The red edge position and shape as indicators of plant chlorophyll content, biomass and hydric status.

作者：Iolanda Filella, Josep Peñuelas · 发表于：International Journal of Remote Sensing · 年份：1994 · DOI：10.1080/01431169408954177 · 被引用次数：826 · 研究领域：Remote Sensing in Agriculture、Leaf Properties and Growth Measurement、Light effects on plants

Some red edge parameters in the first derivative reflectance curve (wavelength, amplitude and area of the red edge peak) were studied to evaluate plant chlorophyll content, biomassand RelativeWater Content (RWC).Plants of Capsicum annuum and Phaseolus vulgaris under different nitrogen and water availabilities, and plants of Gerbera jamesonii with different hydric status were studied. A high correlation was found between chlorophyll content and the wavelength of the red edge peak (λre ), and between LAI (leaf area index)and the amplitude of the red edge peak (drr e ), but the area of the red edge peak (σ680–780 nm) was the best estimator of LAI. Thus, red edge was found valuable for assessment of plant chlorophyll concentration and LAI, and therefore nutritional status. Water stress also affected drre, but only when the stress was well developed.