Yog tias koj tab tom nrhiav kom nkag siab txog qhov sib piv ntawm cov teeb pom kev zoo li cas, koj yuav tau hla cov kev ntsuas PPF thiab PPFD.
Txawm li cas los xij, tej zaum koj yuav tsis meej pem txog qhov kev ntsuas no txhais li cas, thiab koj tuaj yeem nkag siab lawv li cas los txiav txim siab yuav khoom. Hauv kab lus no peb mus dhau qhov sib txawv ntawm PPF thiab PPFD.
Qhov txawv ntawm PPF thiab PPFD los ntawm kev txhais
PPF thiab PPFD yog ob qho tib si luv luv uas cuam tshuam nrog lub teeb rau lub teeb lossis qhov chaw:
PPF - photosynthetic photon flux
PPFD - photosynthetic photon flux ceev
Dab tsi yog qhov photosynthetic photon? Lub photon yog ib qho me me ntawm lub teeb, thiab tuaj yeem ua rau ntau yam wavelengths. Cov uas muaj peev xwm pab tau photosynthesis yog suav hais tias yog photosynthetic photon.
Tshwj xeeb, qhov no suav nrog photons nrog wavelengths ntawm 400 nm thiab 700 nm.
PPF thiab PPFD ntsuas qhov ntau ntawm cov photons. Qhov sib txawv tseem ceeb yog PPFD ntsuas qhov ntom ntawm cov photons ntog ntawm ib qho chaw, thaum PPF yog ib qho kev ntsuas ntawm tag nrho cov photons tso tawm los ntawm lub teeb.
Hauv peb cov duab hauv qab no, txhua lub dot sawv cev rau ib qho photosynthetic photon. PPFD yog tus naj npawb ntawm photons uas tsaws ntawm ib qho chaw, thaum PPF yog tag nrho cov photons uas tau tso tawm los ntawm lub teeb ci.
Daim duab yuav tsum nthuav tawm ob qho khoom ntxiv txog PPFD.
Ua ntej, qhov ze rau lub teeb ci, qhov siab dua qhov kev nyeem PPFD. Qhov no yog vim lub dispersion ntawm lub teeb thaum ib tug txav deb ntawm lub teeb qhov chaw.
Qhov thib ob, qhov nruab nrab ntawm lub nqaj feem ntau muaj qhov siab tshaj PPFD nyeem ntawv. Thaum koj tsiv mus deb ntawm qhov chaw, PPFD yuav txo qis.
