In this study, the sap flow rate of two tropical timber species, Hopea odorata and Khaya ivorensis, was estimated. The sap flow pattern of H. odorata and K. ivorensis at the Forest Research Institute Malaysia (FRIM) campus was assessed, involving trees of three different diameter sizes, respectively. The diameters of the H. odorata trees chosen for this study were 16 cm (small), 23 cm (medium), and 33 cm (large), whereas the K. ivorensis trees under examination had diameters of 18 cm (small), 24 cm (medium), and 37 cm (large). The sap flow rate of these trees was measured using a sap flow metre (SFM) with a heat ratio method (HRM). It was found that the average daily sap flow rate was higher in the large H. odorata (46.20 L/day), compared to small (21.19 L/day) and medium (23.05 L/day). As for K. ivorensis, the daily sap flow rate was higher for the medium tree (19.83 L/day) compared to the small (17.52 L/day) and large (6.93 L/day). Our findings show that the sap flow rate pattern in H. odorata and K. ivorensis differ by diameter size. In other words, diameter size contributes to the varied water use in H. odorata and K. ivorensis.
| Attribute name | Attribute value |
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| Book Details | |
| Author | L Marryanna, WA Wan Mohd Shukri, J Avelinah & MR Sheriza |
| Publication Date | 2023 |
| Language | English |
| Publication Code | FTI 88 |
| Pages | 8pp |
