A NARROW-WAVEBAND SPECTRAL INDEX THAT TRACKS DIURNAL CHANGES IN PHOTOSYNTHETIC EFFICIENCY

被引：1770

作者：

GAMON, JA ^{[1
]}

PENUELAS, J ^{[1
]}

FIELD, CB ^{[1
]}

机构：

[1] CARNEGIE INST WASHINGTON,DEPT PLANT BIOL,STANFORD,CA 94305

来源：

REMOTE SENSING OF ENVIRONMENT | 1992年 / 41卷 / 01期

基金：

美国安德鲁·梅隆基金会;

关键词：

D O I：

10.1016/0034-4257(92)90059-S

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We present a new "physiological reflectance index" (PRI) isolated from narrow waveband spectral measurements of sunflower canopies. This index correlates with the epoxidation state of the xanthophyll cycle pigments and with the efficiency of photosynthesis in control and nitrogen stress canopies, but not in water stress canopies undergoing midday wilting. It is analogous in formulation to the broadband normalized difference vegetation index (NDVI) and uses reflectance at 531 nm and at a reference wavelength to minimize complications associated with diumal sun angle changes. In conjunction with other methods, this index may lead to improved remote and ground-based estimates of canopy photosynthetic function.

引用

页码：35 / 44

页数：10

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