Izici Ezithinta Ukuhluma Kwembewu
Ukuhluma kwembewu kuyisigaba esibalulekile emjikelezweni wokuphila kwezitshalo, okumelela ibhuloho phakathi kwezigaba zokuzala kanye nezokutshala. Kuhilela ukusebenza kwemishini ye-metabolic yembewu, okuholela ekuveleni kwe-radicle (impande ye-embryonic) kanye ne-plumule (ihlumela). Le nqubo ebucayi ithonywa yizinto ezahlukahlukene zangaphandle nezangaphakathi. Ukuqonda lezi zinto kubalulekile ekuthuthukiseni umkhiqizo wezolimo, ukubuyisela imvelo, kanye nokulondoloza ukuhlukahluka kwezitshalo. Lesi sihloko sihlola izici ezibalulekile ezithinta ukuhluma kwembewu.
1. Ukutholakala Kwamanzi
Amanzi abalulekile ekusebenzeni kwama-enzyme aqhuba inqubo yokuhluma. Imbewu imunca umswakama ngenqubo ebizwa ngokuthi i-imbibition, ebangela ukubuyiselwa kwamanzi emzimbeni kanye nokuvuvukala kwezicubu zembewu. Lokhu kudonswa kwamanzi kuncibilikisa ukudla okugciniwe okugciniwe, okwenza kube lula ukukuthola ezithonjeni ezikhulayo.
Kodwa-ke, kokubili ukushoda kwamanzi kanye nokutholakala kwamanzi amaningi kungavimbela ukuhluma. Nakuba umswakama onganele uvimbela ukusebenza kwe-metabolic, ukugcwala kwamanzi kungabangela ukuntuleka komoya-mpilo, okuholela ezimweni ezingena-aerobic ezingalimaza ukukhula kwembewu. Ngakho-ke, ukugcina umswakama wenhlabathi ofanele kubalulekile ukuze kuhlume ngempumelelo.
2. Ukushisa
Izinga lokushisa lithinta kakhulu izinga kanye nempumelelo yokuhluma kwembewu. Uhlobo ngalunye lwesitshalo lunezinga lokushisa elifanele lokuhluma, ngokuvamile libonisa izindawo zalo zemvelo zokuhlala. Isibonelo, izinhlobo ezinesimo sezulu esifudumele zivame ukuhluma kahle emazingeni okushisa aphansi (15-25°C), kuyilapho izinhlobo zasezindaweni ezishisayo zidinga izimo ezifudumele (25-35°C).
Izinga lokushisa lithinta ijubane lokusabela kwama-enzyme ngaphakathi kwembewu, kanye nokubanda okukhulu okunciphisa izinqubo ze-metabolic, kanye nokushisa ngokweqile okungase kuphazamise amaprotheni abalulekile. Kuphinde kuthinte ubuqotho bezakhiwo zamaseli kanye nokuvuleka kwe-membrane, okubalulekile ekumuncweni kwezakhamzimba ngesikhathi sokuhluma.
3. Ukutholakala Komoya-mpilo
Umoya-mpilo ubalulekile ekuphefumuleni kwamaseli, inqubo lapho imbewu ikhiqiza khona amandla adingekayo ekukhuleni. Ngesikhathi sokuhluma, umsebenzi wokugaya ukudla kwembewu uyanda kakhulu, okudinga ukutholakala komoya-mpilo ophezulu. Imbewu egqitshwe kakhulu enhlabathini noma esesimweni sokugcwala kwamanzi ingase ibhekane nokuntuleka komoya-mpilo, okuvimbela ukuphefumula, futhi ngenxa yalokho, ukuhluma.
Ukungenisa umoya emhlabathini kuqinisekisa ukuthi imbewu ithola umoya-mpilo owanele. Ngempela, inhlabathi ekhipha kahle umoya enesakhiwo esihle ayikhuthazi nje kuphela ukutholakala komoya-mpilo kodwa futhi nokungena kahle nokugcinwa kwamanzi, okudala indawo efanele yokuhluma.
4. Ukukhanya
Ithonya lokukhanya ekuhlumeni kwembewu liyahlukahluka phakathi kwezinhlobo. Ngenkathi ukukhanya kukhuthaza ukuhluma kwezinye imbewu (imbewu ezinhle ezi-photoblastic), ezinye zidinga ubumnyama ukuze zihlume (imbewu ezimbi ezi-photoblastic). Imbewu ezwela ukukhanya ine-photoreceptors ethola izimpawu zokukhanya, ezingabangela noma zivimbele inqubo yokuhluma.
Lokhu kuhlukahluka kubonisa ukuzivumelanisa kwemvelo ezindaweni ezithile zemvelo. Isibonelo, imbewu encane ivame ukudinga ukukhanya ukuze ibonise ukuthi kukhona indawo yomhlabathi futhi ivimbele ukuhluma lapho igqitshwe kakhulu, okuqinisekisa ukuthi isithombo esikhulayo sifinyelela ekukhanyeni ngokushesha. Ngokuphambene nalokho, imbewu enkulu egcwele amandla amaningi agciniwe ingahluma ngempumelelo isuka ekujuleni okukhulu.
