Ingaba Izikolo Zingazisebenzisa Na Izichumiso Ezomileyo Zasebunkcenxeni (Hydroponics)? Indlela Yokuxuba Umgubo Ngaphandle Kokuvimba Imibhobho
Izikolo zinganciphisa kakhulu iindleko zezichumiso zasebunkcenxeni (hydroponic nutrients) ngokusebenzisa iityuwa ezomileyo, ukuba nje zohlula ikhalsiyam exineneyo kwiifosfeyithi neesalfeyithi ukunqanda intlenga evalela imibhobho.
Ewe, izikolo zingasebenzisa ngokukhuselekileyo nangempumelelo imigubo yezichumiso eyomileyo endaweni yezichumiso ezingamanzi esele zixutyiwe ze-hydroponics. Ngokwesiko, iityuwa zeminerali ezomileyo zisemgangathweni kwezolimo lwezorhwebo ngenxa yokuba izichumiso ezingamanzi ziziityuwa ezomileyo nje ezinyibilikiswe emanzini zaza zathengiswa ngamaxabiso aphakamileyo kakhulu ezivenkileni. Nangona kunjalo, ukusebenzisa izichumiso ezomileyo kufuna umthetho omnye wekhemistri ongatshintshiyo: akufuneki nangephanyazo udibanise ikhalsiyam exineneyo kunye neefosfeyithi okanye iisalfeyithi ezixineneyo kwisikhongozeli esinye.
Ubalo Lweendleko: Izichumiso Ezingamanzi Xa Zithelekiswa NeeTyuwa Ezomileyo
Izichumiso ezingamanzi ezixutywe kwangaphambili zilungele abantu abazenzela izinto zokuzonwabisa abaneekhithi ezincinci zezityalo phezu kwedesika, kodwa azinangqondo ngokwezimali kwimeko yesikolo. Izichumiso ezingamanzi zine-80% ukuya kwi-90% yamanzi. Xa isikolo si-odola iibhotile zezichumiso ezingamanzi, inxalenye enkulu yohlahlo lwabiwo-mali iya ekuthuthweni kwamanzi etephu asebhotileni, ukupakishwa ngeplastiki, kunye namaxabiso aphezulu eebhrendi.
Iityuwa ezomileyo ze-hydroponics—ngokuqhelekileyo ezithengwa njengenkqubo eneenxalenye ezininzi (ezifana ne-Calcium Nitrate, i-Potassium Nitrate, i-Monopotassium Phosphate, kunye ne-Magnesium Sulphate eneziqalelo ezincinci ezi-chelated)—zihlala ixesha elingasikelwanga mda ukuba zigcinwe zomile kwaye zivaliwe ngci. Ingxowa ye-5 kg yesichumiso esisisiseko esomileyo ivamise ukuvelisa amawaka eelitha zesisombululo sesichumiso esisebenzayo ngeqhezu leendleko ngelitha nganye yezichumiso ezingamanzi ezixineneyo. Kwisikolo esisebenzisa imisele ye-NFT yaseklasini, i-Dutch buckets, okanye iinqaba ezizisebenzelayo ezimileyo (automated vertical towers), imali eyongiwayo ngonyaka ikhawuleza ihlawulele iindleko zepeni yedijithali ye-EC/pH kunye nesikali sasekhitshini sedijithali.
Ikhemistri Yokuvimbana: Isizathu Sokwenzeka Kweentlenga
Eyona ngxaki ixhaphakileyo xa ootitshala okanye abafundi betshintshela kwiityuwa ezomileyo zizikhonkwane zokuthontsiza (dripper stakes) ezivalekileyo, imibhobho emincinci encamatheleyo, kunye nee-impeller zeempompo ezingaphantsi kwamanzi (submersible pumps) ezibambekayo. Oku kwenzeka ngenxa yentshukumo esisiseko yokunyibilika kweekhemikhali:
- Calcium Nitrate ibonelela ngekhalsiyam ebalulekileyo ($Ca^{2+}$) nenitrogen yenitrate ($NO_3^-$).
