Ukusetshenziswa Kahle Kwamanzi Ekufuyeni Izinhlanzi
Ukusebenza kahle kwamanzi ekulimeni izinhlanzi sekuba yinkinga ebaluleke kakhulu ngenxa yokwanda kwesidingo sokudla, ukuguquka kwesimo sezulu, kanye nokucindezelwa kwemithombo yamanzi ahlanzekile. Ukulimeni izinhlanzi kuvame ukubhekwa "njengokonga" kakhulu kunezinye izinhlobo zokukhiqizwa kwamaprotheni ezilwane, kodwa umkhuba wasensimini ubonisa ukuthi ukusetshenziswa kwamanzi kungaba ukuchitha imali uma uhlelo lokulima lungaklanywanga kahle. Ngakho-ke, ukusebenza kahle kwamanzi akukhona nje ukonga izindleko, kodwa futhi kuyindlela yokugcina ukuzinza kwemvelo nokuqinisekisa ukuzinza kwesikhathi eside kwemisebenzi yokufuya izinhlanzi.
Kungani ukusebenza kahle kwamanzi kubalulekile?
Amanzi emapulazini ezinhlanzi awasebenzi nje kuphela njengendawo yokuphila kodwa futhi "njengohlelo lokuthutha" lwe-oxygen, ukudla, kanye nokususwa kwemfucuza ye-metabolic efana ne-ammonia ne-nitrite. Ikhwalithi yamanzi engeyinhle izonciphisa ukukhula, yandise ukucindezeleka, ibangele ukuqubuka kwezifo, futhi ibangele nokufa kwabantu abaningi. Ngaphezu kwalokho, ukushintsha kwamanzi njalo ngaphandle kokucatshangelwa ngokucophelela kungandisa izindleko zikagesi (zamaphampu), izindleko zokwelashwa kwamanzi, futhi kungangcolisa imvelo uma amanzi angcolile equkethe ukudla okusele kanye nendle.
Ezindaweni lapho kutholakala khona amanzi ngezikhathi ezithile noma lapho ukulima kuncintisana nezidingo zasekhaya nezezolimo, ukusetshenziswa kwamanzi ngendlela efanele kubalulekile futhi ekuqhubekeni kwebhizinisi. Abalimi abangakhiqiza izinhlanzi ngamanzi amancane ngokuvamile bayakwazi ukumelana nesomiso kanye nokushintshashintsha kokunikezwa.
Imithombo yamanzi angcolile ekulimeni izinhlanzi
Ukungcola kwamanzi kuvame ukwenzeka ngenxa yezimbangela eziningana ezivamile. Okokuqala, ukuphathwa kabi kokudla. Ukudla okulahliwe ngokweqile kuzobola futhi konakalise ikhwalithi yamanzi, kuphoqe abalimi ukuba bashintshe amanzi kaningi. Okwesibili, ubuningi bamanzi angahambisani namandla esistimu. Ubuningi obukhulu ngaphandle komoya owanele kanye nokuhlunga kubangela amazinga e-ammonia akhuphuke ngokushesha. Okwesithathu, ukwakheka kwechibi/ikheji okungafanele: ukuvuza, ukungena nokuphuma okungalawulwa, noma ukungabikho kohlelo lokujikeleza kwamanzi. Okwesine, ukuthembela ohlelweni lokugeleza okuqhubekayo (ukugeleza) ngaphandle kokwelashwa kwemfucuza. Lezi zinhlelo kulula ukuzisebenzisa kodwa zingadinga amanzi amaningi.
Ukuqonda imithombo yemfucuza kusiza abalimi ukuthi banqume amasu okusebenza kahle afanele kakhulu, ngoba akuyona yonke imizamo edinga ubuchwepheshe obubizayo—ngokuvamile ukuthuthukiswa okulula kungaba nomthelela omkhulu.
Amasu okuthuthukisa ukusebenza kahle kwamanzi: kusukela kokulula kuya kokujulile
1) Ukuphathwa kokuphakelayo okunembile
Ukudla okuphakelayo kuyisici esikhulu sezindleko ekulimeni izinhlanzi futhi kuyimbangela enkulu yokwehla kwekhwalithi yamanzi. Ukudla okuphakelayo kufanele kulungiselelwe usayizi wezinhlanzi, izinga lokushisa, uhlobo lokuphakelayo, kanye nesifiso sokudla sansuku zonke. Umkhuba ovamile ukudla kancane kancane (ukudla okuhlukanisiwe) ngenkathi ubheka izimpendulo zokudla. Ukusebenzisa amathileyi okuphakelayo ezinhlanzini ezithile noma ukuqapha izindawo zokuqoqa izinhlanzi kunganciphisa imfucuza yokudla.
