DESIGN OF A SIMPLE INSTRUMENT FOR THE MEASUREMENT OF RED FAR-RED RATIOS

被引：0
|
作者：
METHY, M
FABREGUETTES, J
JARDON, F
ROY, J
机构：
来源：
ACTA OECOLOGICA-OECOLOGIA PLANTARUM | 1987年 / 8卷 / 03期
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暂无
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
An apparatus was designed for outdoor measurement of the ratio of two wavelength bands, particularly red and far-red. A sensor, containing optical and electronic components, is connected to a signal processing unit displaying the red to far-red ratio and signals proportional to the irradiance at each waveband. Calibration procedures and technical performance are given. The low cost of components for the apparatus and the build-in voltage divider make the apparatus suitable for ecological studies where measurements under different conditions and sometimes continuous recordings are necessary. Examples of contrasting values of the red to far-red ratio and of their biological effects are given.
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页码：281 / 290
页数：10
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