Measuring X Value (13385-00 AN)

January 11, 2007

• Products:
  • AccuPAR LP-80,
  • Environmental Instruments

The LP80 makes fast, direct measurements of photosynthetically active radiation in canopies. You get instant PAR measurements when you turn it on. You also get a measurement of leaf area index – LAI. But where does this LAI measurement come from, and how accurate is it? Leaf area index is the one-sided green leaf area of a canopy or plant community per unit ground area. To directly measure LAI, you would have to measure the area of each leaf in the canopy above a unit of ground area. Because this method is both destructive and incredibly time consuming, it is rarely used.

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