Predicting the water-use of Eucalyptus nitens plantations in ...
Predicting the water-use of Eucalyptus nitens plantations in ...
Predicting the water-use of Eucalyptus nitens plantations in ...
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triangle), Florent<strong>in</strong>e th<strong>in</strong>ned (blue diamonds) and Forestier (purple circle). Year <strong>of</strong><br />
measurement is shown for each data po<strong>in</strong>t<br />
Sap velocity is highest <strong>in</strong> <strong>the</strong> 1 -year-old trees, probably beca<strong>use</strong> a small cross-sectional area<br />
<strong>of</strong> stem is support<strong>in</strong>g a relatively large leaf area when compared with <strong>the</strong> older trees, and<br />
beca<strong>use</strong> <strong>the</strong> low height (short path length) and new wood vessels (higher conductivity) <strong>of</strong> <strong>the</strong><br />
seedl<strong>in</strong>gs mean that <strong>the</strong>y would have lower hydraulic resistance (Ryan and Yoder, 1997).<br />
4.1. <strong>Predict<strong>in</strong>g</strong> Forestier <strong>water</strong>-<strong>use</strong> with Equation 1<br />
When <strong>the</strong> basal area (30.18 m 2 /ha) and ra<strong>in</strong>fall (854 mm) values for Forestier are entered <strong>in</strong><br />
Equation 1, <strong>the</strong> estimated annual <strong>water</strong>-<strong>use</strong> is 791 mm. The measured value was 792 mm.<br />
This result provides some confidence that Equation 1 derived from Florent<strong>in</strong>e data can be<br />
applied to E. <strong>nitens</strong> at Forestier.<br />
21
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