Photosynthetically Active Photon Flux Density

When Photosyntetically Active Photon Flux Density , short PFD or PPFD, is the current density of photons in the photosynthetically active solar spectrum . It is usually given in µmol (photons) / (m²s). It is above all a common unit in botany that is specified in the range of wavelengths from 400 to 700 nm. PFD is not to be confused with PAR ( Photosynthetically Active Radiation ).

Individual evidence

↑ M. Schmitt, M. Bahn, G. Wohlfahrt, U. Tappeiner, A. Cernusca: Land use affects the net ecosystem CO (2) exchange and its components in mountain grasslands. In: Biogeosciences . Volume 7, Number 8, August 2010, pp. 2297-2309, ISSN 1726-4170 . doi : 10.5194 / bg-7-2297-2010 . PMID 23293657 . PMC 3535888 (free full text).

[1] M. Schmitt, M. Bahn, G. Wohlfahrt, U. Tappeiner, A. Cernusca: Land use affects the net ecosystem CO (2) exchange and its components in mountain grasslands. In: Biogeosciences . Volume 7, Number 8, August 2010, pp. 2297-2309, ISSN 1726-4170 . doi : 10.5194 / bg-7-2297-2010 . PMID 23293657 . PMC 3535888 (free full text).