Performance of stem flow gauges in greenhouse and desert environments | Zendy

D. G. Levitt | Zendy; J.R. Simpson | Zendy; Jimmy L. Tipton | Zendy

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Performance of stem flow gauges in greenhouse and desert environments

Author(s) -

D. G. Levitt,

J.R. Simpson,

Jimmy L. Tipton

Publication year - 1995

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/74181

Subject(s) - gauge (firearms) , environmental science , greenhouse , thermocouple , microclimate , flow (mathematics) , hydrology (agriculture) , geography , ecology , biology , horticulture , engineering , physics , mechanics , geotechnical engineering , electrical engineering , archaeology

This study was conducted to evaluate the accuracy and general performance of a heat balance method for estimating transpirational sap flow through plant stems on two tree species in greenhouse and field experiments in Tucson, Arizona. Sap flow through 20-mm diameter stems of oak (Quercus virginiana `Heritage`) and mesquite (Prosopis alba `Colorado`.) trees in containers was measured using stem flow gauges and a precision balance, from January to October, 1991. Overall gauge accuracy, and the effects of gauge location on the tree stem, gauge ventilation, gauge insulation, sheath conductance factor (Ksh) selection method, and increased numbers of vertical thermocouple pairs on gauge performance were evaluated

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