi anamathelayo awazona nje izicupho ezingenamsebenzi; angamathuluzi okuhlola nokubona izifo. Ukuhlola la makhadi njalo ngoMsombuluko ekuseni kukutshela ukuthi ngabe ubhekene nentwala yesitshalo enezimpiko eduke yangena ngefasitela elivulekile yini, noma ngabe kuphuma izimpukane zesikhunta ezichanyuselwe emakhiyubheni anomswakama e-rockwool. Uma ubona izimpukane zibuthana ezindaweni zesivalo somthombo wamanzi, namathisela ithephu phezu kwezimbobo ezingavaliwe, izikhala zamabhodwe, kanye nezindawo zokungena kwamapayipi. Uma izimpukane zingakwazi ukufinyelela endaweni yezimpande enomswakama, azikwazi ukubekela amaqanda.
Isinyathelo 2: Ukulawula Ngokwebhayoloji Endaweni Yezimpande (Ama-nematode Anenzuzo)
Uma ubona izimpukane zesikhunta, inkinga yakho ingaphansi kwebhodwe elinembobo, hhayi emoyeni. Ukushaya izimpukane ezindala akusizi ngalutho ukumisa amakhulu ezibungu ezikhanyayo ezidla izicubu zezimpande ngaphakathi kwe-rockwool noma ubumba olunwetshiwe (expanded clay).
Isinyathelo esiphephe kakhulu nesiwunqamula nya umonakalo wezimpukane zesikhunta esikoleni ukufaka ama-nematode anenzuzo abulala izinambuzane (entomopathogenic nematodes), ikakhulukazi i-Steinernema feltiae. Lezi yizikelemu eziyindilinga ezincane kakhulu, ezitholakala ngokwemvelo ezidla futhi zibhubhise izibungu zezinambuzane ezingaphansi komhlabathi ngaphandle kokulimaza abantu, izilwane ezifuywayo, izitshalo, noma imisundu:
- Xuba impuphu yama-nematode emanzini angenayo i-chlorine, ahlanzekile anezinga lokushisa legumbi ngokwemiyalelo yesipakethe yomphakeli.
- Chelela ngqo phezulu kwebhodwe ngalinye elinembobo, i-plug ye-rockwool, noma ikhala le-coco coir ngesikhathi sobumnyama noma ntambama, njengoba ukukhanya kwelanga (ultraviolet) kuwabhubhisa ngokushesha ama-nematode.
- Ama-nematode angena ngaphakathi kwezibungu zezimpukane, akhiphe amagciwane e-bacteria adla leso silokazane ngaphakathi, azalele ngaphakathi kwesidumbu, bese ephuma eyozingela ezinye izibungu ezisele. Ezinsukwini ezinhlanu kuya kweziyisikhombisa, inani lezibungu ezingaphansi komhlaba liyabhubha.
Isinyathelo 3: Ukuhlanza Izilokazane Zamaqabunga Ngensipho Ephephile Ekudleni
Izintwala zezitshalo nezibungu zolwembu zihlala emaqabungeni hhayi emthonjeni wamanzi. Ukuze uzisuse ngaphandle kwemithi enobuthi yokwenziwa, sebenzisa indlela yokuzisusa ngesandla ehambisana nensipho yangempela ye-potassium salt of fatty acids (insipho yezolimo yokubulala izinambuzane) noma insipho emsulwa ye-Castile engenamakha.
Ungalokothi usebenzise insipho yezitsha etholakala ezitolo. Izinsipho zokugeza izitsha ziqukethe izinto zokwenza amagwebu ezenziwe, izisusi zamafutha, namakha okwenziwa aklanyelwe ukukhipha amafutha, okuyizinto ezisusa ungqimba lwe-wax oluvikela amaqabunga ezitshalo eziphilayo futhi zidale ukusha kwamaqabunga ngaphansi kwezibani zokukhulisa izitshalo (grow lights).
Inqubo yenziwa ngezandla:
- Khipha izitshalo ezihlaselwe kakhulu ohlelweni bese uzisa kusinki weklasi. Geza ingaphansi lamaqabunga ngaphansi kwamanzi ompompi afudumele kancane agelezayo ukuze ususe iningi lezintwala zezitshalo nobulembu bezibungu zolwembu ngokususa ngezandla.
- Xuba insipho ewuketshezi emsulwa ye-Castile ngesilinganiso samamillilitha ayi-5 ilitha ngalinye lamanzi ebhodleleni lokufutha.
- Futha ngaphansi kwamaqabunga nasemagatsheni amaqabunga kahle kakhulu kuze kube yilapho uketshezi luvuza phansi. Insipho isebenza kuphela lapho ithinta isilokazane ngokuncibilikisa ungqimba olunamafutha oluvikela izinambuzane ezinemizimba ethambile, okwenza ziphelelwe ngamanzi futhi ziphelelwe ngumoya. Ayinabo nhlobo ubuthi obusalayo uma isiyomile.
