Āmoniuma, pāhare pākawa rānei: ka puta te hauota i roto i te kai rīwai
Kāore he whakautu mō te pātai "ko tēhea hauota te pai ake?" mēnā kāore he āhuatanga oneone — ā, ka taea e te nui rawa o te N e wātea ana te whakaroa i te whakatō o ngā kōpura me te tapahi i ngā mea maroke.
Raupapa Kai Rīwai · Wāhanga 04 o te 24 · Ngā wāhanga katoa kia rite te raupapa
Kāore he whakautu mō te pātai "ko tēhea hauota te mea pai ake?" mēnā kāore koe e mōhio ki te oneone. He tere te wātea o te hauota (NO₃⁻) engari he ngāwari te tango, inā koa i runga i ngā oneone onepu i raro i te whakamakuku tauhiuhi. He pai ake te pupuri i te haukini (NH₄⁺) e te matatini whakawhiti engari ka āta whakahāngaihia ki te haukini i roto i ngā oneone mahana, hauhautanga. Ka waiariki tuatahi te Urea ki te haukini; ina pania ki te mata me te kore e whakauruhia, ka taea te ngaronga o te haukini.
E taunaki ana ngā aratohu CDFA a California kia inehia te toenga o te hauota o te oneone kia tata ki te wā whakato, me te aroturuki i ngā matūkai puta noa i te wā, kaua e whakawhirinaki noa ki te āhua kua tohua ki te tapanga tongi. I roto i te oneone kua rumakina ki te wai, i te oneone makariri rānei, ka rerekē te ōwehenga o ngā āhua kohuke me te tere o tō rātou hurihanga. He mea nui te pH, te pāmahana, te makuku, te tikanga tono me te wā tae noa ki te whakamakuku e whai ake nei.
Ngā rā o te wiki. Whakakore i te ohaurunga mā te pāwhiri kotahi.
Ngā hanganga hauota i te tirohanga kotahi
| puka | Te whanonga i roto i te oneone | mōrea matua |
|---|---|---|
| Nitrate NO₃⁻ | Kei te wātea tonu, waea pūkoro | Te whakamakuku i runga i te onepu i raro i te whakainu |
| Āmoniuma NH₄⁺ | Kei te pupurihia e te whare whakawhitiwhiti kōrero | Te whakapūngao hauota i roto i te oneone mahana |
| Urea | Ka waikura ki te haukini | Te ngaronga o te haukini mēnā kāore i whakauruhia |
Whakatairite ariā, kāore he utu.
Mā te nui rawa o te hauota e wātea ana ka whakaroa i te tīmatanga me te pakari o ngā kōpura, ka whakaiti i te maroke o te hua, ka uaua hoki te kotinga. Nō reira, kaua te nui o te N i te tīmatanga e huri hei whakatōnga tōmuri aunoa. Me whakarite ngā kaupapa i te nui o ngā matūkai kua tāpirihia, me te kounga o te hua anake, kaua i te papa matomato o te tuanui.
Te whenua me te tono mahi
Minnesota me Idaho: he nui te mōrearea o te tātā o te hauota i runga i ngā oneone onepu kua whakamakukuhia. Airana: mātakitaki i te ua me te whakapūtanga o ngā mea rauropi. I runga i ngā oneone matao o te raki-uru o Rūhia, me aromatawai motuhake te tere o te hurihanga o ngā hanganga N.
Ngā tuhipoka ā-rohe
- Ruhia me Ahia Waenganui (Kazakhstan, Uzbekistan): on irrigated land in Uzbekistan and Kazakhstan, nitrate moves with water; time N to irrigation rather than to the calendar.
- Amerika Latina (Brazil, ngā whenua o Andean): in warm, well-aerated tropical soils ammonium nitrifies quickly and nitrate leaches; cooler highland soils (Andes) keep more ammonium. Split applications are common practice.
- Āwherika (Kenya, Nigeria, Zimbabwe, Zambia): rain-fed highland crops lose N in heavy rains; match top-dressing to rainfall and canopy condition.
- Āhia ki te Tonga-Rawhiti (Wītnam, Thailand, Philippines): short cool-season crops need N early; late N risks delaying maturity before the warm season returns.
He tikanga whānui tēnei mō ngā aratohu ahuwhenua; me whakaae tahi me tō tohunga ahuwhenua ki ngā utu me ngā wā e tika ana.
Rauemi hoa: Uralchem hua — kōwhiringa ā-tikanga
WHĀNUI 18:18:18+3MgO+TEMō ngā whakatikatika i te wā e tipu kaha ana, kei roto i te rārangi te UNIVERSAL 18:18:18+3MgO+TE wairewa-wai. Me whakamahi anake mēnā kua whakaūtia he korenga o ngā matūkai e rite ana, ā, kei roto i te tahua hauota whānui.
Whakaahua hua: Uralchem.
hea Uralchem Ngā taonga: Rūhia me te CIS, Amerika Latina, Āwherika (mā tana kaituku United Fertilizer Company Limited) me Āhia ki te Tonga-Rawhiti, kei reira te kamupene e whakawhanake ana i te tohatoha ki Vietnam, Thailand me Philippines. He rerekē te wātea o ngā momo motuhake i ia whenua — tirohia ki te kaituku ā-rohe.
Ehara i te tūtohutanga utu — whakapā atu ki tō tohunga ahuwhenua.
Rauemi
- Te Tari Kai me te Ahuwhenua o California, Ngā Aratohu Whakamomona: Rīwai.
- Te Whare Wānanga o Minnesota Toronga, Rangahau whakahaere matūkai rīwai: e rima ngā akoranga.
- Stapley et al., Te whakarārangi me te whakawhiti i ngā hauota 4R ki runga i te rīwai, Soil Science Society of America Journal.
Ngā raraunga hoa (Uralchem)
Raupapa Kai Rīwai · Wāhanga 04 o te 24
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