Abalimi abathuthuke kakhulu bangasebenzisa iziphakeli ezizenzakalelayo ezinezibali-sikhathi noma izinzwa. Nakuba ukutshalwa kwezimali kokuqala kuphakeme, ukonga ukudla kanye nekhwalithi yamanzi ezinzile kuvame ukuqeda izindleko. Uma ukudla kungachithwa kakhulu, kudingeka izinguquko zamanzi ezingavamile.
2) Umoya omuhle kanye nokujikeleza kwegazi
Abalimi abaningi bashintsha amanzi ngoba izinhlanzi zibonakala sengathi ziyaphefumula noma ikhwalithi yamanzi iyehla. Kodwa-ke, inkinga ivame ukuntuleka komoya-mpilo oncibilikisiwe kanye nokuqongelela kwamagesi anobuthi. Umoya-mpilo (amasondo, ama-blower, ama-rock aerator) kwandisa umoya-mpilo futhi kusiza amabhaktheriya anika i-nitrogen ukuthi asebenze kahle kakhulu. Ukugeleza kwamanzi okuhle kuvimbela nezindawo "ezifile" phansi kwechibi, lapho kuqongelela khona udaka oluphilayo.
Ngomoya owanele, abalimi bangagcina ikhwalithi yamanzi isikhathi eside ngaphandle kokuchitha amanzi amaningi.
3) Ukuphathwa kwemfucuza eqinile
Imfucuza yezinhlanzi kanye nokudla okusele kwakha izinto eziqinile ezilengayo kanye nendle. Uma ingelashwa, le nto ephilayo izobola ibe yi-ammonia futhi idle umoya-mpilo. Izindlela ezilula zokuphatha imfucuza eqinile emachibini zifaka phakathi ukufuthwa njalo kwamachibi noma amathangi e-tarpaulin phansi, kanye nokusebenzisa amachibi okufaka indle ngaphambi kokukhulula amanzi endaweni ezungezile.
Ezinhlelweni eziqinile, izihlungi zemishini ezifana nezihlungi zemigqomo noma izihlungi zesikrini zingasusa izinhlayiya ngaphambi kokuba amanzi abuyele echibini. Ngokususa izinto eziqinile kusenesikhathi, umthwalo wezinto eziphilayo uyancipha futhi isidingo sokushintsha amanzi siyancipha.
4) Indlela yokuhlunga nge-biofilter kanye nokujikeleza kwegazi (i-RAS)
Uhlelo Lokulima Izinhlanzi Olusebenzisa Kabusha (i-RAS) luwubuchwepheshe bokusebenzisa amanzi obusebenza kahle kakhulu. Isimiso siwukuthi amanzi aphinde asetshenziswe ngochungechunge lwezihlungi zemishini nezebhayoloji (ama-biofilter) ukuguqula i-ammonia ibe ama-nitrite aphephile bese kuba ama-nitrate. I-RAS ivumela ukutshalwa kwezitshalo ukuthi kwenziwe ngokushintsha okuncane kwamanzi, ngezinye izikhathi ukuze kulungiswe ukulahlekelwa okubangelwa ukuhwamuka noma ukususwa kodaka.
Kodwa-ke, i-RAS idinga ukuphathwa kobuchwepheshe okuqinile: ukulawulwa komoya-mpilo, i-pH, i-alkalinity, izinga lokushisa, kanye nokuhlanzeka kwe-biofilter. Ukutshalwa kwezimali emishinini—amaphampu, umoya, izihlungi ze-bio, i-UV noma i-ozone (ongakukhetha)—nakho kuphakeme. Ngakho-ke, i-RAS ifanelekela izimpahla zenani eliphezulu noma izindawo ezinokuntuleka kwamanzi okukhulu.
5) Uhlelo lwe-Biofloc: ukusebenzisa amagciwane “njengezihlanzi”
I-Biofloc iyindlela esebenzisa imiphakathi yamagciwane ukuze ifake i-nitrogen (i-ammonia) ibe yi-biomass yamagciwane ngokulawula isilinganiso se-carbon-to-nitrogen (C/N). Ngomoya onamandla kanye nokwengezwa komthombo we-carbon (isb., ama-molasses), amagciwane akhula abe ama-floc angadliwa yizinhlobo eziningana zezinhlanzi nama-shrimp, kuyilapho egcina ikhwalithi yamanzi.
