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Research Note

Vine and Berry Response of Merlot (Vitis vinifera L.) to Differential Water Stress

Krista C. Shellie
Am J Enol Vitic.  2006  57: 514-518  ; DOI: 10.5344/ajev.2006.57.4.514
Krista C. Shellie
1Research horticulturist, U.S. Department of Agriculture, Agricultural Research Service, Horticultural Crops Research Laboratory, 29603 U of I Lane, Parma ID 83660.
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  • For correspondence: kshellie@uidaho.edu
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Abstract

Merlot vines were drip-irrigated with 100, 70, or 35% of estimated crop evapotranspiration (ETc) or 35% ETc until veraison followed by 70% ETc until harvest. Midday leaf water potential (Ψ) differed among irrigation regimes and ranged from −0.9 to −1.7 MPa, with a 0.3 to 0.5 MPa difference between 35 and 100% ETc. Decline in shoot growth, berry size, cluster weight, yield, trunk growth, cluster number, and berry titratable acidity corresponded with a decline in Ψ. Increasing irrigation from 35 to 70% ETc at veraison consumed 30% less water producing similar yield and quality as the 70% ETc treatment.

  • winegrape
  • evapotranspiration
  • leaf water potential
  • regulated deficit irrigation
  • Received November 2005.
  • Revision received March 2006.
  • Revision received June 2006.
  • Copyright © 2006 by the American Society for Enology and Viticulture
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Vine and Berry Response of Merlot (Vitis vinifera L.) to Differential Water Stress
Krista C. Shellie
Am J Enol Vitic.  2006  57: 514-518  ; DOI: 10.5344/ajev.2006.57.4.514
Krista C. Shellie
1Research horticulturist, U.S. Department of Agriculture, Agricultural Research Service, Horticultural Crops Research Laboratory, 29603 U of I Lane, Parma ID 83660.
  • Find this author on Google Scholar
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  • For correspondence: kshellie@uidaho.edu

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Vine and Berry Response of Merlot (Vitis vinifera L.) to Differential Water Stress
Krista C. Shellie
Am J Enol Vitic.  2006  57: 514-518  ; DOI: 10.5344/ajev.2006.57.4.514
Krista C. Shellie
1Research horticulturist, U.S. Department of Agriculture, Agricultural Research Service, Horticultural Crops Research Laboratory, 29603 U of I Lane, Parma ID 83660.
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • For correspondence: kshellie@uidaho.edu
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