THE USE OF PHYSIOLOGICAL INDICATORS OF WATER STATUS IN IRRIGATION SCHEDULING IN CITRUS

P. Braun, D. Aspinall, F. Lenz
Several physiological indicators of plant water status (IPWS) have been tested in citrus for their use in defining the refill point, that is the lowest possible soil water content without a decrease in yield or quality. Stomatal conductance, leaf-to-air temperature differential and midday leaf water potential proved to be unsatisfactory in defining such a point. Predawn leaf water potential might be useful in shallow soils, where water status deteriorates fast, once a relationship to yield is established. Fruit growth rate reacted very sensitively to changes in soil moisture and as it is directly related to yield, can assist in defining the lowest possible soil water content, before irrigation is necessary.
Braun, P., Aspinall, D. and Lenz, F. (1989). THE USE OF PHYSIOLOGICAL INDICATORS OF WATER STATUS IN IRRIGATION SCHEDULING IN CITRUS. Acta Hortic. 240, 267-270
DOI: 10.17660/ActaHortic.1989.240.49
https://doi.org/10.17660/ActaHortic.1989.240.49

Acta Horticulturae