Izinzuzo ze-biofloc zifaka phakathi izidingo zokushintshana kwamanzi ezincishisiwe kanye nokusebenza kahle kokudla okungenzeka kuthuthukiswe. Kodwa-ke, lolu hlelo ludinga ukuqapha ngokucophelela, ikakhulukazi maqondana nokungena komoya, izinto eziqinile ezimisiwe, kanye nokuqina kwe-pH. Uma amazinga ezinto eziqinile ephezulu kakhulu, ikhwalithi yamanzi izowohloka ngempela.
6) Ukuhlanganiswa nezitshalo (ama-aquaponics)
Ama-aquaponics ahlanganisa ukufuya izinhlanzi nama-hydroponics. Amabhaktheriya aguqula izakhamzimba ezivela emfucumfucwini yezinhlanzi zibe uhlobo izitshalo ezingalumunca. Izitshalo bese zisiza ekuhlanzeni amanzi ngaphambi kokuwabuyisela echibini lezinhlanzi. Lolu hlelo lungaba wusizo kakhulu emanzini ngoba lunciphisa amanzi angcolile futhi lukhiqiza izinto ezimbili ngesikhathi esisodwa: izinhlanzi nemifino.
Kodwa-ke, i-aquaponics idinga ibhalansi ebucayi phakathi kwezidingo zezinhlanzi nezitshalo. Akuzona zonke izitshalo ezifanele, futhi akuzona zonke izilinganiso zebhizinisi ezihlanganiswa kalula. Noma kunjalo, emakhaya nasemabhizinisini amancane kuya kwaphakathi, i-aquaponics ivame ukuba yindlela ekhangayo.
Ukulinganisa: isihluthulelo sokusebenza kahle kwangempela
Ukusebenza kahle kwamanzi akukwazi ukulinganiselwa kuphela. Abalimi kudingeka balinganise njalo imingcele ebalulekile, njenge:
– I-oxygen encibilikisiwe (DO)
- pH
- Izinga lokushisa
– I-Ammonia (NH3/NH4+), i-nitrite (NO2-), kanye ne-nitrate (NO3-)
– Ukuvuthuluka noma izinto eziqinile ezilengayo
Amarekhodi ansuku zonke asiza ekuboneni amaphethini: isibonelo, i-ammonia ikhuphuka ngemva kokushintsha kohlobo lokuphakelayo, noma i-DO yehla ekuseni. Ngedatha, isinyathelo sokulungisa singathathwa ngokushesha ngaphandle kokudinga ushintsho olukhulu lwamanzi.
Ukuphathwa kwamanzi angcolile ukuze kungangcoliswa imvelo
Ukusebenza kahle akusho ukuthi ungalinge uchithe amanzi, kodwa kunalokho uwakhiphe ngokuhlakanipha nangokuzibophezela. Amanzi angcolile acebile ngezinto eziphilayo angabangela ukugcwala kwamanzi emifuleni noma emachibini, abangele ukuqhakaza kwe-algal, futhi anciphise amazinga omoya-mpilo ezilwaneni zasendle. Imikhuba enconywayo ifaka phakathi ukuhlanza amachibi, izihlungi ezilula, noma ukusebenzisa izindawo ezimanzi ezakhiwe ukunciphisa imithwalo yezakhamzimba ngaphambi kokuba amanzi akhishwe. Ngaphezu kokuthuthukisa imiphumela yemvelo, ukwelashwa kwamanzi angcolile kunciphisa nengozi yezingxabano nemiphakathi ezungezile.
Isiphetho
Ukusebenza kahle kwamanzi ekulimeni izinhlanzi kuyinhlanganisela yokuphathwa kahle kokudla, ukulawulwa kwekhwalithi yamanzi, ukuphathwa kwemfucuza, nokukhetha uhlelo lokulima olufanele. Izinyathelo ezilula njengokunciphisa ukumosheka kokudla, ukuthuthukisa umoya, kanye nokususa indle kunganciphisa kakhulu isidingo sokushintsha kwamanzi. Ukuze kufuywe kakhulu, ubuchwepheshe obufana ne-RAS, i-biofloc, kanye ne-aquaponics bunikeza ukusebenza kahle kwamanzi okuphezulu, yize kudinga ikhono elikhulu kanye nokutshalwa kwezimali. Ekugcineni, abalimi ababeka phambili ukusebenza kahle kwamanzi abagcini nje ngokulondoloza imali kodwa futhi bakhe amabhizinisi aqinile ezinkingeni zamanzi futhi anobungani nemvelo.
Uma ufisa, ngingavumelanisa lesi sihloko nezinhlobo ezithile zezinhlanzi (i-catfish, i-tilapia, i-patin, i-gourami, i-koi) noma nezilinganiso ezithile zebhizinisi (amachibi asekhaya, amachibi obumba, amachibi e-tarpaulin, noma izinhlelo ze-RAS/biofloc ezijulile).
