Daminozideyog ib tug dav -spectrum loj hlob retardant uas yuav siv tau raws li ib tug dwarfing neeg sawv cev, txiv hmab txiv ntoo- teeb tsa tus neeg sawv cev, hauv paus tus neeg sawv cev, thiab preservative. Nws cov teebmeem muaj xws li inhibiting cell division thiab elongation, dwarfing seedlings, txhim kho drought resistance, txhawb kev ua ntej flowering nyob rau hauv ntau cov qoob loo, nce txiv hmab txiv ntoo, thiab tiv thaiv ua ntej - sau txiv hmab txiv ntoo poob.
Mechanism ntawm Action
Tom qab nqus los ntawm cov nroj tsuag, daminozide inhibits biosynthesis ntawm endogenous gibberellins thiab auxins. Nws cov teebmeem tseem ceeb yog inhibiting kev loj hlob ntawm cov tua tshiab, shortening internode ntev, nce nplooj tuab thiab chlorophyll cov ntsiab lus, tiv thaiv paj poob thiab txhawb cov txiv hmab txiv ntoo teeb, inducing adventitious paus tsim, stimulating paus kev loj hlob, thiab kev txhim kho txias kuj.
Daminozide nkag mus rau hauv cov nroj tsuag los ntawm cov hauv paus hniav, stems, thiab nplooj, exhibiting zoo heev systemic thiab conductive zog. Nws yog thauj mus rau nws qhov chaw ntawm kev txiav txim ntawm nutrient flow. Nyob rau hauv nplooj, daminozide elongates palisade cov ntaub so ntswg, loosens spongy ntaub so ntswg, tsub kom chlorophyll cov ntsiab lus, thiab txhim kho photosynthesis. Ntawm cov nroj tsuag apex, nws inhibits mitosis hauv apical meristem. Hauv stems thiab ceg, nws shortens internode nrug thiab inhibits ceg elongation. Daminozide yog ib qho dav -spectrum thiab siv tau rau cov nroj tsuag kev loj hlob.
Kev ua tau zoo thiab kev ua haujlwm
1. Nws slows down vegetative loj hlob, ua rau cov nplooj ntsuab tsaus, me me, thiab tuab nplooj, compact thiab robust nroj tsuag, zoo -tsim paus systems, nce paus qhuav hnyav, thiab ib tug txo crown- rau - paus ratio, uas yuav pab tswj ntau tshaj vegetative kev loj hlob thiab paj bud sib txawv.
2. Nws nce chlorophyll cov ntsiab lus, ncua chloroplast senescence, slows kev loj hlob tus nqi, tsub kom net photosynthetic assimilation, txhawb kom qhuav teeb meem tsub kom, txhim kho txiv hmab txiv ntoo zoo, firmness, thiab txiv hmab txiv ntoo teem, thiab concentrates txiv hmab txiv ntoo ripening.
3. Nws tsub kom cov piam thaj intracellular cov ntsiab lus nyob rau hauv cov nroj tsuag hlwb, txo lub zog noj, thiab txo transpiration. Qhov no tej zaum yuav muaj feem xyuam rau Daminozide lub peev xwm los txhim kho cov nroj tsuag tsis zoo rau qhov chaw tsis zoo, yog li pab txo cov kab mob ntawm lub cev.
4. Nws txhawb nqa anthocyanin biosynthesis, uas pab txhim kho cov xim txiv hmab txiv ntoo thiab tiv thaiv tsis muaj xim thaum khaws cia. Daminozide yog sai decomposed los ntawm cov kab mob hauv cov av.
Txoj kev thov
Kev siv daminozide tuaj yeem ua kom luv luv internodes hauv grapevines, ua kom cov nplooj xim tob zuj zus, ua kom cov nplooj me thiab tuab, thiab nce chlorophyll. Daminozide txoj kev tswj hwm kev loj hlob ntawm txiv hmab txiv ntoo yog tsis muaj zog npaum li ntawm chlormequat chloride, thiab nws cov tua -txo cov nyhuv kuj qeeb qeeb. Kev sim qhia tau hais tias 200 mg / L daminozide kev kho mob zoo rau cov txiv hmab txiv ntoo Muscat, thaum rau Kyoho thiab Concord txiv hmab txiv ntoo, qhov concentration yuav tsum tau nce mus rau 2000-3000 mg / L. Daminozide yuav tsum tau txau 7-10 hnub ua ntej tshaj li chlormequat chloride, ntawm qhov concentration ntawm 2000-3000 mg / L, txiav txim siab raws li ntau yam txiv hmab txiv ntoo.
Kev ceev faj: Thaum siv daminozide, sim sim ntau yam hauv zos ua ntej siv dav; Tsis muaj phytotoxicity tshwm sim nrog Kyoho txiv hmab txiv ntoo kho nrog 4000 mg / L daminozide. Txau ib zaug nrog 1000 mg / L txog 2000 mg / L daminozide thaum cov nplooj tshiab muaj 6-7 nplooj tuaj yeem cuam tshuam kev loj hlob tshiab thiab nce yield. Nws tseem tuaj yeem sib xyaw nrog gibberellin kom nce qhov feem ntawm cov txiv hmab txiv ntoo tsis muaj noob, ua kom cov txiv hmab txiv ntoo ruaj khov, thiab txo kev puas tsuaj thaum lub sijhawm thauj mus los.
