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Estimating LAI in deciduous forest stands

Author:
  • Helena Eriksson
  • Lars Eklundh
  • Karin Hall
  • Anders Lindroth
Publishing year: 2005
Language: English
Pages: 27-37
Publication/Series: Agricultural and Forest Meteorology
Volume: 129
Issue: 1-2
Document type: Journal article
Publisher: Elsevier

Abstract english

The leaf area index (LAI), was estimated in deciduous forests of southern Sweden using different estimation techniques. The effective LAI (L-e) was estimated optically by measurements with the gap fraction instrument LAI-2000 and corrections for the aggregation of leaves were achieved by using the TRAC (Tracing Radiation and Architecture of Canopies) instrument. Two methods for correcting the contribution of the woody material were tested. The aim was to find the most reliable estimation technique, and therefore the measurements were compared with LAI estimated from litter fall collection. Optically estimated L-e was correlated with litter trap LAI, indicating that L-e can be used as an estimate of LAI in deciduous forests of the same characteristics as tested here. The litter fall collection technique involves knowledge about the specific leaf area (SLA). Since, we found that SLA varied between leaves picked from top positioned branches and leaves picked from low positioned branches as well as between different species, we suggest some caution when interpreting the values.

Keywords

  • Physical Geography
  • litter fall collection
  • TRAC
  • specific leaf area (SLA)
  • forest
  • deciduous
  • forest ecosystem
  • leaf area index (LAI)
  • leaf aggregation

Other

Published
  • ISSN: 1873-2240
E-mail: lars [dot] eklundh [at] nateko [dot] lu [dot] se

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Dept of Physical Geography and Ecosystem Science

+46 46 222 96 55

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Dept of Physical Geography and Ecosystem Science

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Department of Physical Geography and Ecosystem Science
Lund University
Sölvegatan 12
S-223 62 Lund
Sweden

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