Prohexadione calcium yog siv thaum lub sij hawm qab zib elongation theem, feem ntau los ntawm inhibiting ntau stem elongation, pab txhawb qhov chaw nyob, thiab txhawb cov as-ham translocation mus rau qab zib stalks, yog li ua tiav cov nyhuv ntawm qhov siab thiab nce yield.
Cov teebmeem tseem ceeb ntawm Prohexadione calcium:
1. Inhibits qia elongation thiab shortens internodes: Prohexadione calcium zoo cuam tshuam nrog gibberellin synthesis nyob rau hauv cov suab thaj, inhibiting ntau elongation ntawm internodes thaum lub sij hawm elongation theem, tswj cov nroj tsuag qhov siab, ua rau lub stems thicker thiab muaj zog, thiab txo qhov kev pheej hmoo ntawm chaw nyob.
2. Txhim kho qhov chaw tiv thaiv: Los ntawm kev ua kom ntev ntawm basal internodes thiab ua kom lub thickness thiab khoov tsis kam ntawm cov phab ntsa internode, Prohexadione calcium ho txhim kho qhov chaw nyob ntawm qab zib, tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam uas muaj cua daj cua dub thiab nag hnyav los yog nyob rau hauv siab chiv thiab dej tej yam kev mob.
3. Txhawb kev hloov pauv cov khoom noj mus rau cov ceg ntoo qab zib thiab nce yield: Thaum inhibiting vegetative txoj kev loj hlob, Prohexadione calcium txhawb cov tsub zuj zuj ntawm photosynthetic khoom nyob rau hauv lub stalks qab zib, nce sucrose cov ntsiab lus thiab qhuav teeb meem tsub kom, yog li txhim kho yield thiab zoo.
4. Txhim kho cov nroj tsuag lub cev zoo: Prohexadione calcium tuaj yeem ua kom cov ntsiab lus chlorophyll hauv nplooj thiab txhim kho photosynthetic efficiency; Nws kuj txhawb kev loj hlob hauv paus, qeeb senescence nyob rau theem tom ntej, thiab ua kom cov nroj tsuag noj qab haus huv.
Cov lus pom zoo rau kev thov:
Lub sijhawm thov: Nws raug nquahu kom siv cov tshuaj tsuag foliar thaum lub sijhawm ntxov ntawm cov kab elongation (5-10 hnub tom qab pib elongation). Qhov no yog lub qhov rais tseem ceeb rau kev tswj kev loj hlob ntau dhau; thov lig dhau lawm yuav txo tau cov nyhuv.
Pom zoo noj ntau npaum li cas: Xa mus rau cov qauv kev thov rau cov qoob loo xws li nplej. Siv 3-6 grams ntawm cov khoom xyaw nquag rau 667 m² (kwv yees li 1 mu) (qhov tshwj xeeb yuav tsum tau hloov kho raws li cov khoom lag luam thiab kev loj hlob ntawm cov nroj tsuag), diluted nrog dej thiab txau sib npaug ntawm cov stems thiab nplooj.
Kev ceev faj: Prohexadione calcium degrades sai sai thiab muaj cov seem qis, ua rau nws muaj kev nyab xeeb rau cov qoob loo tom ntej, tab sis nws yuav tsum tsis txhob sib tov nrog cov tshuaj tua kab muaj zog acidic. Yog tias nag hnyav tshwm sim tom qab thov, cov tshuaj txau ntxiv yuav tsim nyog.
