Measurement of tree canopy architecture
作者:
S.N. MARTENS,
S.L. USTIN,
J.M. NORMAN,
期刊:
International Journal of Remote Sensing
(Taylor Available online 1991)
卷期:
Volume 12,
issue 7
页码: 1525-1545
ISSN:0143-1161
年代: 1991
DOI:10.1080/01431169108955187
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The lack of accurate, extensive geometric data on tree canopies has retarded development and validation of radiative transfer models. Wc have devised a stratified sampling method to measure the three-dimensional geometry of 16 walnut trees which had received irrigation treatments of either 100 or 33 per cent of evapotranspirational (ET) demand for the previous two years. Graphic reconstructions of the three-dimensional geometry were verified by 58 independent measurements. The distributions of stem- and leaf-size classes, lengths. and angle classes were determined and used to calculate leaf area index (LAI), stem area, and biomass. Reduced irrigation trees have lower biomass of stems, leaves and fruit, lower LAI, steeper leaf angles and altered biomass allocation to large stems. These data can be used in ecological models that link canopy processes with remotely sensed measurements.
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