Project Deliverables

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This project was subdivided into 6 deliverables and objectives were established to provide the data needed to complete the deliverable. Each of the deliverables and objectives are listed below. This research is being conducted in California and Washington State by researchers from the University of California at Davis and Riverside, Washington State University and from 3 locations within ARS, Parlier, Davis, and Riverside.

 

Deliverable 1: Develop and recommend sustainable water management strategies for wine, table, raisin, and juice grape production using limited and impaired water supplies.

Investigators: Drs. Jim Ayars, Joan Davenport, Andrew McElrone, Carmen Gispert

 

Objectives for Deliverable 1: 

  1. Determine the effects and limits of deficit irrigation strategies on the yield and quality of wine, grape juice, raisins and table grapes.
  2. Develop technologies to quantify real-time remotely accessible measurements of vineyard-scale evapotranspiration and vine water use. 

Deliverable 2: Develop and recommend sustainable water and soil management strategies to minimize the impacts of salinity on grape yield and quality.

Investigators: Dr. Don Suarez, Mr. Mark Battany

Objectives for Deliverable 2:

  1. Evaluate different leaching strategies for root zone salinity control, including winter leaching.
  2. Quantify the impact of irrigation water quality on infiltration.
  3. Characterize the leaching and transport of salt in the soil profiles.
  4. Evaluate the impact of water management strategies on salt accumulation, soil solution chemistry, soil physical characteristics in the root zone and plant nutrient balance.
     

Deliverable 3: Quantify the effects of objectives 1 and 2 on table grape berry size, color, texture, flavor, on raisin size, flavor, texture, B and B, harvest date, on grape juice brix, color, TA, and methyl anthranalyate and sensory qualities for wine – aroma, mouth feel, flavor and yields.

This deliverable was established to provide guidance for the data collection in the objectives in deliverables 1 and 2. It established the minimum data collection needed to provide consistency in the interpretation of results and comparisons across regions.

Deliverable 4: Develop and expand commercially available grapevine roots that better resist drought and tolerate salinity.

Investigators: Drs. Andrew McElrone, Andrew Walker, Jean-Jacques Lambert, Gary Banuelos


Objectives for Deliverable 4:

  1. Assess currently available, newly released, and new parent rootstock materials for their physiological responses and tolerance to soil salinity and/or drought under greenhouse and field conditions.
  2. Quantify the effects of salinity and/or drought on scion physiological performance in terms of vine water relations, gas exchange, vine mineral nutrition, fruit yield and quality under field and lab conditions.

Deliverable 5: Investigate and quantify the impacts of reduced water supplies and increased salinity on the economic sustainability of grape production under alternative management strategies.

Investigator: Dr. Kurt Schwabe

Objectives for Deliverable 5:

  1. Develop an intra-seasonal model of grape production that evaluates the economic impacts of different leaching and deficit irrigation strategies on grape production within a single season.
  2. Develop an inter-seasonal model of grape production that evaluates the economic impacts of different leaching and deficit irrigation strategies on sustainable grape production across seasons.
  3. Analyze the economic impact of reduced water supplies and increased salinity on field and farm-level management decisions.
  4. Analyze the economic impact of reduced water supplies and increased salinity on the grape/wine industry as well as regional economic activity.

 

Deliverable 6: Disseminate study findings via presentations, publications, Web-based learning and tailgate outreach.

Investigator: Mr. Mark Battany

 

Objectives for Deliverable 6:

  1. Use Grape Community of Practice to deliver recommendation to winegrowers.
  2. Use NGWI Web pages to post findings and progress reports as they become available.
  3. Use VENsource to engage attendees at workshops and conferences.
  4. Conduct tailgate field days and day-long conferences.
  5. Present at project conferences, and publish respected viticulture publications.
  6. Revise extension publications.
  7. Train UC extension specialists on findings.

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