In situ hyperspectral data analysis for pigment content estimation of rice leaves

• Published in: Journal of Zhejiang University. Science Vol. 4; no. 6; pp. 727 - 733
• Main Author: 程乾 黄敬峰 王秀珍 王人潮
• Format: Journal Article
• Language: English
• Published: China 01.11.2003
• Subjects: Agriculture - methods; Carotenoids - analysis; Carotenoids - metabolism; Chlorophyll - analysis; Chlorophyll - metabolism; Oryza - chemistry; Oryza - growth & development; Pigments, Biological - analysis; Pigments, Biological - metabolism; Plant Leaves - chemistry; Regression Analysis; Spectrum Analysis - methods; 原位光谱; 含量估计; 多光谱反射率
• ISSN: 1009-3095
• DOI: 10.1631/jzus.2003.0727

Analyses of the correlation between hyperspectral reflectance and pigment content including chlorephyll-a, chlorephyll-b and carotenoid of leaves in different sites of rice were reported in this paper. The hyperspectral reflectance of late rice during the whole growing season was measured using a Spectroradiometer with spectral range of 350 - 1050 nm and resolution of 3 nm. The chlorophyll-a, chlorephyll-b and carotenoid contents in rice leaves in rice fields to which different levels of nitrogen were applied were measured. The chlorephyll-a content of upper leaves was well correlated with the spectral variables. However, the correlation between both chlorephyll-b and careteniod and the spectral variables was far from that of chlorophyll-a. The potential of hyperspectral reflectance measurement for estimating chlorophyll-a of upper leaves was evaluated using univariate correlation and multivariate regression analysis methods with different types of predictors. This study showed that the most suitable estimated model of chlorephyll-a of upper leaves was obtained by using some hyperspectral variables such as SDr , SDb and their integration.