基于光谱指数和偏最小二乘的棉花类胡萝卜素/叶绿素<i>a</i>比值估算

基于光谱指数和偏最小二乘的棉花类胡萝卜素/叶绿素a比值估算

易秋香,刘英,常存,钟瑞森

Estimation of cotton Car/Chla ratio by hyperspectral vegetation indices and partial least square regression

Qiu-Xiang YI,Ying LIU,Cun CHANG,Rui-Sen ZHONG

表1 所采用的光谱指数

Table 1 Vegetation indices used for Car/Chla ratio and carotenoids estimation

指数 Index	全称 Full name	表达式 Formula	文献 Reference
PRI	Photochemical Reflectance Index	(R531-R570)/(R531+R570)	[27]
PRI*CI	Carotenoid/Chlorophyll Ratio Index	(R531-R570)/(R531+R570)*((R760/R700)-1))	[23]
PSRI	Plant senescence reflectance index	(R678-R500)/R750	[16]
R₅₁₅/R₅₇₀	Simple ratio vegetation index	R515/R570	[24]
CCRI	Combined carotenoid/chlorophyll ratio index	(R720-R521)R705/(R750-R705)R521	[25]