- Linda imizuzu engamashumi amathathu, bese ufutha izitshalo ngamanzi ahlanzekile ukuze uhlanze insipho eyinsalela ngaphambi kokuzibuyisela ngaphansi kwezibani zokukhulisa izitshalo. Phinda lokhu njalo ezinsukwini ezine amasonto amabili ukuze ubambe amaphuphu amasha asanda kuchanyuselwa.
Isinyathelo 4: Qinisa Isitshalo Nge-Potassium Silicate
Uma ukugqashuka kwezilokazane sekunqandwe ngempumelelo, kumele uguqule isimo sezitshalo ukuze isilokazane esilandelayo singakwazi ukudla kalula. Amaqabunga athambile, akhula ngokushesha ngaphakathi endlini ngaphansi kwezibani ze-LED ezine-nitrogen eningi athambile futhi kulula ukuwabhoboza.
Faka isithasiselo se-potassium silicate encibilikayo emthonjeni wamanzi okunomsoco we-hydroponics njalo lapho ushintsha amanzi (ngokuvamile u-0.5 kuya ku-1 ml ilitha ngalinye, kulungiswe ngokwelebula yomkhiqizi). I-silicon igcinwa ngqo ezindongeni zamaseli esitshalo njenge-silica eqinile engenasimo esicacile (amorphous silica). Lokhu kwakha isivikelo esincane kakhulu esibonakala ngesibonakhulu ngaphakathi kwezicubu zehlamvu esiphula imilomo yezinambuzane ezibhobozayo ezifana nezintwala zezitshalo nama-thrips, okwehlisa kakhulu izinga lazo lokuzala futhi kunciphise nokungena kwamagciwane ezimpandeni.
Ukulawula Isimo Sendawo Yaseklasini
Ukubheduka kwezilokazane ezikoleni kuvamise ukubangelwa ubuthaka bemvelo obutholakala ikakhulukazi ezakhiweni zokufundisa:
| Classroom Vulnerability | Operational Consequence | Practical Correction |
|---|---|---|
| Ama-air-conditioner asebenza ngendlela yokwehlisa umswakama | Ukwanda kakhulu kwezibungu zolwembu ngenxa yomswakama ophansi | Khuphula umoya ohelezayo usebenzisa ifeni ephendukayo kunokukhipha umoya omile kakhulu; futha amaqabunga kancane ngamanzi ekuseni kakhulu. |
| Izimbobo zomthombo wamanzi ezingavaliwe noma amabhodwe angenalutho | Izimpukane zesikhunta zizalela emanzini anomsoco angagijimi | Gcina zonke izimbobo ezingasetshenziswa zimbozwe ngamakepisi amnyama epulasitiki noma nge-foil; ungalokothi ushiye amanzi anomsoco obala ekukhanyeni. |
| Ukucima kukagesi ngezimpelasonto noma ukuhamba kukagesi (load-shedding) | Amanzi amile emigelweni; ukucindezeleka nokufa kwezimpande | Qinisekisa ukuthi amasistimu anamazinga anele amanzi aphumayo ukuze izimpande zihlale zinomswakama ngaphandle kokucwila emanzini angenamoya. |
| Amaholide esikole angenakubhekwa kwezitshalo | Amanzi asemithonjeni ayancipha, okucindezela izimpande futhi kuhehe izilokazane | Gwalisa futhi ulinganise ukuhamba kukagesi emanzini (conductivity) ngaphambi kwamakhefu; vala zonke izimbobo zomoya bese uvala izivalo zokuhlola imithombo yamanzi. |
Uma umisa noma uthuthukisa indawo yokutshala yesikole sakho, ukukhetha uhlaka lwaseklasini oluvaliwe nolwakhelwe le njongo njengalawo asohlwini lwethu lwe-hydroponics collection kuqeda eziningi zalezi zinkinga kusukela osukwini lokuqala ngokuhlanganisa imisele yezimpande evalwe ngci, izivalo zemithombo yamanzi ezifakwe kahle, namaphampu azinzile ajikelezisa amanzi avimbela izindawo ezinomswakama osobala lapho izilokazane ziqala khona.
Awuwadingi amakhemikhali anobuthi ukuze uqhube isistimu yokutshala ehlanzekile nekhiqizayo eklasini. Ngokuvala ngokomzimba okuyisisekelo, ama-nematode okubulala izinambuzane endaweni yezimpande, kanye nezinsipho eziphephile ezithinta amaqabunga, ungalawula izinambuzane hhayi njengenkinga eyingozi yezinto eziphilayo (biohazard), kodwa njengesifundo sebhayoloji esetshenziswayo abafundi abangaziphathela sona ngokuphepha.
