Abstract
In this paper the objective was to study diurnal and seasonal changes in Yulan Magmolia tree by SWR principle. Laboratory and field tests were performed. Laboratory calibration test was performed on two sapwood samples, which shows that the relation between the volumetric water content and the output voltage of SWR sensor was monotonic as the coefficients R2 reached above 0.90.were periodically weighed on a balance. In field test, the diurnal and seasonal changes were monitored in natural Yulan Magmolia tree by SWR sensor for nearly 2 years. It indicated that seasonal variation of stem water content measured was 20% ~ 25%. A maximum in stem water content occurred in summer, then decreased in autumn, and reaching a minimum in winter, recovery is almost complete till next spring. The short-term (diurnal) variations were found 2% ~ 5%. The daily changes show that a decline in stem water content happened, and then recovered each day. At the same time, leaf water content and sap flow velocity were measured, which shows that diurnal leaf water potential has the similar curve with diurnal stem water content while sap flow velocity was reverse to stem water content.
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References
Wullschleger, S.D., Hanson, P.J., Todd, D.E.: Measuring stem water content in four deciduous hardwoods with a time-domain reflectometer. Tree Physiology 16, 809–815 (1996)
Irvine, J., Grace, J.: Non-destructive measurement of stem water content by time domain reflectometry using short probes. Jour. Exp. Botany 48(308), 813–818 (1997)
Nadler, A., Raveh, E.: Evaluation of TDR Use to Monitor Water Content in Stem of Lemon Trees and Soil and Their Response to Water Stress. SSSAJ 67(2), 437–448 (2003)
Edwards, W.R.N., Jarvis, P.G.: A method for measuring radial differences in water content of intact tree stems by attenuation of gamma radiation. Plant Cell and Environment 6, 255–260 (1983)
Brough, D.W., Jones, H.G., Grace, J.: Diurnal changes in water content of the stems of apple trees, as influenced by irrigation. Plant Cell and Environment 9, 1–7 (1986)
Byrne, G.F., Fenn, M.D., Burgar, M.I.: Nuclear magnetic resonance studies of water in tree sections. Agric. For. Meteorol. 38, 307–317 (1986)
Raschi, A., Tognetti, R., Ridder, H.W., Beres, C.: Water in the stems of sessile oak (Quercus petraea) assessed by computer tomography with concurrent measurements of sap velocity and ultrasound emission. Plant Cell Environ. 18, 545–554 (1995)
Constantz, J., Murphy, F.: Monitoring Moisture Storage in Trees Using Time Domain Reflectometry. Journal of Hydrology 119, 31–42 (1990)
Holbrook, N.M., Burns, M.J., Sinclair, T.R.: Frequency and Time-Domain Dielectric Measurements of Stem Water Content in the Arborescent Palm, Sabal Palmetto. Journal of Experimental Botany 43(246), 111–119 (1992)
Schiller, G., Cohen, Y.: Water regime of pine forest under a mediterranean climate. Agri. and For. Meter 74, 181–193 (1995)
Wang, H.L., Bai, C.X., Zhao, Y.D.: Experiment on the Probe Configuration of Stem Water Content Measuring Sensor. Transactions of the Chinese Society for Agricultural Machinery 1(40), 176–179 (2009)
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Wang, H., Zhao, Y. (2010). Diurnal and Seasonal Changes in Stem Water Content of Single Yulan Magmolia Tree. In: Wang, F.L., Deng, H., Gao, Y., Lei, J. (eds) Artificial Intelligence and Computational Intelligence. AICI 2010. Lecture Notes in Computer Science(), vol 6320. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-16527-6_4
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DOI: https://doi.org/10.1007/978-3-642-16527-6_4
Publisher Name: Springer, Berlin, Heidelberg
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