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Proceedings Paper

Use of reflectance spectroscopy for early detection of calcium deficiency in plants
Author(s): Bingqing Li; Liew Oi Wah; Anand Krishna Asundi
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Paper Abstract

This article investigates calcium deficiency symptoms of the plants grown under hydroponics conditions. Leaf reflectance data were collected from plants, and then transformed to L*, a*, b* values, which provide color information of the leaves. After comparing the color information of deficient plants to control plants, a set of deficiency criterion was established for early detection of calcium deficiency in the plants. Calcium deficiency could be detected as early as two days from the onset of stress in mature plants when optical data were collected from terminal young leaves. Young plants subjected to calcium stress for 9 days could not be distinguished from nutrient sufficient plants.

Paper Details

Date Published: 12 April 2005
PDF: 5 pages
Proc. SPIE 5852, Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics, (12 April 2005); doi: 10.1117/12.621886
Show Author Affiliations
Bingqing Li, Nanyang Technological Univ. (Singapore)
Liew Oi Wah, Singapore Polytechnic (Singapore)
Anand Krishna Asundi, Nanyang Technological Univ. (Singapore)


Published in SPIE Proceedings Vol. 5852:
Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics

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