Scaling up of leaf stomatal resistance as a function of photosynthetic photon flux density

Suat Irmak, Denis Mutiibwa, Ayse Irmak, Timothy J. Arkebauer, Albert Weiss, Derrel L. Martin, Dean E. Eisenhauer

Research output: Contribution to conferencePaperpeer-review


This study presents a combined approach to scale up leaf stomatal resistance (rL) to canopy resistance (rc). We integrated several methodologies and demonstrated a successful application of an approach to scale up rL to rc for subsurface drip-irrigated field corn (Zea mays L). We scaled up rL using measured photosynthetic photon flux density (PPFD) as the main driver. PPFD alone was able to explain 85% of the variability in rc. The average root mean square difference between the measured and estimated rc was 11.1 s m-1. Results are very encouraging as the PPFD versus rc approach to scale up the rL to rc does not account for other variables such as vapor pressure deficit, carbon dioxide concentration, wind speed, and soil evaporation. This integration and application of scaling up approach should aid to our understanding of the rc-PPFD relationships and dynamics of the soil-canopy-atmosphere continuum and contribute to better estimate evaporative losses from plant communities using one-step approach.

Original languageEnglish (US)
StatePublished - 2007
Event2007 ASABE Annual International Meeting, Technical Papers - Minneapolis, MN, United States
Duration: Jun 17 2007Jun 20 2007


Other2007 ASABE Annual International Meeting, Technical Papers
Country/TerritoryUnited States
CityMinneapolis, MN

All Science Journal Classification (ASJC) codes

  • General Agricultural and Biological Sciences
  • General Engineering


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