Sensors and instrumentation to measure sap flow in small stem plants

David Morton; H. Ghayvat; S. C. Mukhopadhyay; Steve Green

doi:10.1109/I2MTC.2016.7520519

Sensors and instrumentation to measure sap flow in small stem plants

David Morton, H. Ghayvat, S. C. Mukhopadhyay, Steve Green

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

7 Citations (Scopus)

Abstract

Heat-based sap flow sensors are widely used in research to analyse plant-water relationships and to study water flow dynamics of plants to determine the water requirements for optimum growth. To date, the majority of field studies of sap flow have been conducted in large plants, with only a few methods being suitable for small stems of less than 10 mm in diameter. This paper discusses the suitability of sensors and electronic designs for a heat-based method to monitor sap flows over the velocity range 2-150 cm/hr, in a small plant stems of 5 to 10 mm in diameter. Three heat-pulse methods (Compensated Heat Pulse, Heat Ratio and Tmax) were tested using both internal and external sensor designs. Based on preliminary findings, two alternative methods of analysis were developed and tested in the laboratory. A short field experiment was carried out to compare heat pulse velocity and global solar radiation. We found the external sensor was not suitable for small stems (<20mm diam.) with thick (>3mm) bark. A small internal sensor showed more promising results for resolving a wider range of sap flows and tracking the influence of global solar radiation.

Original language	English
Title of host publication	2016 IEEE International Instrumentation and Measurement Technology Conference (I²MTC 2016) Proceedings
Subtitle of host publication	Measuring the Pulse of Industries, Nature and Humans
Place of Publication	Piscataway, NJ
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	1-6
Number of pages	6
ISBN (Electronic)	9781467392204
DOIs	https://doi.org/10.1109/I2MTC.2016.7520519
Publication status	Published - 22 Jul 2016
Externally published	Yes
Event	2016 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2016 - Taipei, Taiwan Duration: 23 May 2016 → 26 May 2016

Other

Other	2016 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2016
Country/Territory	Taiwan
City	Taipei
Period	23/05/16 → 26/05/16

Keywords

Average Gradient
Compensation Heat Pulse
Heat pulse velocity
Heat Ratio
Sap flow
Tmax

Access to Document

10.1109/I2MTC.2016.7520519

Cite this

Morton, D., Ghayvat, H., Mukhopadhyay, S. C., & Green, S. (2016). Sensors and instrumentation to measure sap flow in small stem plants. In 2016 IEEE International Instrumentation and Measurement Technology Conference (I²MTC 2016) Proceedings: Measuring the Pulse of Industries, Nature and Humans (pp. 1-6). [7520519] Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/I2MTC.2016.7520519

Morton, David ; Ghayvat, H. ; Mukhopadhyay, S. C. et al. / Sensors and instrumentation to measure sap flow in small stem plants. 2016 IEEE International Instrumentation and Measurement Technology Conference (I²MTC 2016) Proceedings: Measuring the Pulse of Industries, Nature and Humans. Piscataway, NJ : Institute of Electrical and Electronics Engineers (IEEE), 2016. pp. 1-6

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title = "Sensors and instrumentation to measure sap flow in small stem plants",

abstract = "Heat-based sap flow sensors are widely used in research to analyse plant-water relationships and to study water flow dynamics of plants to determine the water requirements for optimum growth. To date, the majority of field studies of sap flow have been conducted in large plants, with only a few methods being suitable for small stems of less than 10 mm in diameter. This paper discusses the suitability of sensors and electronic designs for a heat-based method to monitor sap flows over the velocity range 2-150 cm/hr, in a small plant stems of 5 to 10 mm in diameter. Three heat-pulse methods (Compensated Heat Pulse, Heat Ratio and Tmax) were tested using both internal and external sensor designs. Based on preliminary findings, two alternative methods of analysis were developed and tested in the laboratory. A short field experiment was carried out to compare heat pulse velocity and global solar radiation. We found the external sensor was not suitable for small stems (<20mm diam.) with thick (>3mm) bark. A small internal sensor showed more promising results for resolving a wider range of sap flows and tracking the influence of global solar radiation.",

keywords = "Average Gradient, Compensation Heat Pulse, Heat pulse velocity, Heat Ratio, Sap flow, Tmax",

author = "David Morton and H. Ghayvat and Mukhopadhyay, {S. C.} and Steve Green",

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doi = "10.1109/I2MTC.2016.7520519",

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booktitle = "2016 IEEE International Instrumentation and Measurement Technology Conference (I²MTC 2016) Proceedings",

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Morton, D, Ghayvat, H, Mukhopadhyay, SC & Green, S 2016, Sensors and instrumentation to measure sap flow in small stem plants. in 2016 IEEE International Instrumentation and Measurement Technology Conference (I²MTC 2016) Proceedings: Measuring the Pulse of Industries, Nature and Humans., 7520519, Institute of Electrical and Electronics Engineers (IEEE), Piscataway, NJ, pp. 1-6, 2016 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2016, Taipei, Taiwan, 23/05/16. https://doi.org/10.1109/I2MTC.2016.7520519

Sensors and instrumentation to measure sap flow in small stem plants. / Morton, David; Ghayvat, H.; Mukhopadhyay, S. C. et al.
2016 IEEE International Instrumentation and Measurement Technology Conference (I²MTC 2016) Proceedings: Measuring the Pulse of Industries, Nature and Humans. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2016. p. 1-6 7520519.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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ER -

Morton D, Ghayvat H, Mukhopadhyay SC, Green S. Sensors and instrumentation to measure sap flow in small stem plants. In 2016 IEEE International Instrumentation and Measurement Technology Conference (I²MTC 2016) Proceedings: Measuring the Pulse of Industries, Nature and Humans. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE). 2016. p. 1-6. 7520519 doi: 10.1109/I2MTC.2016.7520519

Sensors and instrumentation to measure sap flow in small stem plants

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