Njira Zopangira Njira Yopangira Mpweya pa Dziwe la Nsomba
Kutulutsa mpweya ndi chimodzi mwa zinthu zofunika kwambiri pa ulimi wa nsomba, kaya m'madziwe a dothi, m'madziwe a tarpaulin, m'madziwe a konkire, kapena m'njira zambiri monga biofloc ndi RAS (Recirculating Aquaculture System). Ntchito yayikulu ya mpweya ndikuwonjezera kuchuluka kwa mpweya wosungunuka (DO) m'madzi, kuthandiza kutulutsa mpweya woipa monga carbon dioxide (CO₂) ndi ammonia (NH₃), ndikusunga kuyenda kwa madzi kuti madzi azikhala abwino. Popanda kapangidwe koyenera ka mpweya, nsomba zimakhala ndi nkhawa mosavuta, chilakolako chawo chimachepa, kukula kwawo kumachepa, ndipo chiopsezo cha kufa kwa anthu ambiri chimawonjezeka, makamaka usiku kapena nthawi yamvula yayitali. Chifukwa chake, kupanga njira yotulutsira mpweya sikungokhala nkhani ya "kuwonjezera chotulutsira mpweya"; kumafuna njira yaukadaulo yogwirizana ndi zosowa za dziwe.
1. Kumvetsetsa zosowa za mpweya m'madzi ndi m'nyanja
Gawo loyamba ndikumvetsetsa zomwe zimafunika pa mpweya wa mtundu wa nsomba zomwe zikuwetedwa komanso kuchuluka kwa nsomba zomwe zikuwetedwa. Kawirikawiri, nsomba za m'madzi oyera monga nsomba zam'madzi, tilapia, pangasius, kapena gourami zimafuna DO yocheperako ya pafupifupi 3-5 mg/L kuti zikule bwino, pomwe machitidwe olimba nthawi zambiri amafunafuna 5-7 mg/L kuti chakudya chizigwira bwino ntchito. Kufunika kwa mpweya kumawonjezeka ndi kuchuluka kwa biomass (kulemera konse kwa nsomba), kutentha kwambiri kwa madzi, ntchito ya nsomba, komanso kuchuluka kwa zinthu zachilengedwe kuchokera ku chakudya chotsala ndi zinyalala.
Kuphatikiza apo, makhalidwe a dziwe amatsimikizanso njira yopezera mpweya: malo ozungulira, kuya, mawonekedwe a dziwe, gwero la madzi, komanso kupezeka kwa zomera zam'madzi kapena matope. Dziwe lozama koma lopapatiza limakhala ndi zofunikira zosiyanasiyana zoyendera madzi kuposa dziwe lalikulu koma losaya. Maiwe okhala ndi matope ambiri achilengedwe nthawi zambiri amafunikira mpweya wochuluka chifukwa njira yowola imagwiritsa ntchito mpweya.
2. Dziwani zolinga za kapangidwe kake: DO, kufalikira kwa mpweya, ndi chitetezo cha ntchito.
Kapangidwe ka mpweya wolowera mpweya kuyenera kukhala ndi zolinga zitatu zazikulu:
1. Sungani DO yokhazikika pamlingo wotetezeka tsiku lonse, makamaka mbandakucha usanache pamene DO nthawi zambiri imakhala yotsika kwambiri.
2. Pangani kuyenda kwa madzi kuti pasakhale "malo akufa" omwe alibe mpweya.
3. Ili ndi malo osungira ndi chitetezo: yosavuta kuyang'anira, ili ndi dongosolo pamene magetsi azima, ndipo siikakamiza nsomba chifukwa mphamvu yamagetsi ndi yamphamvu kwambiri.
Mwabwino, kapangidwe ka mpweya wolowa m'madzi kamaganizira zochitika zoyipa kwambiri: kuchulukana kwa nsomba, nyengo ya mitambo, kudya chakudya chambiri, ndi kutentha kotentha. Ngati mpweya wolowa m'madzi uli wokwanira pokhapokha ngati zinthu zili bwino, dziwe lidzakhala losatetezeka pamene katundu akuwonjezeka.
3. Kusankha mtundu wa chopumira mpweya ndi mfundo yogwirira ntchito yake
Pali njira zingapo zodziwira mpweya zomwe zimagwiritsidwa ntchito polima nsomba:
a. Choyatsira mpweya chozungulira
Mawilo amadzi amagwiritsidwa ntchito kwambiri m'mayiwe kapena m'mayiwe akuluakulu. Ubwino wawo ndi monga kuwonjezera DO pamene akusuntha madzi pamwamba, kulimbikitsa kuyenda kwa madzi, komanso kuthandiza kukankhira zinyalala pamalo enaake akayendetsedwa bwino. Zoyipa zake ndi monga chizolowezi chowononga magetsi m'mayiwe ang'onoang'ono komanso kuthekera kwa mafunde amphamvu ngati sayendetsedwa bwino.
