NON-DESTRUCTIVE MEASUREMENT OF WATER CONTENT OF A PLANT USING ULTRASONIC TECHNIQUE

T. Torii, T. Okamoto, O. Kitani
There are ways to measure the water content of a plant without destruction, such as by leaf temperature or stem diameter. These, however, are influenced by environmental conditions and are also difficult to use in the field. A new instrumentation system using ultrasonic technique was developed to measure the water status of plants non-destructively. This is based on the principle that the ultrasonic velocity which goes through the stem and has a clear relation with the water content of the plant.

The relationship between ultrasonic velocity and the water content of a plant was investigated in a phytotron and growth cabinet, and measurements were made of variations in velocity, diameter, and transpiration. The result showed that the variation in ultrasonic velocity had a clear relation with the water status of a plant, and this status could be estimated quantitatively using normalized velocity.

Torii, T., Okamoto, T. and Kitani, O. (1988). NON-DESTRUCTIVE MEASUREMENT OF WATER CONTENT OF A PLANT USING ULTRASONIC TECHNIQUE. Acta Hortic. 230, 389-396
DOI: 10.17660/ActaHortic.1988.230.51
https://doi.org/10.17660/ActaHortic.1988.230.51

Acta Horticulturae