- Iityuwa zeFosfeyithi neSalfeyithi (ezifana ne-Monopotassium Phosphate kunye ne-Magnesium Sulphate) zibonelela ngephosphorus ($H_2PO_4^-$) nesalfure ($SO_4^{2-}$).
Xa ii-ion zekhalsiyam zidibana nee-ion zesalfeyithi okanye zefosfeyithi kuxinano oluphezulu, zisabela ngokukhawuleza okukhulu ukwenza iikhompawundi ezinganyibilikiyo: i-Calcium Sulphate (igypse) kunye ne-Calcium Phosphate. Ezi khompawundi zenza intlenga emhlophe enjengewayitshokhwe nenesanti engaphinde inyibilike emanzini, nokuba itanki igxojwa ngamandla kangakanani na. Xa le santana itsalwe yimpompo yokunkcenkceshela, ihlala kwezona ndawo zincinci kumbhobho wakho: imibhobho yokutya ye-4 mm, iincam zokutshiza (spray nozzles), kunye nezithontsizi ezilungelelanisa uxinzelelo (pressure-compensating drippers).
Isisombululo: Indlela Ye-Stock Concentrate Yeenxalenye Ezimbini
Kwezolimo lwezorhwebo nakwiilabhoratri zezikolo ngokufanayo, izichumiso ezomileyo zisingathwa kusetyenziswa inkqubo ye-stock yeenxalenye ezimbini “A no-B”. Endaweni yokugalela imigubo eyomileyo ngqo kwitanki enkulu yamanzi ngaphandle kokulandelelanisa, uxuba izisombululo ezimbini ezingamanzi ezixineneyo (stock solutions) ezahlukeneyo kwiikaribhoyi (carboys) okanye kumakhonkxathi ahlukileyo:
| ITanki Ye-Stock A (ITanki YeKhalsiyam) | ITanki Ye-Stock B (ITanki YeFosfeyithi NeSalfeyithi) |
|---|---|
| Calcium Nitrate | Potassium Nitrate |
| Iron Chelate (EDTA, DTPA, okanye EDDHA) | Monopotassium Phosphate |
| Inxalenye ye-Potassium Nitrate (Ukuba Uyafuna) | Magnesium Sulphate (Ityuwa Ye-Epsom) |
| Iziqalelo Ezincinci (Trace Elements: Zinc, Boron, Manganese, Copper, Molybdite) |
Kuba iKhalsiyam ekwiTanki A kunye neeSalfeyithi/iiFosfeyithi ezikwiTanki B zigcinwa zahlukene ngokwasemzimbeni ngeli xesha zixineneyo, akukho ntlenga yenzekayo. I-ayoni ene-chelate ifakwa kwiTanki A ngenxa yokuba uxinano oluphezulu lwefosfeyithi kwiTanki B lunokubangela ukuba i-ayoni iphume kwisisombululo ize yenze intlenga.
Inkqubo Yokuxuba Ye-Reservoir Yenyathelo Ngenyathelo
Xa lifikile ixesha lokufaka izichumiso kwi-reservoir yakho enkulu ye-hydroponics, landela olu luhlu ngokuchanekileyo:
- Qala ngokuzalisa i-reservoir ngamanzi. Ungaze ufake izichumiso ezixineneyo kwitanki engenanto okanye ephantse ingabi nanto. Zalisa i-reservoir ubuncinane kwi-80% yomthamo wayo ojoliswe kuwo ngamanzi acocekileyo etephu.
- Faka iTanki A (okanye iNxalenye A eyomileyo) uze uyinyibilikise ngokupheleleyo. Faka isichumiso sakho esixineneyo seNxalenye A kumanzi amaninzi e-reservoir. Gxobha ngamandla ide ixubane ngokupheleleyo kuwo onke amanzi. Ngenxa yokuba ii-ion zekhalsiyam ngoku zixutywe kumanzi amaninzi aneelitha ezininzi, zikude kakhulu omnye komnye ukuba zingancoma intlenga kwangoko.
