This series of lectures covers all aspects of wine grape irrigation practices, from designing a pressurized micro-irrigation system, irrigation scheduling, heat damage avoidance, theory of crop efficient application and surface renewal, to remote sensing to measure crop evapotranspiration. The lectures presented herein present the best management practices, as prepared and recorded by the University of California Davis GRAPES Workgroup. Lectures were recorded on May 22-23, 2019.
A. Grapevine water requirements for optimal yield and quality: A case study in Oakville AVA
This lecture provides an in depth analysis of flavonoid biosynthesis as affected by applied water amounts without adversely affecting yield while investigating canopy porosity.
Slides
- Dr. Kaan Kurtural, Associate Specialist, Cooperative Extension, Department of Viticulture & Enology, UC Davis
B. Spatial Variability of Soil and Cropping as Affected by Plant Water Status
This lecture explains why plant water status may vary in vineyards, and goes into detail about why spatial variability of plant water status is important for cropping, berry and wine composition in red wine grapes.
Slides
- Dr. Kaan Kurtural, Associate Specialist, Cooperative Extension, Department of Viticulture & Enology, UC Davis
C. Prevention and mitigation of heat damage
This lecture explains the reasons behind heat damage to wine grapes, biometeorology and ways to mitigate the damage.
Slides
- Mark Battany, Area Viticulture Advisor, UC Cooperative Extension
D. Grapevine water relations
This lecture explains the science behind water uptake and movement within the grapevine plant and its physiological effects on the primary metabolism.
Slides
- Dr. Alexander Levin, Viticulturist and Assistant Professor, Southern Oregon Research and Extension Center and Department of Horticulture
E. Irrigation scheduling
This lecture explains the science behind ET and plant based irrigation scheduling in grapevines, using shade cast underneath the grapevine with practical examples across the state of California.
Slides
- Dr. Larry E. Williams, Professor & Plant Physiologist, Emeritus, Department of Viticulture & Enology, UC Davis
F. Assessing regional irrigation usage for the grapevine
This lecture highlights the importance of being able to track grapevine water usage in the central coast region of California for production purposes, and the methodology used.
Slides
- Mark Battany, Area Viticulture Advisor, UC Cooperative Extension
G. Mineral nutrition of drip irrigated grapevines
This lecture explains the science behind mineral nutrition of grapevines, and gives practical examples of mineral nutrition deficiencies and how to correct them.
Slides
- Larry Bettiga, Viticulture Farm Advisor, UC Cooperative Extension
H. Design and operation of micro-irrigation systems
This lecture explains the engineering principles behind designing a micro-irrigation system for use in vineyards, with practical examples of pump sizing, filters, flow and resistance of irrigation lines.
Slides
- Dr. Daniele Zaccaria, Associate Agricultural Water Management Specialist, Land, Air & Water Resources, UC Cooperative Extension
I. Tools and Methods for Irrigation Scheduling for Grapevine
This lecture explains the practical aspects of using eddy covariance and surface renewal to sense vineyard evapotranspiration and how to use that data to schedule irrigation.
Slides
- Dr. Daniele Zaccaria, Associate Agricultural Water Management Specialist, Land, Air & Water Resources, UC Cooperative Extension
J. Methods and tools for evapotranspiration measurement and estimation
This lecture delves into the discovery of using surface renewal as a method of measuring plant evapotranspiration in large landscapes. The theory of SR and its application in agricultural landscapes in desert climates has provided direction to legislators and water purveyors.
Slides
- Dr. Kyaw Tha Paw U, Professor of Atmospheric Science and Biometeorologist, Department of Land, Air & Water Resources, UC Davis
K. Recharge practices in production vineyards and SGMA implementation
This lecture explains the use of ground water recharge practices employed in vineyards and how they may mitigate some footprint requirements for SGMA implementation.
Slides
- Dr. Laura Foglia, Assistant Adjunct Professor, Department of Land, Air & Water Resources, UC Davis
L. Sustainable soil management strategies for improved soil health in vineyards
This lecture explains the science behind soil health, strategies for mitigation, and improvements growers can make to ameliorate their soils.
Slides
- Dr. Cristina Lazcano, Assistant Professor of Soils and Plant Nutrition, Department of Land, Air & Water Resources, UC Davis
M. Remote sensing of plant water status using satellite, airborne and UAV: What does it mean for you?
This lecture explains the science behind remote sensing of water status at the vineyard scale using a variety of tools. The lecture gives practical examples from Napa and Tulare Counties for two commodities on how this information may be applied to vineyards.
Slides
- Dr. Susan Ustin, Professor of Environmental and Resource Sciences, Department of Land, Air & Water Resources, UC Davis