Te Mārama ki ngā Āhuatanga Matatini o te Oneone
Ko te oneone te tūāpapa matua mō te ora i runga i te whenua. Ehara i te mea he "pūnaha whakatipu" noa iho, engari he pūnaha taiao uaua, hihiri, ā, e huri haere tonu ana. He maha ngā tukanga ā-tinana, ā-matū, me ā-koiora e puta ana i roto i te oneone, e whakatau ana i tōna momona, i tōna wāteatanga o te wai, i tōna pupuri matūkai, me tōna pai mō te ahuwhenua, te ngahere, me te whanaketanga. Hei mārama ki te mahi a te oneone, ko te huarahi matua ko te ako i ōna āhuatanga ā-tinana me ā-matū—arā, ko ngā āhuatanga e takoto ana i te hononga o ngā āhuatanga ā-tinana me te matū, ā, e awe ana tetahi ki tetahi.
He aha ngā āhuatanga ā-tinana, ā-matū hoki o te oneone?
Ko ngā āhuatanga ā-tinana, ā-matū hoki o te oneone e pā ana ki ngā āhuatanga o te oneone e puta mai ana i te taunekeneke o ngā wāhanga ā-tinana (pēnei i te kakano, te hanganga, te pūngao) me ngā wāhanga matū (pēnei i te utu hiko matūriki, te ihirangi katote, te pH, me ngā tauhohenga matū). Ka tino whakatau ēnei āhuatanga i te whanonga o te oneone i roto i te penapena wai, te pupuri me te tuku matūkai, me te urupare ki ngā mahi whakahaere pēnei i te whakamomona, te whakakōkī, me te whakamakuku.
E whā ngā wāhanga matua o te oneone: ko ngā kohuke, ngā mea rauropi, te wai, me te hau. Mā te ōwehenga o ēnei wāhanga e whā, me te rahi me te momo o ngā matūriki kohuke (onepu, paru, uku), ka whakatau i ētahi āhuatanga ā-tinana, ā-matū hoki.
1. Te kakano o te oneone me tōna pānga ki ngā tauhohenga matū
Ko te kakano oneone ko ngā ōwehenga ōrite o te onepu, te paru, me te uku. Ko tēnei kakano te mea nui e whakatau ana i te horahanga o te mata o ngā matūriki. He tino iti ngā matūriki uku, ā, he nui te horahanga o te mata, e āhei ai rātou ki te mimiti i te wai me ngā matūkai he nui ake i te onepu.
Mai i te tirohanga ā-tinana, ko te oneone kakano uku ka pā ki ēnei āhuatanga:
– Ka roa ake te pupuri i te wai,
– He iti ake te hau e puta mai ana mēnā he ngoikore te hanganga,
– He māmā ake te whakakīkī mēnā kāore i te tika te whakahaere.
Mai i te tirohanga matū, ko ngā oneone uku he:
– He nui ake te kaha whakawhiti kationi (ina koa mēnā he tauhohe ngā kohuke uku),
– He kaha ake ki te pupuri i ngā matūkai pēnei i te K⁺, Ca²⁺, Mg²⁺, me te NH₄⁺,
– He ātete ake ki te mimiti o ngā matūkai i te oneone onepu.
I tētahi atu taha, he nui ngā pūwero o te oneone onepu e tere ake ai te rerenga wai, engari he iti te kaha ki te pupuri i ngā matūkai, nō reira me auau ake, me tika ake hoki te whakamomona.
2. Te hanganga o te oneone, te whakakotahitanga, me tōna hononga ki te momonatanga
Ko te hanganga o te oneone ko te whakaritenga o ngā matūriki hei puranga (ngā puranga). Mā te hanganga pai (ngā pakarukaru/ngā kirikiri) ka taurite ngā pūnga nui me ngā pūnga moroiti: ka mau tonu te wai engari kei te wātea tonu te hau. He nui te pānga o ngā mea rauropi, te mahi pakiaka, ngā moroiti, me te momo uku ki te hanganga.
