Comparison of methods for field scale mapping of plant water status using aerial thermal imagery

作者: Y. Saranga , V. Alchanatis , Y. Cohen , A. Levi , O. Rosenberg

DOI: 10.3920/978-90-8686-778-3_21

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摘要: In previous studies, a model for assessing leaf water potential (LWP) in cotton plants based on Crop Water Stress Index (CWSI) calculated using ground thermal imagery and artificial wet reference (AWR), as the minimum temperature, was developed validated. The AWR cannot be measured from aerial images order to implement this approach, it is essential characterize boundary temperature evaluate validity of CWSI-LWP relationship. Four types references were examined: artificial, theoretical, plant virtual. Three acquired above field. best relationship found between LWP virtual reference: high correlation 1:1 fit. This means that reliable map field can created only an image air temperature. Using LWP-CWSI relationship, mapped each pixel or area interest such irrigation section pre-defined management zone.

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