COMPARISON OF GASOMETRIC AND GRAVIMETRIC METHODS OF MEASURING LEAF TRANSPIRATION IN POTTED APRICOT TREES
Leaf transpiration rates (E) measured with an ADC portable unit were overestimated when compared with E derived from plant weight loss over time.
The overestimation was more pronounced for highly transpiring apricot trees (206–287%) than for droughted ones (190–230%) The fitting of regression lines between mean daily E values measured with the two methods on well watered trees could be significantly improved by increasing the number of daily measurements with ADC from 1 to 5, but not for trees under water stress or recovering from it.
No correlation between the 2 methods existed when nonhomogeneous data (different time of measurement or daily means compared with single measurements) were compared.
Transpiration rates obtained with the ADC portable unit consistently reflected differences of E between treatments.
Gucci, R., Calì, S.A.R. and Xiloyannis, C. (1990). COMPARISON OF GASOMETRIC AND GRAVIMETRIC METHODS OF MEASURING LEAF TRANSPIRATION IN POTTED APRICOT TREES. Acta Hortic. 278, 343-350
DOI: 10.17660/ActaHortic.1990.278.32
https://doi.org/10.17660/ActaHortic.1990.278.32
DOI: 10.17660/ActaHortic.1990.278.32
https://doi.org/10.17660/ActaHortic.1990.278.32
278_32
343-350