Ifilimu ye-multi-span greenhouse yenye yezona zinto zisetyenziswa kakhulu kwi-greenhouse kwimveliso yezolimo, kwaye ukusetyenziswa kwayo kwemihla ngemihla kususela kwii-arches zemveli ezisemhlabeni, ii-greenhouses zokukhanya kwelanga, ii-double-side-sided slope greenhouses, i-multi-span film greenhouses, kunye ne-fungus greenhouses. Ngoko abalimi bezolimo kufuneka bakhethe njani ifilimu ye-greenhouse efanelekileyo xa besenza imveliso yezolimo, namhlanje ndiya kukunika isingeniso esifutshane kunye nokwabelana.
Inqanaba lophuhliso lwefilimu ye-greenhouse Okwangoku, ukwakhiwa kwemveliso yefilimu ye-greenhouse kufuneka kuphuhliswe kwi-multi-layer composite, kwaye ukusebenza kudla ngokugqithisa ukukhanya okuphezulu, ukugcinwa kobushushu obuphezulu, amandla aphezulu, ubomi obude kunye nexesha eliqhubekayo lokuthontsiza, ixesha anti-inkungu, ixesha uthuli, kunye neminye imisebenzi. Uphuhliso oludibeneyo. Ukuphuhliswa kwefilimu ye-greenhouse ngokuqhelekileyo kudlule izigaba ezine ngokwezinto ezahlukeneyo zokuvelisa: eyokuqala yifilimu ye-polyethylene (PE) eluhlaza; okwesibini yifilimu ye-polyvinyl chloride (PVC) eluhlaza; eyesithathu ifilimu ye-greenhouse ethylene-vinyl acetate copolymer (EVA); eyesine yifilimu ye-PO, kunye nesizukulwana sesihlanu ifilimu edibeneyo ekhutshwe phantsi kophuhliso.
Iimpawu eziphambili kunye nokwahlukana kweefilimu ezahlukeneyo ze-greenhouse:
1. I-PVC (i-polyvinyl chloride) ifilimu ye-greenhouse. Olu hlobo lwefilimu lunokuhanjiswa kokukhanya okulungileyo, ifilimu entsha inokuhanjiswa kokukhanya okungaphezulu kwe-85%, ukugcinwa kokufuma okugqwesileyo, ukuhanjiswa kwe-thermal ephantsi, amandla aphezulu, kunye nokumelana nomoya onamandla. Uzinzo oluhle lweekhemikhali, i-asidi kunye nokumelana ne-alkali. Ukungalungi kukuba ifilimu inomlinganiselo omkhulu, kunye nokusetyenziswa kwendawo efanayoi-greenhouse yi-1/3 ngaphezu kwe-polyethylene, okubangelwa ukunyuka kweendleko; okwesibini, iba nzima kwaye i-brittle kwiqondo lokushisa eliphantsi, kwaye kulula ukuthambisa nokuphumla kwiqondo lokushisa eliphezulu; emva kokuba izongezo zincitshisiwe, umphezulu wefilimu Ukuqokelela uthuli, ukuhanjiswa kokukhanya kubi kakhulu emva kwenyanga enye yokusetyenziswa. Ifilimu eshiyekileyo ingcolisa umhlaba kwaye ayinakutshiswa. Ngenxa yokungcoliseka kwendalo okubangelwa kukuveliswa kweklorini, ukusetyenziswa kwangoku kuyehla ngokuthe ngcembe.
2. Ifilimu ye-PE greenhouse.Ifilimu ye-PE greenhouseilula, ithambile, ilula ukumila, ilungile ekuhanjisweni kokukhanya, ayinatyhefu, ilungele iifilimu ezahlukeneyo zegreenhouse kunye neefilim zokugquma, kwaye ngoku lolona didi lwefilim lwezolimo kwilizwe lam. Ngokweemfuno zamafama, iintlobo ezahlukeneyo zeemveliso ezifana ne-PE anti-aging (uthintelo olunye), i-PE anti-aging dripping (uthintelo oluphindwe kabini), i-PE anti-aging dripping anti-fogging (ezintathu zokuchasa inkungu) zinokuveliswa, kunye elungileyo anti-ukuguga kunye drip anti-inkungu ngesondo. Ukungalungi kwayo zezi: ukunganyangeki kwemozulu, ukungakhuseleki kakuhle kobushushu, kunye nobunzima bokudibanisa. Umphathi weNgoma ufundile ukuba ifilimu ye-PE grouting isetyenziswa kakhulu kwintengiso.
