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18 November 2014 Effect of nitrogen stress on relationship of PRI and LUE during winter wheat growth period
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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.
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Jianmao Guo, Yanghua Gao, Qian Wang, Dunyue Fei, and Junwei Liu "Effect of nitrogen stress on relationship of PRI and LUE during winter wheat growth period", Proc. SPIE 9263, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications V, 92631A (18 November 2014); https://doi.org/10.1117/12.2068297
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