SPECTRAL RESPONSE OF A PLANT CANOPY WITH DIFFERENT SOIL BACKGROUNDS
SPECTRAL RESPONSE OF A PLANT CANOPY WITH DIFFERENT SOIL BACKGROUNDS
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DOI：
10.1016/0034-4257(85)90111-7
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发表时间：
1985-01-01
影响因子：
13.5
通讯作者：
POST, DF
中科院分区：
文献类型：
--
作者：
HUETE, AR;JACKSON, RD;POST, DF
棉花的光谱特性[j]。在不同植被密度下，对4种土壤类型交替插入的DPL-70]冠层进行了研究。将实测的代表不同土壤背景下各种混合植被的复合光谱与现有的绿度指标（包括近红外-红波段比、垂直植被指数（PVI）和绿度植被指数（GVI））进行了比较。在不同土壤背景下，当植被数量不变时，观测到的光谱模式既不能用比值法解释，也不能用正交绿度法预测。所有的绿度指标都强烈依赖于土壤亮度。此外，随着植被的增加，土壤引起的绿化率变化变得更大，绿化率达到60%。土壤和植物光谱以非加性、部分相关的方式相互混合，产生复合冠层光谱。
The spectral behavior of a cotton [Gossypium hirsutum cv. DPL-70] canopy with 4 soil types alternately inserted underneath was examined at various levels of vegetation density. Measured composite spectra, representing various mixtures of vegetation with different soil backgrounds, were compared with existing measures of greenness, including the near-IR-red band ratios, the perpendicular vegetation index (PVI), and the greenness vegetation index (GVI). Observed spectral patterns involving constant vegetation amounts with different soil backgrounds could not be explained or predicted by either the ratio or the orthogonal greenness measures. All greenness measures were strongly dependent on soil brightness. Furthermore, soil-induced greenness changes became greater with increasing amounts of vegetation up to 60% green cover. Soil and plant spectra interactively mix in a nonadditive, partly correlated manner to produce composite canopy spectra.