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Article

Use of Sap-Flow Sensors to Schedule Vineyard Irrigation. I. Effects of Post-Veraison Water Deficits on Water Relations, Vine Growth, and Yield of Shiraz Grapevines

C. Ginestar, J. Eastham, S. Gray, P. Iland
Am J Enol Vitic.  1998  49: 413-420  ; DOI: 10.5344/ajev.1998.49.4.413
C. Ginestar
The University of Western Australia, Soil Science and Plant Nutrition, Nedlands, Western Australia 6907, Australia (Formerly of Co-operative Research Centre for Soil and Land Management)
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J. Eastham
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S. Gray
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P. Iland
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Abstract

Different levels of irrigation based on transpiration data measured using sap-flow sensors were applied after veraison to Shiraz grapevines grown on a two-wire vertical trellis in the Barossa Valley, Australia. Data for the vines of the upper and lower wire were studied separately. The intensity and duration of stress in each treatment was expressed as a water stress integral (Sψ) from the predawn leaf water potentials. Leaf area, yield and post-veraison water use of vines in the different treatments was closely related to Sψ. Irrigation increased grape yields and differences in vine water status after veraison led to differences in the leaf area to fruit weight ratio. It was concluded that data from the sap-flow sensors could be used as a basis for calculating irrigation amounts to influence vine water status, canopy size, and grape yield.

  • irrigation scheduling
  • sap-flow sensors
  • water deficits
  • Shiraz
  • Received August 1997.
  • Copyright 1998 by the American Society for Enology and Viticulture

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Use of Sap-Flow Sensors to Schedule Vineyard Irrigation. I. Effects of Post-Veraison Water Deficits on Water Relations, Vine Growth, and Yield of Shiraz Grapevines
C. Ginestar, J. Eastham, S. Gray, P. Iland
Am J Enol Vitic.  1998  49: 413-420  ; DOI: 10.5344/ajev.1998.49.4.413
C. Ginestar
The University of Western Australia, Soil Science and Plant Nutrition, Nedlands, Western Australia 6907, Australia (Formerly of Co-operative Research Centre for Soil and Land Management)
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J. Eastham
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S. Gray
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P. Iland
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Use of Sap-Flow Sensors to Schedule Vineyard Irrigation. I. Effects of Post-Veraison Water Deficits on Water Relations, Vine Growth, and Yield of Shiraz Grapevines
C. Ginestar, J. Eastham, S. Gray, P. Iland
Am J Enol Vitic.  1998  49: 413-420  ; DOI: 10.5344/ajev.1998.49.4.413
C. Ginestar
The University of Western Australia, Soil Science and Plant Nutrition, Nedlands, Western Australia 6907, Australia (Formerly of Co-operative Research Centre for Soil and Land Management)
  • Find this author on Google Scholar
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J. Eastham
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S. Gray
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P. Iland
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