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Effects of N, K Fertilization on the Relationship between Photosynthetic Light Use Efficiency and Photochemical Reflectance Index (PRI)

文献类型： 外文期刊

作者： Wu Chao-yang 1 ; Niu Zheng 1 ; Tang Quan 1 ; Huang Wen-jiang 3 ;

作者机构： 1.Chinese Acad Sci, Inst Remote Sensing Applicat, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China

2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

3.Natl Engn Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

关键词： Photochemical reflectance index (PRI); Light use efficiency (LUE); Nitrogen; Kalium; Precision agriculture

期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.589； 五年影响因子：0.504 ）

ISSN： 1000-0593

年卷期： 2009 年 29 卷 2 期

页码：

收录情况： SCI

摘要： PRI (Photochemical reflectance index) has provided a fast and reliable method for estimating photosynthetic light use efficiency across species. Increasing efforts have been paid to explore the effects of such disturbances as water content and CO2 concentration on the relationship between PRI and LUE. In the present paper, five types of wheat with different nitrogen and kalium fertilization were selected to study the influence of varied fertilization levels on the relationship between PRI and LUE. The results proved that leaf chlorophyll contents as well as canopy PRI increased with the increase in nitrogen and kalium fertilization. For all the nitrogen and kalium fertilization of wheat, the regression coefficients R-2 are 0. 710 4 and 0. 853 4 respectively. When considering different levels of fertilization, the regression coefficients R-2 are 0. 602 0, 0. 640 4 and 0. 801 4 for three types of nitrogen fertilization, and 0. 379 1, 0. 640 4 and 0. 676 9 for kalium fertilization. Therefore PRI not only can be a reliable indicator of LUE but also can reflect the fertilization situation of wheat with different precisions of LUE assessment which can provide important reference for management and precision agriculture.

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