Citation
Abdul Hayat Mat Saad and Ahmad Nazarudin Mohd Roseli and Rosfarizal Kamaruzaman. (2023) Picus Sonic Tomograph: a case study of Crimson Bottlebrush tree (Melaleuca citrina (Curtis) Dum.Cours). Journal of Tropical Plant Physiology (JTPP) (Malaysia), 15 (1). pp. 46-58. ISSN 1985-0484
Abstract
Trees with a decreasing level of health and structure can become a threat to life and property if they are not properly managed. Thus, a regular visual tree assessment (VTA) is essential to monitor the trees’ conditions. A recent assessment, July 2022, by VTA on an existing Melaleuca citrina in the Forest Research Institute Malaysia (FRIM) showed poor canopy growth colonised by parasitic plants with the emergence of fruiting bodies (conk or mushroom) on its trunk, indicating internal wood decay. Tree inspection using an advanced approach of PiCUS Sonic Tomograph (PiCUS) was performed to evaluate the severity of the decayed trunk. As a non-invasive method, PiCUS measures the wood deterioration in trees using sound wave velocity that moves through the density of the wood. The thicknesses of the residual wall of trees with internal defects were recorded as colour-coded tomograms. The results were then compared with previous observations in the year 2017. The soil penetration test, pH and “The Jar Test” were also adopted to analyse soil properties and condition around the tree. The tomogram images showed an increased percentage of decay from 2017 to 2022 of approximately 2 to 78%, respectively. The sound wood also decreased from 82 to 14% for the respective period. The soil is categorised as silt loamy with pH value of 5.6 to 6.4 while the soil penetration test exceeds a value of 2.06 MPa, which restricts the root growth. This information is vital for further maintenance of urban trees and very useful for managerial decisions.
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Abstract
Trees with a decreasing level of health and structure can become a threat to life and property if they are not properly managed. Thus, a regular visual tree assessment (VTA) is essential to monitor the trees’ conditions. A recent assessment, July 2022, by VTA on an existing Melaleuca citrina in the Forest Research Institute Malaysia (FRIM) showed poor canopy growth colonised by parasitic plants with the emergence of fruiting bodies (conk or mushroom) on its trunk, indicating internal wood decay. Tree inspection using an advanced approach of PiCUS Sonic Tomograph (PiCUS) was performed to evaluate the severity of the decayed trunk. As a non-invasive method, PiCUS measures the wood deterioration in trees using sound wave velocity that moves through the density of the wood. The thicknesses of the residual wall of trees with internal defects were recorded as colour-coded tomograms. The results were then compared with previous observations in the year 2017. The soil penetration test, pH and “The Jar Test” were also adopted to analyse soil properties and condition around the tree. The tomogram images showed an increased percentage of decay from 2017 to 2022 of approximately 2 to 78%, respectively. The sound wood also decreased from 82 to 14% for the respective period. The soil is categorised as silt loamy with pH value of 5.6 to 6.4 while the soil penetration test exceeds a value of 2.06 MPa, which restricts the root growth. This information is vital for further maintenance of urban trees and very useful for managerial decisions.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Melaleuca |
| AGROVOC Term: | tomography |
| AGROVOC Term: | canopy |
| AGROVOC Term: | wood decay |
| AGROVOC Term: | forest mensuration |
| AGROVOC Term: | forest monitoring and assessment |
| AGROVOC Term: | assessment |
| AGROVOC Term: | plant growth |
| AGROVOC Term: | landscaping |
| Geographical Term: | Malaysia |
| Uncontrolled Keywords: | Arboriculture, hazardous tree, internal wood decay, urban tree, visual tree assessment |
| Depositing User: | Ms. Azariah Hashim |
| Date Deposited: | 28 Sep 2024 07:40 |
| Last Modified: | 28 Sep 2024 07:40 |
| URI: | http://webagris.upm.edu.my/id/eprint/1270 |
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