A comparison of different methods for assessing leaf area index in four canopy types

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F19%3A00508642" target="_blank" >RIV/86652079:_____/19:00508642 - isvavai.cz</a>

Result on the web

<a href="https://www.researchgate.net/publication/332752868_A_comparison_of_different_methods_for_assessing_leaf_area_index_in_four_canopy_types/link/5cc80bd2a6fdcc1d49b9b33a/download" target="_blank" >https://www.researchgate.net/publication/332752868_A_comparison_of_different_methods_for_assessing_leaf_area_index_in_four_canopy_types/link/5cc80bd2a6fdcc1d49b9b33a/download</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/forj-2019-0011" target="_blank" >10.2478/forj-2019-0011</a>

Result language

angličtina

Original language name

A comparison of different methods for assessing leaf area index in four canopy types

Original language description

The agreement of Leaf Area Index (LAI) assessments from three indirect methods, i.e. the LAI-2200 Plant Canopy Analyzer, the SS1 SunScan Canopy Analysis System and Digital Hemispherical Photography (DHP) was evaluated for four canopy types, i.e. a short rotation coppice plantation (SRC) with poplar, a Scots pine stand, a Pedunculate oak stand and a maize field. In the SRC and in the maize field, the indirect measurements were compared with direct measurements (litter fall and harvesting). In the low LAI range (0 to 2) the discrepancies of the SS1 were partly explained by the inability to properly account for clumping and the uncertainty of the ellipsoidal leaf angle distribution parameter. The higher values for SS1 in the medium (2 to 6) to high (6 to 8) ranges might be explained by gap fraction saturation for LAI-2200 and DHP above certain values. Wood area index-understood as the woody light-blocking elements from the canopy with respect to diameter growth-accounted for overestimation by all indirect methods when compared to direct methods in the SRC. The inter-comparison of the three indirect methods in the four canopy types showed a general agreement for all methods in the medium LAI range (2 to 6). LAI-2200 and DHP revealed the best agreement among the indirect methods along the entire range of LAI (0 to 8) in all canopy types. SS1 showed some discrepancies with the LAI-2200 and DHP at low (0 to 2) and high ranges of LAI (6 to 8).

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40102 - Forestry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Central European Forestry Journal

ISSN

2454-034X

e-ISSN

—

Volume of the periodical

65

Issue of the periodical within the volume

2

Country of publishing house

PL - POLAND

Number of pages

14

Pages from-to

67-80

UT code for WoS article

000467562700001

EID of the result in the Scopus database

—