3. Ifilimu ye-grouting icutshungulwa kwakhona ngesiseko sefilimu ye-polyethylene yasekuqaleni, kwaye indawo yangaphakathi yefilimu yezolimo iphathwa ngokutyabeka, ukwenzela ukuba ifilimu ephathwayo ibe ne-agent esebenzayo yokudonsa i-antifogging ifakwe ngokuqinileyo kuyo. Kudonga lwangaphakathi lwefilimu yokuchithwa, uluhlu lweziyobisi lwenziwa kwindawo yangaphakathi yefilimu yokuchithwa. Ngokukhawuleza ukuba ukufuma kwishedi kuthinte udonga lwangaphakathi lwefilimu yokuchitha, ifilimu yamanzi iya kwenziwa, kwaye iya kuhamba ihla ngethambeka leshedi ngenxa yobunzima bayo, ukuze kuphunyezwe umphumo wokuphelisa. inkungu kunye nokuvuza. Umahluko obalulekileyo kunye nefilimu yangaphambili ye-greenhouse kukuba i-agent esebenzayo ikhona ngokuzimeleyo kwifilimu ye-greenhouse, ngoko ixesha lokuchasana ne-fogging kunye ne-dripping imisebenzi lixhomekeke ngokupheleleyo kulawulo lwenkqubo yokwaleka, umgangatho we-agent yokwambathisa kunye nokusetyenziswa ifilimu yezolimo. Ubomi bunokufikelela ngokubanzi ngaphezu konyaka omnye.
Kanjalo,ifilimu yokucocakananjalo ineziphene zomntu ngamnye. Okokuqala, i-anti-fog dripping agent ifakwe kumphezulu wefilimu yezolimo, ngoko ke ukubambelela kwayo akunamandla kangako. Amandla angaphandle kulula ukwenza umonakalo kwi-coating, ukwenzela ukuba kube lula ukubangela ukuvuza kwindawo eyonakalisiweyo. Ngokomzekelo, xa ishedi, ukungqubana phakathi kodonga lwangaphakathi lweshedi kunye neepali ze-bamboo kwishedi, imeko ekhankanywe ngasentla iya kwenzeka xa izityalo eziphezulu zidibana nefilimu yezolimo. Ngexesha elifanayo, akulula ukusebenzisa ifilimu ye-grout kwizityalo ezithanda ukushisa okuphezulu kunye nomswakama, njengekhukhamba, i-gourd ekrakra, i-melon kunye nokunye. Noko ke, iintsilelo aziyifihli inyaniso. Nokuba le meko ingentla iyenzeka, isiphumo esipheleleyo sefilimu yezolimo isabonakala ngakumbi kunefilimu yemveli yezolimo. Ngenxa yokuba le mveliso ineengenelo ezicacileyo ekupheliseni inkungu kunye nokuthontsiza, kwaye ixabiso liphantsi ngokwentelekiso, limalunga ne-1.1-1.2 yuan kwi-square meter nganye. Xa kuthelekiswa nexabiso lefilimu ye-EVA, ixabiso lokufakwayo liphantsi, ngoko lithandwa ngamafama amaninzi emifuno. Ifilimu yangoku ye-grouting iyahluka kumgangatho wemveliso ngenxa yamanqanaba ahlukeneyo okuzalisa. Abalimi bemifuno kufuneka benze uhlolo oluphindaphindiweyo kwimveliso nganye xa bethenga kwaye bakhethe inkampani esesikweni abanokuthenga.
4. Ifilimu ye-Eva.Ifilimu ye-EVA greenhouseluhlobo lwefilimu yeplastiki yegreenhouse esetyenziswa ngoku ngamanani amakhulu. Olu hlobo lwefilimu lunokuhanjiswa kokukhanya okuphezulu, kunye nokuhanjiswa kokukhanya okungaphezulu kwe-92%; ineempawu ezibalaseleyo zokuchasana nenkungu, kwaye ixesha lokuthontsiza li-4- Ngaphezu kweenyanga ezi-6; inokugcina ubushushu obugqwesileyo, ukuxhathisa uthuli kunye nokumelana nokuguga okukhulu (ngaphezu kweenyanga ezili-18). Ifilimu ye-EVA enemigangatho emithathu ingasetyenziselwa ngokubanzi ukuvelisa imifuno ephezulu yoqoqosho olungenangcoliseko, efana nekhukhamba, itumato, ipepile, ukhukhamba okrakra, njl njl. Ububi kukuba ixabiso liphezulu. Ngokweenkcazo ezahlukeneyo zobukhulu, ixabiso lemarike langoku: 0.08 mm ngokubanzi yi-2.05-2.1 yuan / imitha yesikwere, kunye ne-0.09 mm yi-2.15-2.2 yuan / imitha yesikwere.
5. Ifilimu ye-PO ikwaluhlobo olutsha lwefilimu ephuhliswe kwiminyaka yakutshanje. Olu hlobo lwefilimu yifilimu yezolimo ye-polyolefin ephezulu esebenzayo eveliswe kwi-polyolefin. Inokuhambisa ukukhanya, ukuchasa inkungu ngokuqhubekayo, ukuthontsiza kunye nokugcina ubushushu. Njl., ikwindawo ephambili phakathi kweefilimu zegreenhouse, ezinexabiso eliphezulu lokusebenza, kwaye lolona hlobo luthembisayo lwefilimu. Ubukhulu bangoku befilimu ye-po busukela kwi-8 imicu, i-12 filaments, kunye ne-15 filaments.