I runga i te āhua ā-tinana, e pā ana te hanganga ki:
– Te rere me te marara o ngā matūriki uku. Ka āwhina ngā katote Ca²⁺ me te Mg²⁺ i te rere (pūpū), engari ko te kaha o te Na⁺ ka puta te marara (te pakaru o ngā mea whakahiato).
– Te pumau o te kirikiri, e whakatau ana i te horo. Kāore e tino memeha ngā kirikiri pumau ina pāngia e te ua, ā, ka whakaitihia te rere o te wai me te ngaronga o ngā matūkai.
– Te wātea o ngā matūkai, nā te mea ka māmā ake te tupu o ngā pakiaka i roto i te oneone whai hanganga pai, ā, ka maeneene ake te nekehanga o te wairewa oneone.
He maha ngā wā ka ngoikore te hanganga o ngā oneone konutai (he nui te Na⁺)—ka mārō te mata ina maroke, ka piri ina mākū—ka iti haere te hua.
3. Te utunga mata matūriki me te kaha whakawhiti kationi (CEC)
He maha ngā matūriki oneone, inā koa te uku me ngā mea rauropi, he utu hiko kei runga i ō rātou mata. Mā tēnei utu ka taea e te oneone te pupuri i ngā katote utu pai (ngā katote) me ētahi katote utu kino (ngā anion) mā te tikanga whakawhiti.
Ko te Āheinga Whakawhitinga Kationi (CEC) he mehua o te kaha o te oneone ki te pupuri me te whakawhiti i ngā kationi pēnei i te Ca²⁺, Mg²⁺, K⁺, Na⁺, me te NH₄⁺. Ko te CEC teitei he tohu i te nui ake, i te pumau ake hoki o te puna matūkai o te oneone.
Ngā āhuatanga e pā ana ki te KTK:
– Te nui o te uku me te momo kohuke uku (hei tauira, he nui ake te smectite i te kaolinite),
– Ngā mea rauropi (he nui te ihirangi humus),
– Te pH o te oneone (i roto i te nuinga o ngā oneone, ka piki te utu kino i te pikinga o te pH).
Ko te nuinga o ngā oneone pārūrū he kaolinite me ngā waikura rino/konumohe, ā, he iti noa iho ngā CEC e puta mai ana. I raro i ēnei āhuatanga, he mea nui te mahi a ngā mea rauropi.
4. Te pH o te oneone me tōna pānga ki te wātea o ngā matūkai
Ko te pH o te oneone e tohu ana i te taumata o te waikawa, te kawakore rānei o te oneone. Ko te uara pH te mea nui hei whakatau i te wairewatanga o ngā kohuke me te āhua matū o ngā huānga, ā, ka pā ki te wātea o ngā matūkai me te paitini pea.
I te nuinga o te wā:
– mēnā he iti rawa te pH (waikawa) ka nui ake te wairewatanga o te Al³⁺ me te Fe²⁺/Fe³⁺, ka paitini pea ngā pakiaka me te here i te whākōkī.
– Ki te nui rawa te pH (kawakore) ka whakaiti i te wātea o ngā matūkai iti pēnei i te Fe, Mn, Zn, me te Cu.
– Ko te awhe pH o te 5,5–7 te mea tino pai mō te nuinga o ngā hua kai, ahakoa he rerekē ngā manakohanga o ia hua.
Ko te whakahaere pH ka mahia mā te whakakōhatu (te whakanui ake i te pH o te oneone waikawa) te whakahaere tote/kawakore rānei i ētahi oneone.
5. Ngā tauhohenga redox, te hau, me ngā whanaketanga huānga
Kāore te oneone i te āhua "hauora" i ngā wā katoa. I ngā oneone kua waipuketia (pērā i ngā pāmu raihi), ka tere te pau o te hāora, ā, ka heke te kaha o te hauora. Ka huri tēnei i te āhua matū o ngā huānga maha:
– Ka taea te whakaiti i te rino me te konupūmā kia māmā ake ai te wairewa,
– Ka taea te ngaro te nitrate (NO₃⁻) mā te denitrification hei hanga i te hau N₂, N₂O rānei,
– Ka nui ake te wātea o te whākawa i raro i ētahi āhuatanga nā ngā panonitanga o te hononga ki te Fe/Al.
