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Effect of site-specific irrigation management on grapevine yield and fruit quality attributes |
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| Authors: | L McClymont I Goodwin M Mazza N Baker D M Lanyon A Zerihun S Chandra M O Downey |
| Institution: | 1. Department of Primary Industries, Future Farming Systems Research, Private Mail Bag 1, Tatura, VIC, 3616, Australia 2. Department of Primary Industries, Future Farming Systems Research, PO Box 905, Mildura, VIC, 3502, Australia 5. National Centre for Sustainability–SuniTAFE, PO Box 1904, Mildura, VIC, 3500, Australia 3. CSIRO Sustainable Ecosystems, Private Mail Bag 2, Glen Osmond, SA, 5064, Australia 6. Arris Pty Ltd, PO Box 206, Highgate, SA, 5063, Australia 4. Curtin University of Technology, Margaret River, WA, 6285, Australia |
| Abstract: | Spatial variation in yield and fruit composition has been observed in many vineyards, leading to low productivity. In this study, site-specific irrigation was applied in a commercial vineyard (Vitis vinifera L. cv. Shiraz) block in the Sunraysia region of Australia to improve production in low-yielding areas of the block and decrease differences in yield and quality between irrigation management zones. Data collected under uniform irrigation management showed that spatial variation in canopy cover, yield and fruit composition across the vineyard block was substantial. Normalised difference vegetation index (NDVI) and canopy temperature data supported delineation of three irrigation management zones and decisions regarding irrigation strategy. Water use efficiency and yield improvements were achieved by implementing site-specific irrigation. Fruit composition results were varied; pH and titratable acidity showed increased similarity between zones, but other parameters maintained differences between zones. These results lend support to the use of NDVI to determine irrigation management zones. |
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