title: In situ hyperspectral data analysis for pigment content estimation of rice leaves.
abstract: Analyses of the correlation between hyperspectral reflectance and pigment content including chlorophyll-a, chlorophyll-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, chlorophyll-b and carotenoid contents in rice leaves in rice fields to which different levels of nitrogen were applied were measured. The chlorophyll-a content of upper leaves was well correlated with the spectral variables. However, the correlation between both chlorophyll-b and caroteniod 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 chlorophyll-a of upper leaves was obtained by using some hyperspectral variables such as SD(r), SD(b) and their integration.
authors.affiliation: Institute of Agricultural Remote Sensing & Information Application, Zhejiang University, Hangzhou 310029, China. qiancheng525@yahoo.com.cn
authors.forename: Qian
authors.initials: Q
authors.lastname: Cheng
authors.forename: Jing-feng
authors.initials: JF
authors.lastname: Huang
authors.forename: Xiu-zhen
authors.initials: XZ
authors.lastname: Wang
authors.forename: Ren-chao
authors.initials: RC
authors.lastname: Wang
mesh_terms: D000383:Agriculture / Q000379:methods; D002338:Carotenoids / Q000032:analysis / Q000378:metabolism; D002734:Chlorophyll / Q000032:analysis / Q000378:metabolism; D000077194:Chlorophyll A; D012275:Oryza / Q000737:chemistry* / Q000254:growth & development; D010860:Pigments, Biological / Q000032:analysis* / Q000378:metabolism*; D018515:Plant Leaves / Q000737:chemistry*; D012044:Regression Analysis; D013057:Spectrum Analysis / Q000379:methods
chemical_list: D010860:Pigments, Biological; D002734:Chlorophyll; D002338:Carotenoids; C037184:chlorophyll b; D000077194:Chlorophyll A