Ukushisa okwedlulele esifundazweni saseCanada eBritish Columbia kuyaqhubeka. Nakuba izitshalo zingaphila emazingeni okushisa angaphezu kuka-30 degrees Celsius, akulula kubalimi nasezitshalweni zabo. “Izinga lokushisa eliphakeme amahora angu-24 likwenza kube nzima kakhulu,” kusho uCasey Houweling weHouweling Tomatoes.
Cishe sekuyiminyaka eyi-10 inkampani yaqanjwa ngokuthi i-Houweling's Group esikhundleni se-Houweling's Hot House, kodwa okwamanje i-Delta ka-Casey Houweling, i-British Columbia greenhouse nakanjani izizwa “ishisa” kakhulu futhi. Isifundazwe sihlushwa igagasi lokushisa elidlulele: iziqongo zasemini zingafinyelela ku-33-43 degrees, amarekhodi okushisa aphulwa. “Sibone izinga lokushisa e-greenhouse likhuphuka lingaphezu kuka-34 degrees. Uma lokho kuwusuku olulodwa noma ezimbili singakuthwala lokho, kodwa izinga lokushisa lamahora angu-24 okwenza kube nzima kithina,” kusho uCasey. Ebusuku izinga lokushisa lehla liye ku-18 - 21 degrees Celsius, okuphakeme kakhulu esifundeni.
"Umphumela wesimo sezulu uncike esigabeni sokutshala," kuqhuba uCasey. “Utamatisi uzophumelela, kodwa siphinde satshala ama-cucumber. Basanda kuphuma ekusakazweni futhi manje babhekene nobunzima ngempela.”
Uphahla olucakiwe
Nezinkampani eziseCamarillo (California), Mona (Utah) naseDelta (British Columbia), ithimba likaHouwelings lijwayele ukukhula ezimweni zezulu ezihlukene. Ngesexwayiso esifike ngesikhathi mayelana nesimo sezulu esishisayo kakhulu, u-Casey uyaqiniseka ukuthi abalimi banikeze uphahla olucakiwe ukuze banciphise izinga lokushisa. "Kule ndawo sijwayele ukukhanya okuphezulu kakhulu: siseningizimu kakhulu kunaseNetherlands, isibonelo, futhi sifinyelela kalula ku-1000W. Abalimi bezitshalo ezizwelayo njengopelepele bafaka ama-greenhouse abo ukuze banciphise ukukhanya kwelanga nokushisa okukhazimulayo. Abalimi bakatamatisi ngokuvamile bayakwenza lokho. hhayi, kodwa ngalesi simo sezulu ngokuqinisekile uyakufuna."
Amazinga okushisa kungenzeka ehle futhi ngokuhamba kwesikhathi kuleli sonto. “Uma umoya uphenduka futhi ubuya olwandle, sizobuyela ku-23-24 degrees noma ngaphansi,” kusho uCasey. “Ngokuvamile kupholile ezinsukwini ezimbili kuya kwezingu-2 ngaphambili lapha kunase-Upper Fraser Valley, lapho kunezindawo zokugcina izithombo eziningi. Sizobona, ezinsukwini ezi-3 noma ezi-2."
Ngokwesibonelo, a izinga lokushisa irekhodi 49.5 degrees Celsius kwaba irekhodiwe izolo . Ngakho juluka kakhulu.