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Research Article

Annual Under-Vine Cover Crops Mitigate Vine Vigor in a Mature and Vigorous Cabernet franc Vineyard

Ming-Yi Chou, Justine E. Vanden Heuvel
Am J Enol Vitic. January 2019 70: 98-108; published ahead of print October 10, 2018 ; DOI: 10.5344/ajev.2018.18037
Ming-Yi Chou
1Former Doctor of Philosophy Student, Horticulture Section, 134A Plant Science, Cornell University, Ithaca, NY 14853.
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Justine E. Vanden Heuvel
2Associate Professor, Horticulture Section, Cornell University, Ithaca, NY 14853 and Cornell AgriTech, Geneva, NY 14456.
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  • For correspondence: justine@cornell.edu
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Abstract

Excessive vine vegetative growth in wet, cool climates increases management costs and compromises grape quality. The standard practice of bare soil under vines exacerbates the vigor problem. This study examined the ability of under-vine cover crops to mitigate excessive vigor in a mature vineyard. A three-year study was conducted in a mature Cabernet franc vineyard in Ovid, NY. Under-vine cover crops of chicory (CHI), tall fescue (FES), tillage radish (TR), alfalfa (ALF), or natural vegetation (NV) were established annually since 2014 to compare with a control of glyphosate-maintained bare soil (GLY). Pruning weight was reduced 64% by CHI and 54% by FES or TR compared to GLY in 2015. Primary and lateral shoot growth was suppressed by CHI in 2016. Fruiting zone leaf layer number was reduced by all of the under-vine cover crops in 2015, and by CHI and FES in 2016. Yield per vine was not reduced by any of the under-vine cover crops in any year of the study. Under-vine cover crops had little impact on harvest parameters including soluble solids, titratable acidity, pH, or yeast assimilable nitrogen. Soil properties such as aggregate stability, microbial respiration rate, and carbon mineralizability were improved by some cover crops. Although NV, FES, and TR showed little, and ALF showed neutral, effect on vine growth or yield components, CHI effectively alleviated mature vine vigor without reducing yield in a cool climate. Since water or nutrient competition alone did not fully explain the mitigating effect of under-vine cover crops on vine vigor, other mechanisms such as microbial or allelopathic effects of under-vine cover crops should be examined.

  • cover crop
  • soil properties
  • vine vigor
  • yield
  • Received April 2018.
  • Revision received September 2018.
  • Revision received October 2018.
  • Accepted October 2018.
  • ©2019 by the American Society for Enology and Viticulture
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Vol 70 Issue 1

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Annual Under-Vine Cover Crops Mitigate Vine Vigor in a Mature and Vigorous Cabernet franc Vineyard
Ming-Yi Chou, Justine E. Vanden Heuvel
Am J Enol Vitic.  January 2019  70: 98-108;  published ahead of print October 10, 2018 ; DOI: 10.5344/ajev.2018.18037

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Annual Under-Vine Cover Crops Mitigate Vine Vigor in a Mature and Vigorous Cabernet franc Vineyard
Ming-Yi Chou, Justine E. Vanden Heuvel
Am J Enol Vitic.  January 2019  70: 98-108;  published ahead of print October 10, 2018 ; DOI: 10.5344/ajev.2018.18037
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