Abstract
By using a new kind of single-beam normalized photo-acoustic tomography spectroscopy (PAS-CT) technology with non-damage and weak signals detection, the photo-acoustic tomography spectroscopy, optical absorption properties and photosynthetic pigment content of the green and yellow leaves of Ficus altissima were studied. The results showed that: photo-acoustic tomography spectroscopy could be obtained from different chopping frequency. The more photosynthetic pigment content the leaves of Ficus altissima contain, the bigger optical absorption coefficient and the higher photosynthetic efficiency they have. In the research, we could find that the photosynthetic pigment content of the yellow leaves of Ficus altissma is lower than that of the green ones. As a result, the optical absorption coefficient and the photosynthetic efficiency of the yellow ones were smaller and lower than the green ones. The photo-acoustic tomography spectroscopy technology can be a kind of non-damage detection to confirm the growth of trees. It could make benefits to the controlled environmental forestry and increase forest production to meet the need of forest for 6 billion people. The research showed high practical value to the study and application of the photosynthesis of plants.
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