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Proceedings Paper

The comparison for leaf nitrogen estimating in rice by chlorophyll meters and reflectance spectroscopy
Author(s): Fenfang Lin; Ke Wang
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Paper Abstract

Handheld chlorophyll sensors is a very important technique to determine the timing and number of N applications, which can improve the fertilizer-N use efficiency and monitor leaf N status of irrigated rice. One solution-culture and two field experiments with four rice genotypes were conducted to obtain variables reflecting nitrogen (N) status at different developmental stages. The paper systemically compared SPAD indices calculated from the SPAD readings of various leaf positions and hyperspectral vegetation indices. The results showed that the indices RSI and RDSI were more reliable SPAD indices for estimating foliar N status in rice plant; In addition, from view of quickness and cheapness, chlorophyll meters are more suitable for estimating foliar N status in rice than reflectance spectroscopy on the basis of meeting accuracy requirements.

Paper Details

Date Published: 4 March 2013
PDF: 7 pages
Proc. SPIE 8761, PIAGENG 2013: Image Processing and Photonics for Agricultural Engineering, 87610Y (4 March 2013); doi: 10.1117/12.2020292
Show Author Affiliations
Fenfang Lin, Nanjing Univ. of Information Science and Technology (China)
Ke Wang, Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 8761:
PIAGENG 2013: Image Processing and Photonics for Agricultural Engineering
Honghua Tan, Editor(s)

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