5. I-pH yomhlabathi
I-pH yomhlabathi ithinta ukutholakala kwezakhamzimba ezibalulekile kanye nomsebenzi wama-enzyme ahilelekile ekuhlumeni kwembewu. Imbewu eminingi ihluma kahle enhlabathini engathathi hlangothi kuya kwene-asidi encane (pH 6.0-7.0). Kodwa-ke, ezinye izinhlobo zijwayela izimo ze-asidi noma ze-alkaline kakhulu, okubonisa ukuhlukahluka kwezindawo zenhlabathi lapho izitshalo zithuthuka khona.
Ukweqisa kwe-pH kungabangela ukuntuleka kwezakhamzimba noma ubuthi, okulimaza impilo yembewu kanye nokuhluma kwayo. Isibonelo, inhlabathi ene-asidi ephezulu ingavimbela ukumuncwa kwezinto ezibalulekile njenge-phosphorus ne-calcium, kanti inhlabathi ene-alkaline inganciphisa ukutholakala kwe-iron ne-manganese, okuvimbe ukukhula kwezithombo.
6. Ukungaphumuli Kwembewu
Imbewu eziningi zibonisa ukungamili, isikhathi lapho zingamili naphezu kwezimo ezinhle. Lesi sici sivimbela ukumila ngezikhathi ezingafanele, okwandisa amathuba okusinda kwezithombo. Ukungamili imbewu kungaphulwa yizimpawu ezahlukene zemvelo, okuhlanganisa ukushintsha kwezinga lokushisa, ukukhanya, noma izimpawu zamakhemikhali.
Izindlela zokungalali zivame ukuba zezinhlobo ezithile, ezibandakanya ukusebenzisana okuyinkimbinkimbi phakathi kwabalawuli bamahomoni njenge-abscisic acid (ABA) kanye ne-gibberellins (GA). Ukuqonda nokusebenzisa lezi zilawuli kubalulekile ekwenzeni ngcono ukuhluma kwezolimo kanye nemikhuba yezolimo.
7. Ukuphila Kwembewu Nokuqina
Ukuphila kahle kwembewu kubhekisela ekhonweni lembewu lokuhluma ngaphansi kwezimo ezinhle, kuyilapho amandla ehlanganisa amandla embewu okuhluma nokukhula ngempumelelo. Zombili lezi zici zithonywa ukuvuthwa kwembewu, izimo zokugcina, kanye nobudala bayo.
Ukuvunwa nokugcinwa kwembewu ngendlela efanele kubalulekile ekugcineni impilo namandla. Imbewu kufanele ivunwe esigabeni esifanele sokuvuthwa futhi igcinwe ezimweni ezipholile nezomile ukuze kuvinjelwe ukuwohloka. Ukwelashwa kwembewu, njengokuyigcoba noma ukuyimboza ngezinto ezivikelayo, kungathuthukisa ukuhluma kwayo namandla ngokubhekana nezithiyo ezithile zomzimba noma zemvelo.
8. Ukutholakala Kwezakhamzimba
Nakuba imbewu iqukethe izakhamzimba zayo, ukutholakala kwamaminerali abalulekile enhlabathini ezungezile kungasekela izigaba zokuqala zokukhula. Izakhamzimba ezinkulu njenge-nitrogen, i-phosphorus, ne-potassium, kanye nezakhamzimba ezincane njenge-zinc ne-boron, zidlala indima ebalulekile ezinqubweni zamaseli ezibalulekile ekuhlumeni.
Umanyolo olinganiselayo ofanelana nezidingo ezithile zembewu ehlumayo ungaqinisa isigaba sokuqala sokukhula, uqinisekise ukukhula kwezithombo okuqinile. Kodwa-ke, ukusetshenziswa ngokweqile noma okungafanele komanyolo kungadala ukungalingani noma ubuthi, okuphazamisa ukuhluma.
9. Izinto Eziphilayo
Ukuba khona kwamagciwane, izinambuzane, kanye namagciwane awusizo kungathinta kakhulu ukuhluma kwembewu. Amagciwane anjengesikhunta namabhaktheriya angabangela ukubola kwembewu noma izifo eziqeda ukuhluma, okuthiya ukuhluma. Ngokuphambene nalokho, amagciwane awusizo anjengesikhunta se-mycorrhizal kanye namabhaktheriya alungisa i-nitrogen angakhuthaza ukumuncwa kwezakhamzimba futhi andise amandla ezithombo.
Ukwelashwa ngembewu ngama-fungicides noma ama-biostimulants, kanye nokuhlanganiswa kwemikhuba emihle yezolimo njengokujikeleza kwezitshalo kanye nokuphathwa kwempilo yenhlabathi, kunganciphisa imiphumela emibi ye-biotic futhi kukhuthaze ukusebenzisana okuzuzisayo.
Isiphetho
Ukuhluma kwembewu kuyinqubo enezici eziningi elawulwa ukuhlangana kwezici zemvelo, ezomzimba, kanye nezamakhemikhali. Ukuqonda lezi ziguquguquko kubaluleke kakhulu ekuthuthukiseni impumelelo yokuhluma, okunemiphumela ebanzi kwezolimo, ukulondolozwa kwemvelo, kanye nokuphathwa kwemvelo. Ngokusebenzisa ukuqonda ngezinto ezibangela ukuhluma kwembewu, singenza ngcono izimo zokukhula kwezitshalo, sinikele ekuphepheni kokudla, ekuqineni kwemvelo, kanye nokuphathwa okusimeme kwezinsiza zezitshalo.