b. Choyatsira mpweya/choyatsira mpweya (mwala woyatsira mpweya, diski yoyatsira mpweya)
Dongosololi limagwiritsa ntchito chofewetsera mpweya kapena chokometsera mpweya kudzera mu payipi kupita ku chofewetsera mpweya chomwe chili pansi pa dziwe. Ma thovu osalala omwe amatuluka amawonjezera kusamutsa mpweya ndikuthandizira kugwedezeka kwa mpweya. Ndi oyenera dziwe la tarpaulin, konkire, biofloc, ndi RAS. Chofunika kwambiri ndi mtundu wa chofewetsera mpweya, kukula kwa thovu, ndi malo olowera mpweya.
c. Choyatsira mpweya cha Venturi kapena choyatsira mpweya cha jet
Makina a Venturi amagwiritsa ntchito madzi otuluka mu pampu kuti "ayamwe" mpweya ndikusakaniza. Makinawa amapanga mpweya ndi madzi okwanira, oyenera kuyenda m'madziwe a simenti ndi mapaipi.
d. Chopopera mpweya pamwamba (kasupe kapena chotulutsira mpweya)
Mtundu uwu umaswa madzi pamwamba, zomwe zimathandiza kuti mpweya ulowe mwachangu. Ndi wothandiza m'madziwe omwe amafunikira mpweya mwachangu, koma nthawi zambiri suli bwino kwambiri posakaniza madzi apansi ngati dziwe lili lozama.
Kusankha zida sikungokhudza mtengo wokha; kuyeneranso kukhala koyenera kukula kwa dziwe, zofunikira za DO, komanso kupezeka kwa magetsi. Pa maiwe ang'onoang'ono, amphamvu, chofewetsera ndi choyatsira mpweya nthawi zambiri zimakhala zogwira mtima kwambiri. Pa maiwe akuluakulu, kuphatikiza gudumu lamadzi ndi mpweya wolowa pansi kungapereke zotsatira zofanana.
4. Kuwerengera zofunikira pa mpweya wokwanira
M'munda, alimi nthawi zambiri amagwiritsa ntchito njira yothandiza potengera kuchuluka kwa masheya ndi luso lawo. Komabe, kuti mupange kapangidwe koyezeka, gwiritsani ntchito mfundo izi:
– Biomass ikachuluka, mpweya wofunikira umakhala wochuluka.
– Kuchuluka kwa chakudya cha nsomba, mpweya wochuluka womwe umagwiritsidwa ntchito chifukwa cha kagayidwe ka nsomba komanso ntchito ya mabakiteriya ovunda.
Monga njira yosavuta, konzani deta:
1. Kuchuluka kwa madzi a dziwe (m³).
2. Zomera zamoyo zomwe zili mu target (kg yonse ya nsomba).
3. Mlingo wa chakudya cha tsiku ndi tsiku (kg/tsiku).
4. Cholinga chochepa cha DO (monga 5 mg/L).
Kenako, dziwani mphamvu ya chipangizo chopumulira mpweya kutengera malangizo a wopanga (monga, kayendedwe ka mpweya wopumulira mpweya, mphamvu yamagetsi, kapena malo ophimbira mpweya). Popeza zofunikira zimasiyana pakati pa mitundu, gawo lofunika kwambiri ndikuyesa chipangizo chopumulira mpweya ndi mita ya DO. Kupumira mpweya bwino sikungokhala "ma thovu ambiri," koma m'malo mwake ndi kuwonjezeka kwenikweni kwa DO.
5. Njira zogwiritsira ntchito bwino makina opumira mpweya
Kuyika kwa mpweya nthawi zambiri kumatsimikizira zotsatira kuposa kuwonjezera mphamvu. Mfundo zina za kapangidwe kake:
a. Pewani malo opanda kanthu
Maiwe okhala ndi mawonekedwe a rectangular kapena corner nthawi zambiri amakhala ndi malo omwe mpweya umazungulira pang'ono. Ikani chopumira mpweya kuti chipange mawonekedwe ozungulira, zomwe zimapangitsa kuti madzi aziyenda m'dziwe lonse.
b. Ikani patsogolo malo okhala ndi nsomba zambiri
Nsomba nthawi zambiri zimasonkhana m'malo ena (monga pafupi ndi malo olowera madzi, malo odyetsera, kapena malo otentha). Onetsetsani kuti malowa ali ndi mpweya wabwino, koma pewani mafunde amphamvu omwe angachotse mphamvu ya nsomba.
c. Mpweya woyambira kuti ugonjetse kugawikana
M'madziwe akuya, madzi amatha "kuphwanyidwa": pamwamba pake pamakhala mpweya wochuluka, ndipo pansi pake pamakhala mpweya wochepa. Kuyika chotenthetsera madzi pansi kumathandiza kusakaniza molunjika ndikuletsa kusonkhanitsa mpweya woipa.
d. Kuphatikiza zida
Pa maiwe amphamvu, kuphatikiza mpweya wolowa m'madzi pamwamba (kuti ayankhe mwachangu) ndi mpweya wolowa pansi (kuti ukhale wolimba) nthawi zambiri kumabweretsa zotsatira zabwino kwambiri. Mwachitsanzo, chofewetsera mpweya ndi choyatsira mpweya ndiye njira yoyamba yopezera mpweya, yokhala ndi chofewetsera mpweya pamwamba ngati chothandizira usiku kapena mvula yamphamvu.
