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ARS Home » Pacific West Area » Davis, California » Crops Pathology and Genetics Research » Research » Research Project #430998

Research Project: Coupling surface renewal, the VSIM model, infrared thermometry and plant water stress indicators to optimize water application in vineyards

Location: Crops Pathology and Genetics Research

Project Number: 2032-21220-007-02-T
Project Type: Trust Fund Cooperative Agreement

Start Date: Apr 15, 2016
End Date: Apr 15, 2019

Objective:
1) Continue efforts to track vineyard water use with surface renewal (SR) in commercial vineyards in combination with plant water stress measurements (3rd year of a continuing project) 2) Compare water use and stress estimates from SR and the Vineyard Soil Irrigation Model (VSIM) across three years (2014-2016) 3) Compare measurements/estimates of plant water stress from gas exchange, water potentials, SR, VSIM, and Infrared Thermometry (IRT) based indices.

Approach:
Overarching Hypothesis: surface renewal will accurately measure evapotranspiration (ET) from vineyards, but will need to be paired with other technology (IRT) or models (VSIM) to provide growers with both the amount and timing needed for irrigation management. We will use our custom made SR sensors in tandem with IRT and plant water stress measurements in a variety commercial vineyards throughout California.