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Proceedings Paper

Effect of nitrogen stress on relationship of PRI and LUE during winter wheat growth period
Author(s): Jianmao Guo; Yanghua Gao; Qian Wang; Dunyue Fei; Junwei Liu
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Paper Abstract

Light use efficiency (LUE ) is an important parameter for GPP and and NPP estimation model, cause by the existing model method to estimate the actual LUE is always simple and rough, which may lead to serious bias by GPP and NPP. The photochemical reflectance index ( PRI ) has great potential for direct estimation the actual LUE. In this paper, wheat in different nitrogen treatments was designed in field trial during Wheat growing period, for obtain photosynthesis and reflective hyperspectral data, and then LUE and PRI was calculated in critical period of wheat growth. The results show that, at different growth stages under three different nitrogen conditions, LUE and PRI value were significantly increased with increasing nitrogen absorption; Last longer, more capable of absorbing nitrogen amount, the correlation between LUE and PRI was better,for example, the correlation coefficient is obviously larger in heading stage than elongation stage for same nitrogen treatment.

Paper Details

Date Published: 18 November 2014
PDF: 8 pages
Proc. SPIE 9263, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications V, 92631A (18 November 2014); doi: 10.1117/12.2068297
Show Author Affiliations
Jianmao Guo, Chongqing Institute of Meteorological Sciences (China)
Nanjing Univ. of Information Science and Technology (China)
Yanghua Gao, Chongqing Institute of Meteorological Science (China)
Qian Wang, Nanjing Univ. of Information Science and Technology (China)
Dunyue Fei, Nanjing Univ. of Information Science and Technology (China)
Junwei Liu, Nanjing Univ. of Information Science and Technology (China)


Published in SPIE Proceedings Vol. 9263:
Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications V
Allen M. Larar; Makoto Suzuki; Jianyu Wang, Editor(s)

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