Improving indirect measurements of the leaf area index using canopy height
نویسندگان
چکیده
منابع مشابه
Using direct and indirect measurements of leaf area index to characterize the shrub canopy in an ombrotrophic peatland
Leaf area index (LAI) is an important ecological parameter that characterizes the interface between a vegetation canopy and the atmosphere. Indirect measurements of LAI using optical techniques such as the LAI-2000 plant canopy analyzer have been routinely conducted for different vegetation canopies including forests and agricultural crops. However, little attention has been paid to shrub canop...
متن کاملPlant canopy gap-size analysis theory for improving optical measurements of leaf-area index.
Optical instruments currently available for measuring the leaf-area index (LAI) of a plant canopy all utilize only the canopy gap-fraction information. These instruments include the Li-Cor LAI-2000 Plant Canopy Analyzer, Decagon, and Demon. The advantages of utilizing both the canopy gap-fraction and gap-size information are shown. For the purpose of measuring the canopy gap size, a prototype s...
متن کاملLeaf area index measurements
Leaf area index (LAI) is a key structural characteristic of forest ecosystems because of the role of green leaves in controlling many biological and physical processes in plant canopies. Accurate LA1 estimates are required in studies of ecophysiology, atmosphere-ecosystem interactions, and global change. The objective of this paper is to evaluate LA1 values obtained by several research teams us...
متن کاملEstimation of forest aboveground biomass in California using canopy height and leaf area index estimated from satellite data
a Bay Area Environmental Research Institute (BAERI)/NASA Ames Research Center, Moffett Field, CA 94035, USA b NASA Advanced Supercomputing Division, NASA Ames Research Center, Moffett Field, CA 94035, USA c Nature Publishing Group, San Francisco, CA, USA d Department of Science and Environmental Policy, California State University at Monterey Bay/NASA Ames Research Center, Moffett Field, CA 940...
متن کاملEstimation of Leaf Area Index and Plant Area Index of a Submerged Macrophyte Canopy Using Digital Photography
Non-destructive estimation using digital cameras is a common approach for estimating leaf area index (LAI) of terrestrial vegetation. However, no attempt has been made so far to develop non-destructive approaches to LAI estimation for aquatic vegetation. Using the submerged plant species Potamogeton malainus, the objective of this study was to determine whether the gap fraction derived from ver...
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ژورنال
عنوان ژورنال: Pesquisa Agropecuária Brasileira
سال: 2020
ISSN: 1678-3921,0100-204X
DOI: 10.1590/s1678-3921.pab2020.v55.01894