Paub txog koj qhov kev ntsuam xyuas av yog ib yam. Paub seb lub chaw kuaj mob tau txais cov lej li cas - thiab cov extractants uas nws siv - yog ib qho tseem ceeb rau kev txiav txim siab fertility.
Nick Ward, PhD, tus thawj tswj hwm ntawm Ward Laboratories, Kearney, Neb hais tias "Nyob ntawm Ward lub chaw kuaj mob, peb nyiam siv ntau yam kev hloov pauv thaum peb hloov cov ntsiab lus uas peb tab tom saib hauv av,"
"Raws li cov av sib txawv uas peb ua haujlwm nrog hauv peb cov neeg siv khoom, peb sim ua cov khoom sib txawv no kom haum zoo tshaj plaws thiab ua kom muaj kev sib tw ua si rau txhua tus," nws hais ntxiv.
Qhov "txawm tias ua si teb" tseem ceeb vim tias tsis yog tag nrho cov av - lossis cheeb tsam - coj zoo ib yam. Tus lej uas qhia txog cov lus teb ntawm cov chiv hauv ib hom av lossis ib puag ncig yuav txhais tau tias qee yam sib txawv hauv lwm qhov, nyob ntawm cov extractant siv.
Phosphorus yog ib qho piv txwv tseem ceeb
Phosphorus (P) yog ib qho tseem ceeb uas nkag siab txog cov extractants thiab qhov chaw uas lawv haum tuaj yeem pab koj txiav txim siab fertility zoo dua.
Ward Laboratories feem ntau siv Mehlich-3 ICP raws li nws cov txheej txheem extractant vim hais tias ntawm nws versatility nyob rau hauv ntau yam av textures thiab organic teeb meem theem.
"Thaum peb muaj Mehlich-3 tus nqi ntawm 18 feem ntawm ib lab ntawm P, txoj hauv kev rau cov lus teb los ntawm kev ntxiv cov chiv yog qhov zoo heev," Ward hais tias, nco ntsoov tias ntau xyoo ntawm kev tshawb fawb hauv tsev kawm ntawv khi cov lej tshwj xeeb rau cov txiaj ntsig tau tshwm sim.
1. Olsen P (Bicarbonate P):Nws yog feem ntau nyiam rau siab -pH, alkaline, thiab calcareous av ib yam ntawm Western US
Dan Kaiser, tus kws tshaj lij tswj kev noj qab haus huv nrog University of Minnesota Extension hais tias "Olsen test extract P siv sodium bicarbonate thiab yog qhov kev sim zoo tshaj plaws los siv rau cov xwm txheej uas cov av pH yog 7.4 lossis ntau dua," hais tias Dan Kaiser, tus kws tshaj lij tswj kev noj qab haus huv nrog University of Minnesota Extension, hauv tsab xov xwm no.
2. Bray-P1:Nws feem ntau siv me ntsis alkaline rau cov av acidic heev (pH ntawm 7.4 lossis tsawg dua). Kaiser hais tias Bray-P1 kuaj P1 rho tawm P nrog cov kua qaub thiab yog qhov kev sim nrov rau ntau tshaj 50 xyoo raws li cov ntaub ntawv txuas ntxiv qhia txog lub peev xwm ntawm Bray-P1 los kwv yees cov qoob loo teb rau P.
Kaiser ntxiv cov av ntawd-cov chaw kuaj sim siv Bray-P1 lossis Olsen feem ntau yuav khiav Olsen xeem ntawm qee qhov pH tau txais, uas ua rau nws yooj yim dua rau cov neeg ua liaj ua teb "vim koj tsis tas yuav txiav txim siab seb yuav siv qhov twg ua ntej koj xa cov qauv."
Matching Extractants rau Nutrients
Thaum Mehlich-3 qee zaum tau nce qib thoob ntiaj teb, Ward pom zoo nrog lwm tus kws tshaj lij uas cov khoom noj sib txawv tau txais txiaj ntsig zoo tshaj plaws los ntawm cov extractants sib txawv thiab kev sim.
Piv txwv li, thaum hloov kev tsom mus rau cov poov tshuaj (K) thiab lwm yam cations xws li calcium thiab magnesium, Ward Laboratories txav mus rau ammonium acetate, ib qho nruab nrab -pH tov.
Txoj kev no yog siv los txiav txim siab txog av Cation Exchange Capacity (CEC).
Ward piav qhia tias vim hais tias ammonium acetate yog nruab nrab, nws tiv thaiv overestimating cov as-ham uas tsob nroj tuaj yeem nqus tau. "Nws tsis yog ib qho tshuaj hnyav uas yuav ua rau peb ntau dhau ntawm cov khoom uas yuav tsis yog lwm yam uas cov nroj tsuag yuav pom," nws hais.
Rau cov micronutrients xws li zinc, hlau, thiab tooj liab, lub chaw kuaj mob siv DTPA, tus neeg sawv cev chelating.
Cov txheej txheem DTPA "grabs" micronutrient ions yog li lawv tuaj yeem ntsuas nrog qhov siab. Ward sau tseg tias nws "muaj kev ntseeg siab heev" hauv cov txiaj ntsig vim tias lawv tau txais kev txhawb nqa los ntawm ntau xyoo ntawm cov ntaub ntawv hais txog cov chiv teb.
Nug Lub Chaw Pabcuam lossis Koj Cov Lus Nug Muag Khoom
Rau cov neeg ua liaj ua teb thiab cov kws pab tswv yim, qhov tseem ceeb yog qhov kev ntsuam xyuas av thiab cov ntawv ceeb toom tsis yog txhua tus tsim sib npaug - txawm tias cov lej zoo sib xws ntawm daim ntawv. Paub qhov twg extractant ib lab siv, thiab vim li cas, yog qhov tseem ceeb rau kev txhais cov ntsiab lus kom raug thiab muab piv rau lawv nyob rau lub sijhawm, teb thiab cheeb tsam.
Rau cov neeg ua liaj ua teb thiab cov kws pab tswv yim qoob loo tab tom nrhiav kom tau txais txiaj ntsig zoo tshaj plaws ntawm lawv cov peev txheej hauv av, Ward muab peb cov lus pom zoo:
Qhia tus extractant:Paub seb txoj kev twg koj lub chaw kuaj mob siv rau txhua yam khoom noj tshwj xeeb.
Ua kom sib xws:Lo nrog tib txoj kev nyob rau ntau xyoo kom raug taug qab cov qauv thiab sib piv cov teb. Tsis txhob "mix and match" txoj kev.
Nrhiav kev sib haum xeeb hauv cheeb tsam:Siv cov extractant uas phim cov kev tshawb fawb calibrated ua los ntawm koj thaj av hauv zos -grant university.
Rau cov neeg ua liaj ua teb xav tau kev sim tshwj xeeb tsis pom nyob rau hauv cov ntawv qhia zaub mov, Ward txhawb kev sib txuas lus ncaj qha nrog koj lub chaw kuaj mob los xyuas koj cov kev xaiv.
