NDLI: Evaluating water stress in irrigated olives: correlation of soil water status, tree water status, and thermal imagery

Content Provider	Springer Nature Link
Author	Ben Gal, Alon Agam, Nurit Alchanatis, Victor Cohen, Yafit Yermiyahu, Uri Zipori, Isaac Presv, Eugene Sprintsin, Michael Dag, Arn
Copyright Year	2009
Abstract	Irrigation of olive orchards is challenged to optimize both yields and oil quality. Best management practices for olive irrigation will likely depend on the ability to maintain mild to moderate levels of water stress during at least some parts of the growing season. We examined a number of soil, plant and remote sensing parameters for evaluating water stress in bearing olive (var. Barnea) trees in Israel. The trees were irrigated with five water application treatments (30, 50, 75, 100 and 125% of potential evapotranspiration) and the measurements of soil water content and potential, mid-day stem water potential, and stomatal resistance were taken. Remote thermal images of individual trees were used to alternatively measure average canopy temperature and to calculate the tree’s crop water stress index (CWSI), testing empirical and analytical approaches. A strong non-linear response showing similar trends and behavior was evident in soil and plant water status measurements as well as in the CWSI, with decreasing rates of change at the higher irrigation application levels. No statistically significant difference was found between the analytical and the empirical CWSI, suggesting that the relative simplicity of the analytical method would make it preferable in practical applications.
Starting Page	367
Ending Page	376
Page Count	10
File Format	PDF
ISSN	03427188
Journal	Irrigation Science
Volume Number	27
Issue Number	5
e-ISSN	14321319
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-03-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Climate Change Sustainable Development Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Environment Agriculture
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Water Science and Technology

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