6. Khazikitsani maola ogwirira ntchito: masana, usiku, ndi zochitika zadzidzidzi
Kulephera kwa ulimi nthawi zambiri kumachitika chifukwa cha kuchepa kwa DO m'mawa kwambiri. Usiku, zomera za phytoplankton ndi zamoyo zam'madzi sizipanga photosynthesis, kotero mpweya supangidwa ndipo umadyedwa m'malo mwake. Chifukwa chake, makina opumira mpweya ayenera:
– Kuwala kumawala nthawi yayitali usiku mpaka m'mawa, makamaka 22:00–06:00.
- Wonjezerani mphamvu pamene nyengo ili ndi mitambo kapena madzi akuyamba kukhala okhuthala komanso amdima.
- Imakhala ndi nthawi yadzidzidzi pamene nsomba imayamba "kupuma" pamwamba.
Ngati magetsi akuzimitsidwa pafupipafupi, khalani ndi dongosolo lothandizira: jenereta, UPS ya ma blowers ang'onoang'ono, kapena chopumira chogwiritsa ntchito batri pazochitika zovuta. Kapangidwe kabwino ka makina opumira mpweya nthawi zonse kamakhala ndi dongosolo lochepetsera kuzizira.
7. Kuphatikiza mpweya wokwanira ndi kasamalidwe kabwino ka madzi
Kutsegula mpweya si njira yoloŵa m'malo mwa kasamalidwe ka madzi. Kuti muwonetsetse kuti makina opumulira mpweya akugwira ntchito bwino, chitani izi:
- Kuletsa kudya: pewani kudya mopitirira muyeso chifukwa chakudya chotsalacho chidzadya mpweya wambiri.
- Chotsani matope nthawi ndi nthawi ngati dongosolo likulola.
– Sungani pH, ammonia, ndi nitrite mkati mwa malire otetezeka. Kupuma kumathandiza, koma kuchuluka kwa ammonia kungapangitse nsomba kukhala ndi nkhawa.
- Gwiritsani ntchito ma probiotics kapena ma biofilters (m'machitidwe ena) kuti mukhazikitse njira ya nitrification, yomwe imafunikanso mpweya.
Mwa kuyankhula kwina, mpweya ndi gawo la chilengedwe cha dziwe: madzi akamayera bwino komanso mokhazikika, katundu wopopera mpweya umachepa.
8. Kuyang'anira ndi kuwunika: chinsinsi cha kapangidwe kopambana
Kapangidwe ka mpweya sikuyenera kuyima zipangizo zikangoyikidwa. Chitani kafukufuku nthawi ndi nthawi pogwiritsa ntchito zida zoyezera:
– DO mita yowunikira DO pamalo angapo (pamwamba ndi pansi).
– Thermometer yowunikira kutentha, chifukwa kutentha kwambiri kumachepetsa kusungunuka kwa mpweya.
– Kuona momwe nsomba zimachitira: nsomba zomwe zimasonkhana pamwamba, zomwe zimakhala zofooka, kapena zomwe sizikufuna kudya kungakhale zizindikiro za DO yovuta.
Yesani makinawa pakakhala nyengo yovuta, monga pamene chakudya chachuluka kapena mvula yamphamvu. Ngati kuchuluka kwa madzi m'thupi kwatsika, ganizirani kuwonjezera malo otulutsira madzi, kusintha makina opumira mpweya, kapena kuwonjezera mphamvu ya makina opumira/mawilo.
Kutseka
Kupanga njira yopezera mpweya m'dziwe la nsomba kumafuna kumvetsetsa zosowa za mpweya m'nyanja, makhalidwe a dziwe, komanso kusankha zida zoyenera komanso kapangidwe kake. Kupeza mpweya wabwino sikuyenera kukhala kokwera mtengo kwambiri kapena kolimba kwambiri nthawi zonse, koma kuyenera kukhala kokhoza kusunga milingo yokhazikika ya DO, kupanga kuyenda kofanana kwa madzi, komanso kukhala kotetezeka pakagwa ngozi. Ndi kapangidwe koyezedwa bwino, kuyang'anira nthawi zonse, komanso kuphatikiza ndi kasamalidwe ka chakudya ndi madzi abwino, kupatsa mpweya mpweya kudzakhala "mtima" wa dziwe, kulimbikitsa kukula kwa nsomba mwachangu komanso kwathanzi komanso kukolola nthawi zonse.
Ngati mukufuna, ndingakuthandizeni kupanga chitsanzo cha kapangidwe ka mpweya kutengera deta ya dziwe lanu (kukula kwa dziwe, kuya kwake, mtundu wa nsomba, kuchuluka kwa nsomba zomwe zili m'madzi, ndi cholinga chokolola).
