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Article

Alleyway Cover Crops Have Little Influence on Pinot noir Grapevines (Vitis vinifera L.) in Two Western Oregon Vineyards

Rebecca M. Sweet, R. Paul Schreiner
Am J Enol Vitic.  2010  61: 240-252  ; DOI: 10.5344/ajev.2010.61.2.240
Rebecca M. Sweet
1Department of Horticulture, Oregon State University, Corvallis, OR 97330, present address, Van Duzer Vineyards, 11975 Smithfield Rd., Dallas, OR 97338; 2USDA-ARS Horticultural Crops Research Laboratory, 3420 NW Orchard Ave., Corvallis, OR 97330.
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R. Paul Schreiner
1Department of Horticulture, Oregon State University, Corvallis, OR 97330, present address, Van Duzer Vineyards, 11975 Smithfield Rd., Dallas, OR 97338; 2USDA-ARS Horticultural Crops Research Laboratory, 3420 NW Orchard Ave., Corvallis, OR 97330.
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  • For correspondence: Paul.Schreiner@ars.usda.gov
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Abstract

Seven cover-crop treatments were compared in two north Willamette Valley Pinot noir vineyards over two years to test if alleyway cover crops that are mowed in spring and summer compete with grapevines for water or nutrients. Five different cover-crop mixtures were compared to a clean-cultivated control and resident vegetation treatments in 2004 and 2005. Treatments were evaluated for biomass production, quantity of nitrogen (N) contributed to the vineyard floor, weed suppression, and effect on soil water content. Vine responses to the different floor-management strategies included measures of shoot growth, water and nutrient status, yield, and juice quality. Three treatments were evaluated for their effect on fine roots and colonization by arbuscular mycorrhizal fungi (AMF). Cover crops influenced soil moisture in a different manner at each site, although the lowest soil moisture was consistently found in the perennial grass and clover mixture. Cover-crop treatments had an impact on grapevine N status at one vineyard, altering leaf blade N concentrations at bloom and juice N concentrations at harvest, although different treatments did not alter N status consistently over time. Cover crops did not alter shoot growth, pruning mass, leaf water potential, fine root density, or colonization of roots by AMF and did not affect yield, cluster weights, juice soluble solids, pH, or titratable acidity. Results showed that alleyway cover crops managed by spring and summer mowing do not have consistent effects on grapevines in western Oregon vineyards and suggest that little competition occurs between cover crops and vines in the mixtures evaluated. Further examination of cover crops composed primarily of clovers or of perennial grasses is warranted.

  • competition
  • leaf water potential
  • shoot growth
  • soil moisture
  • yield
  • fruit quality
  • Received April 2009.
  • Revision received October 2009.
  • Accepted December 2009.
  • Published online June 2010
  • Copyright © 2010 by the American Society for Enology and Viticulture
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Alleyway Cover Crops Have Little Influence on Pinot noir Grapevines (Vitis vinifera L.) in Two Western Oregon Vineyards
Rebecca M. Sweet, R. Paul Schreiner
Am J Enol Vitic.  2010  61: 240-252  ; DOI: 10.5344/ajev.2010.61.2.240
Rebecca M. Sweet
1Department of Horticulture, Oregon State University, Corvallis, OR 97330, present address, Van Duzer Vineyards, 11975 Smithfield Rd., Dallas, OR 97338; 2USDA-ARS Horticultural Crops Research Laboratory, 3420 NW Orchard Ave., Corvallis, OR 97330.
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R. Paul Schreiner
1Department of Horticulture, Oregon State University, Corvallis, OR 97330, present address, Van Duzer Vineyards, 11975 Smithfield Rd., Dallas, OR 97338; 2USDA-ARS Horticultural Crops Research Laboratory, 3420 NW Orchard Ave., Corvallis, OR 97330.
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  • For correspondence: Paul.Schreiner@ars.usda.gov

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Alleyway Cover Crops Have Little Influence on Pinot noir Grapevines (Vitis vinifera L.) in Two Western Oregon Vineyards
Rebecca M. Sweet, R. Paul Schreiner
Am J Enol Vitic.  2010  61: 240-252  ; DOI: 10.5344/ajev.2010.61.2.240
Rebecca M. Sweet
1Department of Horticulture, Oregon State University, Corvallis, OR 97330, present address, Van Duzer Vineyards, 11975 Smithfield Rd., Dallas, OR 97338; 2USDA-ARS Horticultural Crops Research Laboratory, 3420 NW Orchard Ave., Corvallis, OR 97330.
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R. Paul Schreiner
1Department of Horticulture, Oregon State University, Corvallis, OR 97330, present address, Van Duzer Vineyards, 11975 Smithfield Rd., Dallas, OR 97338; 2USDA-ARS Horticultural Crops Research Laboratory, 3420 NW Orchard Ave., Corvallis, OR 97330.
  • Find this author on Google Scholar
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  • For correspondence: Paul.Schreiner@ars.usda.gov
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