ppfd造句

• In other words, DLI describes the sum of the per second PPFD measurements during a 24-hour period.
• The photon-weighted curve is for converting PPFD to YPF; the energy-weighted curve is for weighting PAR expressed in watts or joules.
• The amount of isoprene released from isoprene-emitting vegetation depends on leaf mass, leaf area, light ( particularly photosynthetic photon flux density, or PPFD ) and leaf temperature.
• :: : Unless global warming does at least 10, 000 years worth of erosion to the Canadian shield and increases PPFD, warmer weather will not open up any land in Canada for agriculture.
• If the exact spectrum of the light is known, the photosynthetic photon flux density ( PPFD ) values in & mu; mol / s can be modified by applying different weighting factor to different wavelengths.
• Therefore plant biologists often quantify PAR using the number of photons in the 400-700 nm range received by a surface for a specified amount of time, or the Photosynthetic Photon Flux Density ( PPFD ).
• Therefore, plant biologists often quantify PAR using the number of photons in the 400-700 nm range received by a surface for a specified amount of time, or the Photosynthetic Photon Flux Density ( PPFD ).
• :: : : : PPFD-photosynthetic photon flux density, or the related, Photosynthetically active radiation, here's a world map of PAR by month, Even in July, light levels are too low in the northern half of Canada for plant agriculture.
• In controlled environment studies, the optimum average daily temperature for leave growth for " E . novogranatense " var . " novogranatense " was found to be around, whereas leaf growth was generally higher at photosynthetic photon flux densities ( PPFD ) of 250 or 400 micromol per meter square per second than at 155 micromol per meter square per second.
• DLI is usually calculated by measuring the Photosynthetic Photon Flux Density ( PPFD ) in ?mol穖  " 2 穝  " 1 ( number of photons in the PAR range received in a square meter per second ) as it changes throughout the day, and then using that to calculate total estimated number of photons in the PAR range received over a 24-hour period for a specific area.