Agronomists thiab cov kws tshawb fawb hauv av npaj cov kev coj ua zoo tshaj plaws rau cov neeg ua liaj ua teb los pab lawv txiav txim siab paub txog kev tswj hwm lawv cov teb thiab cov qoob loo. Rintaro Kinoshita thiab ib pab neeg tshawb fawb tau txiav txim siab tias cov cuab yeej xws li "Tshem Hluav Taws Xob Hluav Taws Xob (ECa) Sensor" tuaj yeem muab cov ntaub ntawv tseem ceeb txog kev ua liaj ua teb, cov ntawv ceeb toom official lub vev xaib ntawm American Society of Agronomy.
Kinoshita yog tus pab xibfwb ntawm Obihiro University of Agriculture thiab Veterinary Medicine, Nyiv, tab sis tau ua qhov kev tshawb fawb no thaum nyob hauv Cornell University, Tebchaws Asmeskas.
Tshawb nrhiav tau luam tawm Nyob rau hauv Agronomy Journal, ib qho kev tshaj tawm ntawm American Society of Agronomy.
Tau kawg, cov av thiab nws cov yam ntxwv yog ib qho tseem ceeb tshaj plaws rau kev ua liaj ua teb. Spatial variation nyob rau hauv cov qoob loo yields yog heev nyob ntawm peb yam: topography, av, thiab kab/kab kab mob.
Cov neeg ua liaj ua teb feem ntau vam khom cov av kom nkag siab txog cov av, tab sis lawv siv sijhawm thiab kim heev. Kinoshita thiab pab pawg tau siv cov cuab yeej sensor uas tso cai rau lawv khaws ntau yam qoob loo thiab cov ntaub ntawv av yam tsis tau khawb av. Cov sensors no tuaj yeem nqa nrog cov khoom siv ua liaj ua teb xws li tsheb laij teb thiab muab cov ntaub ntawv tseem ceeb. Txhawm rau ntsuas cov ntaub ntawv, cov kws tshawb fawb tau muab cov ntaub ntawv los ntawm lawv cov sensors nrog cov txiaj ntsig ntawm kev txheeb xyuas cov qauv av.
Txoj kev tshawb no tau ua nyob rau thaj tsam ntawm xeev Maryland thiab Delaware (cov cheeb tsam ntawm ntug dej hiav txwv Lowland thiab Piedmont Plateau). Pab neeg tshawb nrhiav 26 pob kws teb hauv ob qhov sib txawv ntawm thaj chaw thiab cov ntsiab lus.
Qhov pom tseeb hluav taws xob conductivity (ECa) sensor tau ua pov thawj tias yog qhov ua tau zoo tshaj plaws hauv kev ntsuas cov av piv rau cov qauv hauv av. Cov sensors no muaj peev xwm kwv yees cov qauv av, tshwj xeeb tshaj yog nyob rau qhov sib txawv qhov tob, thiab muaj cov ntsiab lus dej. Txij li cov dej tsuas yog theem ua haujlwm xwb, kev ntsuas ntawm cov av uas cuam tshuam rau kev muaj dej tuaj yeem kwv yees siv ECa. Cov kev ntsuas ntsig txog av noo thiab cov qoob loo ntawm pob kws, uas yog cov ntaub ntawv tseem ceeb rau cov neeg ua liaj ua teb.
Pab neeg no kuj tau sim lwm yam thev naus laus zis, tab sis cov txiaj ntsig tsis yog qhov tseeb raws li qhov pom tseeb ntawm cov khoom siv hluav taws xob. Qhov zoo ntawm kev ntes cov ntaub ntawv ntsuas nrog sensors yog tias nws ua tiav sai, feem ntau siv 1-2 teev rau txhua tsib caug daim av. Ntawm qhov tod tes, kev ntsuam xyuas cov tub ntxhais hauv av tuaj yeem siv sijhawm ntau lub lis piam lossis qee lub hlis, nyob ntawm cov av.
Kinoshita piav qhia tias txhawm rau txhawm rau tswj cov qoob loo zoo dua, nws yog ib qho tseem ceeb uas yuav tau pib ua tib zoo saib xyuas cov txheej txheej ntawm cov av, thiab ECa sensor tuaj yeem pab tau zoo rau qhov no.
Txoj kev tshawb no tau txhawb nqa los ntawm Willard Agri-Service ntawm Frederick, Inc. txhawb nqa los ntawm Joint Japan/World Bank Graduate Scholarship Program.
Tsis tas li ntawd, Obihiro University tab tom koom tes hauv ib qho kev sib pauv kev paub txog agronomic virtual nrog University of Wisconsin-Madison. Ob thaj tsam Obihiro hauv Nyiv thiab Wisconsin hauv Tebchaws Meskas cog qoob loo tib yam: qos yaj ywm thiab taum pauv. Qhov kev zov me nyuam tsom rau kev noj zaub mov zoo thiab kev tshawb fawb hauv av.