Plant Soil Environ., 2020, 66(3):119-127 | DOI: 10.17221/616/2019-PSE

Windbreaks as part of climate-smart landscapes reduce evapotranspiration in vineyards, Western Cape Province, South AfricaOriginal Paper

Maik Veste ORCID...*,1,2, Thomas Littmann3, Anton Kunneke4, Ben du Toit4, Thomas Seifert4,5
1 CEBra - Centre for Energy Technology Brandenburg e.V., Cottbus, Germany
2 Institute of Environmental Sciences, Brandenburg University of Technology Cottbus-Senftenberg, Cottbus, Germany
3 DLC - Littmann Consulting, Ennepetal, Germany
4 AgriSciences, Department of Forestry and Wood Sciences, Stellenbosch University, Matieland, South Africa
5 Albert-Ludwigs University Freiburg, Chair of Forest Growth and Dendroecology, Freiburg, Germany

Under the conditions of climate change in South Africa, ecological and technical measures are needed to reduce the water consumption of irrigated crops. Windbreak hedges are long-rated systems in agriculture that significantly reduce wind speed. Their possibilities to reduce evapotranspiration and water demand are being investigated at a vineyard in the Western Cape Province, South Africa. Detailed measurements of meteorological parameters relevant for the computation of reference and crop-specific evapotranspiration following the FAO 56 approaches within a vineyard in the Western Cape Province of South Africa have shown the beneficial effect of an existing hedgerow consisting of 6 m high poplars (Populus simonii (Carrière) Wesm.). With reference to a control station in the open field, the mean wind speed in a position about 18 m from the hedgerow at canopy level (2 m) was reduced by 27.6% over the entire year and by 39.2% over the summer growing season. This effect leads to a parallel reduction of reference evapotranspiration of 15.5% during the whole year and of 18.4% over the growing season. When applying empirical crop-specific Kc values for well-irrigated grapes, the reduction of evapotranspiration is 18.8% over the summer growth period. The introduced tree shelterbelts are a suitable eco-engineering approach to reduce water consumption and to enhance water saving in vineyards.

Keywords: Vitis vinifera L.; dry areas; viticulture; climate change mitigation; agroforestry; irrigation

Published: March 31, 2020  Show citation

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Veste M, Littmann T, Kunneke A, Toit BD, Seifert T. Windbreaks as part of climate-smart landscapes reduce evapotranspiration in vineyards, Western Cape Province, South Africa. Plant Soil Environ. 2020;66(3):119-127. doi: 10.17221/616/2019-PSE.
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