Te Tukanga Huringa Hauota: Te Oranga Taiao i roto i te Hononga
Ko te huringa hauota tētahi o ngā huringa koiora-matū nui rawa atu o te Ao, e uru ana ki te nekehanga o te hauota i roto i ngā momo matū rerekē i waenga i te āhuarangi, te oneone, te wai, me ngā mea ora. He huānga nui te hauota, e 78% pea te nui o te āhuarangi o te Ao i roto i te āhua o te hauota (N2). Ahakoa he nui, kāore e taea e ngā mea ora te whakamahi tika i tēnei momo hauota. Nō reira, he mahi nui tā te huringa hauota ki te huri i te hauota o te āhuarangi hei āhua e taea ai e ngā tipu me ngā kararehe te whakamahi. Ka arotakehia e tēnei tuhinga ngā wāhanga matua o te huringa hauota.
### 1. Te Whakapūmautanga Hauota (Te Whakapūmautanga Hauota)
Ko te wāhanga tuatahi o te huringa hauota ko te whakapūmau hauota, te tukanga e hurihia ai te hauota hauota o te hau (N2) ki te haukini (NH3) mā te mahi a ngā moroiti, mā ngā tukanga kore-ora rānei pērā i te uira.
E rua ngā momo matua o te whakapiri hauota:
– Te Whakapūmau Koiora: Ka mahia e ētahi huakita, tae atu ki ērā o te puninga Rhizobium, e noho ana i roto i ngā pona pakiaka o ngā pīni pērā i te pīni me te alfalfa. Kei roto i ēnei huakita te whākōkī nitrogenase, ka taea te wawahi i ngā hononga kaha i waenga i ngā ngota hauota i roto i te N2 ka huri hei haukini.
– Te Whakapūmau Ā-Ao: Ka puta noa tēnei tukanga mā te uira e whakarato ana i te pūngao e ranea ana hei wawahi i te here N2 ki ngā ngota hauota takitahi, kātahi ka tauhohe ki te hāora i te āhuarangi hei hanga i te nitrite me te nitrate ka haria ki te whenua e te ua.
### 2. Te Whakakāhuinga (Te Whakakāhuinga)
Ko te whakapūngao, e mōhiotia ana ko te pirau, te whakapūngao rānei, ko te tukanga e pakaru ai ngā mea ora kua mate, ahakoa he tipu, he kararehe rānei, e ngā moroiti waikura, ka puta he haukini (NH3) he iona haukini rānei (NH4+). Kei roto i tēnei mea ora ngā pūmua, te DNA, me ētahi atu matū hauota i roto i ngā kiko ora. Ina mate ngā mea ora, ā, ka pirau, ka whakahokia te hauota i roto i ngā mea ora ki roto i te oneone hei haukini, ka taea te whakamahi anō e ngā tipu.
### 3. Te Whakapūngao Nitrification
He tukanga e rua ngā wāhanga o te whakanitirīmi e huri ana i te haukini (NH3) i ngā iona haukini rānei (NH4+) hei nitrite (NO2-) kātahi hei nitrate (NO3-). Ka mahia tēnei tukanga e ngā huakita whakanitirīmi:
– Te wāhanga tuatahi: Te waikura o te haukini hei nitrite e ngā huakita e kiia nei ko Nitrosomonas.
– NH3 + O2 → NO2- + H2O + H+
– Te wāhanga tuarua: Te waikura anō o te nitrite ki te nitrate e ngā huakita rerekē, pērā i te Nitrobacter.
– NO2- + 1/2 O2 → NO3-
Ka taea te mimiti i te pākawa waro e ngā pakiaka tipu hei matūkai nui, ka taea rānei te tango i te pākawa waro hei hauota kore utu, i runga i ngā āhuatanga o te taiao.
### 4. Te Whakaurunga
Ko te whakauru ko te tukanga e mimiti ai ngā tipu i te nitrate (NO3-) te ammonium rānei (NH4+) mai i te oneone mā roto i ō rātou pakiaka. Ka hurihia te nitrate kua mimitihia hei haukini e te whākōkī nitrate reductase i roto i ngā pūtau tipu. Kātahi ka whakamahia tēnei haukini hei hanga i ngā waikawa amino, ngā nucleotide, me ētahi atu matū hauota e tika ana mō te tipu me te whanaketanga o ngā tipu. Ka whakaratohia hoki e tēnei tukanga he puna hauota nui mō ngā kararehe e kai ana i ēnei tipu, ka whakawhānui ake i te rere o te hauota ki ngā taumata trophic i roto i te pūnaha rauropi.
### 5. Te whakakorenga o te waikawa nitritika
Ko te denitrification te tukanga e hurihia ai te nitrate (NO3-) hei hau hauota (N2) hei hau hauota waikura rānei (N2O) mā roto i tētahi raupapa o ngā tauhohenga anaerobic e mahia ana e ngā huakita denitrifying, pērā i a Pseudomonas me Clostridium.
– NO3- → NO2- → NO → N2O → N2 (g)
Ko te denitrification ka puta i raro i ngā āhuatanga anaerobic, pērā i te oneone kua mākūkū ki te wai, i ngā puranga para rauropi rānei. He mea nui tēnei tukanga nā te mea ka āwhina i te aukati i te kohikohinga nui o ngā nitrates i roto i ngā pūnaha rauropi, ka arahi pea ki te eutrophication o ngā wai.
### 6. Te Tūranga o te Tangata i roto i te Huringa Hauota
He pānga nui tō ngā mahi a te tangata ki te huringa hauota tūturu. Mā te whakamahinga o ngā maniua hauota hangai i roto i te ahuwhenua ka āwhina i te whakanui ake i te whakapūmautanga o te hauota, engari ka whai wāhi anō hoki ki te parahanga taiao mā te rerenga wai ka puta ai te eutrophication i roto i ngā wai. Mā te tahunga o ngā wahie pūmua me ngā mahi ahumahi ka puta ai hoki ngā waikura hauota, ka whai wāhi atu ki te parahanga o te hau, te ua waikawa, me te huringa āhuarangi.
### Whakamutunga
He tauira tino pai te huringa hauota mō te neke haere o ngā huānga nui i roto i ngā pūnaha rauropi taiao, e whakarite ana i te taurite e āhei ai te ora ki te tupu. Mai i te whakapūmau hauota, te whakaamōnitanga, te whakamāoritanga, te whakauru, me te whakawātea i te nitrititanga, he mahi honohono, he mahi nui hoki tā ia wāhanga. Ko te mārama me te maioha ki te uauatanga o te huringa hauota ehara i te mea nui anake ki te pūtaiao rauropi engari ki ā tātou mahi hoki ki te whakahaere i ngā rauemi taiao me te taiao kia mau tonu. Mā te mōhio nui ake ki tēnei huringa, ka taea e tātou te mahi i ngā mahi hei whakaiti i ngā pānga kino o ngā mahi a te tangata me te pupuri i te taurite taiao o ā tātou pūnaha rauropi.