- Faka iTanki B (okanye iNxalenye B eyomileyo) uze ugxobhe. Faka isichumiso sakho esixineneyo seNxalenye B kwitanki esele ixutyiwe. Ii-ion zefosfeyithi nezesalfeyithi zisasazeka ngokukhuselekileyo ngaphandle kokubambana nekhalsiyam.
- Zalisa ukuvala umthamo, jikelezisa, uze ulinganise. Galela amanzi aseleyo ukufezekisa umthamo, sebenzisa impompo engaphantsi kwamanzi kangangemizuzu emi-5 ukuya kweli-10 ukuxuba umxube ngokulinganayo, uze ulinganise ukuqhuba kombane (EC) kunye ne-pH. Lungisa i-pH (ujolise kwi-5.8–6.2 kwizityalo ezininzi) kuphela emva kokuba zonke izichumiso zinyibilike ngokupheleleyo.
Izikhuseli Zehardware Ze-Hydroponics Ezikolweni
Nokuba kuxutywe ngononophelo, iinkqubo zezikolo zijongana nemingcipheko yokwenyani: intlenga enjengewayitshokhwe evela emanzini alukhuni kamasipala, inkunkuma yeengcambu zezityalo, okanye ukutshisa kwamanzi okungajongwanga ngeempelaveki ezishushu nangamaxesha eeholide zezikolo. Ukukhusela inkqubo yakho, sebenzisa le mithetho mithathu ilula:
- Fakela isihluzi sediskhi okanye sesikrini se-120-mesh kumbhobho ohambisa amanzi ngoko nangoko emva kwempompo engaphantsi kwamanzi. Ukuba kwenzeka intlenga ngempazamo okanye i-biofilm, ibanjwa kwisikhongozeli sesihluzi endaweni yokuvala izikhonkwane zokuthontsiza ezingamashumi amabini ngaphakathi kumsele.
- Qwalasela ukuma kweempompo ngenxa yocinyo-mbane (load-shedding). EMzantsi Afrika, ukucinywa kombane okungalindelekanga okanye amanqanaba e-load-shedding amisa iimpompo ezingaphantsi kwamanzi. Ukuba isisombululo esigqithiseleyo okanye esingaxutywanga kakuhle sihlala singahambi kwimibhobho emincinci ye-4 mm phantsi kweemeko ze-greenhouse ezishushu, amanzi ayatsha kwaye iityuwa ziba ngamakristale ngaphakathi kumbhobho. Qinisekisa ukuba umbhobho wakho omkhulu wokuhambisa amanzi ubuncinane uyi-13 mm ukuya kwi-15 mm kwaye unezikepisi zokuphela ezisuswa lula ukuze ugungxulwe amaxesha ngamaxesha.
- Ungaze uxube imigubo ngqo kwitanki ngaphandle kwe-emele yokunyibilikisa. Ukuba awugcini izichumiso ezixineneyo ezingamanzi kwaye ukhetha ukusebenzisa umgubo owomileyo ngqo, soloko unyibilikisa ityuwa nganye elinganisiweyo ngokupheleleyo kwi-emele eyahlukileyo yeelitha ezi-5 yamanzi adikidiki ngaphambi kokuba uyigalele kwi-reservoir.
Ukuba wakha inkqubo yesikolo ezisebenzelayo eneempompo zokulinganisa (dosing pumps) kunye nokubek' iliso nge-IoT, phonononga iidayilo zenzwa (sensors) ezimodyula kunye nezokunkcenkceshela kwizixhobo zethu zekharityhulam ye-hydroponic, ezakhelwe kwezi ndlela ziqhelekileyo zezolimo.
