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Microcliamte changes caused by black inter-row mulch decrease flavonoids concentrations in grapes and wines under

Yu Wang1, Xiao-Tong Gao1, Hui-Qing Li1

  • 1Center for Viticulture & Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing 100083, China.

Food Chemistry
|May 24, 2021
PubMed
Summary
This summary is machine-generated.

Black geotextile mulch in vineyards alters microclimate, reducing grape anthocyanins and flavonols. Leaf removal partially restored flavonols but had minimal effect on anthocyanins.

Keywords:
Basal leaf removalColorInter-row mulchLightTemperature

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Area of Science:

  • Viticulture and Enology
  • Plant Science
  • Agricultural Science

Background:

  • Black geotextile inter-row mulch is used for weed control and can influence vineyard microclimate.
  • Understanding its impact on grape quality, specifically flavonoid content, is crucial for winemaking.

Purpose of the Study:

  • To investigate the effects of black geotextile inter-row mulch on microclimate and flavonoid accumulation in grapes.
  • To assess if basal leaf removal can mitigate the negative impacts of mulch on grape flavonoids.

Main Methods:

  • Application of black geotextile inter-row mulch in a semi-arid climate vineyard from 2015-2017.
  • Measurement of microclimate parameters (soil temperature, fruit-zone temperature duration).
  • Analysis of anthocyanins and flavonols concentrations in grapes and wine color.

Main Results:

  • Mulch increased soil and fruit-zone temperatures, decreasing low-temperature duration.
  • Mulch decreased anthocyanins and flavonols concentrations in grapes.
  • Basal leaf removal partially compensated for flavonol loss but had limited effect on anthocyanins.
  • Wines from mulched grapes exhibited less red and more yellow color.

Conclusions:

  • Black geotextile mulch significantly alters vineyard microclimate, impacting grape flavonoid profiles.
  • Inter-row mulching can lead to reduced anthocyanin and flavonol content, affecting wine color.
  • Integrated practices like leaf removal may partially mitigate these effects but require further investigation.