Raws li peb tau hais ua ntej, muaj 16 yam tsim nyog rau cov nroj tsuag kom tswj tau nws txoj kev loj hlob ib txwm. Xws li: rau ntau yam ntawm cov ntsiab lus: carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium; Peb cov ntsiab lus nruab nrab: calcium, magnesium, sulfur; 7 kab kawm: hlau, zinc, manganese, tooj liab, boron, molybdenum, chlorine. Ib yam li peb tau mob los ntawm qhov tsis muaj qee yam khoom noj, qhov tsis muaj qee yam hauv lub sijhawm cog qoob loo tuaj yeem ua rau cov tsos mob tsis zoo.
Piv txwv li, cov kab mob tsis txaus: nitrogen deficiency inhibits kev loj hlob ntawm cov nroj tsuag, cov nplooj qub ua ntej daj thiab cov nplooj tshiab nyias; Cov nroj tsuag tsis muaj phosphorus muaj tsawg dua tillers thiab nplooj tshiab yog ntsuab tsaus thiab cov nplooj qub yog ntshav. Hlau deficiency thiab poob ntawm ntsuab apical ua ntej, cov leeg hluas thawj daj thiab lwm yam. Ntawm 16 lub ntsiab lus no, carbon, hydrogen, oxygen, thiab chlorine yog muab los ntawm huab cua thiab dej, thaum so yog absorbed los ntawm cov hauv paus hniav los ntawm rhizosphere. Yog li ntawd, cov zaub mov npaj yuav tsum muaj cov khoom noj uas tseem tshuav. Cov khoom noj khoom haus yuav tsum tau absorbed los ntawm cov nroj tsuag, yuav tsum tau npaj cov as-ham ntawm fertilizer nyob rau hauv dej muaj ib tug zoo solubility, nyob rau hauv lub xeev ntawm ions. Lawv feem ntau yog cov ntsev inorganic, tab sis kuj muaj qee cov organic chelates. Cov organic chiv uas tsis tuaj yeem nqus tau ncaj qha thiab siv los ntawm cov nroj tsuag yuav tsum tsis txhob siv los ua cov khoom noj khoom haus.
Tus nqi thiab kev faib ua feem ntawm txhua lub ntsiab lus nyob rau hauv cov kev daws teeb meem yuav tsum ua tau raws li cov kev cai ntawm cov nroj tsuag kev loj hlob thiab kev loj hlob thiab yuav tsum tau physiologically balanced los xyuas kom meej tag nrho cov kev ua si ntawm cov hauj lwm zoo ntawm txhua cov as-ham thiab qhov sib npaug ntawm cov nroj tsuag nqus. Hauv kev txiav txim siab muaj pes tsawg leeg ntawm kev daws teeb meem, cov chiv hom yuav tsum muaj tsawg li tsawg tau raws li qhov ua tau kom ua tiav ntau yam ntawm cov ntsiab lus tseem ceeb rau cov nroj tsuag, txhawm rau tiv thaiv cov tebchaw los ntawm kev coj mus rau hauv cov nroj tsuag thiab ua rau ntau dhau ions lossis lwm yam tsis zoo. .
Tag nrho cov concentration (ntsev concentration) nyob rau hauv cov zaub mov tov yuav tsum haum rau ib txwm cog kev loj hlob. Cov khoom noj muaj txiaj ntsig ntau yam hauv cov khoom noj khoom haus yuav tsum tau khaws cia rau hauv lawv lub xeev zoo rau lub sijhawm ntev hauv cov txheej txheem cog qoob loo. Nws cov txiaj ntsig tsis txo qis hauv lub sijhawm luv luv vim yog oxidation ntawm cov as-ham, cov hauv paus nqus thiab ion kev cuam tshuam.