Through the Wine Australia Riverina Regional Program, NSW DPI, Riverina Wine Grape Growers and Edaphic Scientific have installed a sap flow (Figure 1) and dendrometer (Figure 2) demonstration in the Griffith Centre for Irrigated Agriculture vineyard.
The project will demonstrate how phytomonitoring measurements of sap flow (estimation of total plant water use) and the use of dendrometers (measuring changes in trunk diameter) can be used for informed irrigation scheduling and management decisions.
Between fruit set and veraison (EL 27–35) vines use about 35% of their annual water requirements. Irrigation techniques such as regulated deficit irrigation (replacing approximately 25 to 50% of ETcrop) and partial root-zone drying can be used to save water and positively affect berry quality.
Figure 1. The sap flow meter attached to a vine.
Figure 2. A dendrometer attached to a trunk.
In both Chardonnay and Shiraz varieties, this demonstration will evaluate the vines response to:
between EL 27–35 and the subsequent vine stress and grape quality during summer heatwaves.
The demonstration design is in Figure 3.
Figure 3. The demonstration design of the Shiraz and Chardonnay vineyards.