Ko ngā āhuatanga ā-tinana pēnei i te porosity, te rerenga wai, me te hohonu o te papa wai e whakatau ana mēnā he ōhaukū, he whakaheke rānei te oneone. Nō reira, he taputapu nui te whakahaere wai (rere wai/whakamakuku) hei whakahaere i te matū o te oneone.
6. Te tote me te waikura: te tote, te konutai, me ngā take hanganga
Ko te tote te kukū nui o ngā tote rewa i roto i te wai oneone, ko te tote ia e pā ana ki te nui o te konutai i roto i te matatini mimiti o te oneone. E kitea whānuitia ana ēnei e rua i ngā wāhi maroke, i ngā whenua kāore i te pai te rerenga wai, i ētahi wāhi takutai rānei.
Ngā pānga ā-tinana, ā-matū hoki o te tote:
– Ka whakanui ake i te pēhanga osmotic kia uaua ai ngā tipu ki te mimiti i te wai ahakoa te āhua mākū o te oneone,
– Ka pāngia pea te kore taurite o ngā matūkai (hei tauira, te whakataetae i waenga i te Na⁺ me te K⁺).
Te pānga o te noho pōrearea:
– Ka horapa te uku, ka kino ngā mea whakapūkara,
– Ka whakaiti i te urunga mai o te wai, ā, ka kino ake te waipuke,
– Ka hua ake he mata oneone mārō, he uaua ki te ngaki.
Ko te tikanga maimoatanga ko te whakapai ake i te rerenga wai, te tango tote, te whakamahi i ngā rongoā whakapai ake pērā i te gypsum (CaSO₄), me te whakahaere tika i te whakamakuku.
7. Te tūranga o te mea rauropi i roto i ngā āhuatanga ā-tinana me ā-matū
Ko te mea rauropi te "here" matua e whakapai ake ana i ngā āhuatanga maha o te oneone i te wā kotahi:
– Te whakanui ake i te whakakotahitanga me te pumau o te hanganga,
– Te tāpiri i te KTK,
– Hei puna matūkai (N, P, S) mā te whakapūtanga o ngā kohuke,
– Ka whakanui ake i te kaha pupuri wai, inā koa i ngā oneone onepu.
Hei tāpiritanga, ka hangaia e ngā mea rauropi he matatini ki te Al me te Fe, ka taea te whakaiti i te here o te phosphorus me te whakaiti i te paitini i roto i ngā oneone waikawa. Nā te whānui o ō rātou painga, he mea nui ngā rautaki pēnei i te tāpiri i te wairākau, te whakawairakau, te paparanga, me te whakatipu taupoki hei whakapai ake i te kounga o te oneone mō te wā roa.
Whakamutunga
Mā te mārama ki ngā āhuatanga ā-tinana me ā-matū o te oneone ka taea e tātou te kite i a ia hei pūnaha honohono: ka pā te kakano ki tōna kaha ki te pupuri i te wai me ngā matūkai; ka whakatauhia te hanganga e ngā taunekeneke o ngā katote, te uku, me ngā mea rauropi; ka whakahaere te pH i te wairewa o ngā huānga; ka whakatau ngā āhuatanga hau i ngā tauhohenga redox; ā, ka taea e te tote, te wai rānei te whakararu nui i te mahi a te oneone. Mā te mārama ki ēnei whanaungatanga, ehara te whakahaere oneone i te mea whakamātautau noa iho, engari he mea pūtaiao—ka hua ake he hua ahuwhenua pumau ake, he tiaki taiao pai ake, me te oneone hauora ake mō ngā whakatipuranga o muri mai.
