Citation
Awal M. A., . and Wan Ishak W. I., . and Endan J., . and Mohd. Haniff Harun, . (2004) Imaging approach for determination of canopy structure in oil palm. [Proceedings Paper]
Abstract
Leaf area index and the fractional interception photo-synthetically active radiation PAR 0.4 .7 is two important factors of oil palm growth and development which strongly control water carbon and energy exchanges between vegetation and the atmosphere. They are used in many ecological model and simulation model but difficult and time consume to measure directly in oil palm plantation. Hemispherical photography is a powerful tool which was examined and evaluated in this study to estimation of leaf area index and fractional interception of PAR in oil palm. Photographs were taken from different ages palm 2 3 7 9 12 and 16 year olds. From each palm group 40 photograph were chosen for analysis and total 240 images were analysis in this study. Images were analysis by commercial software Hemi View 2.1 Delta-T Devices UK. The average LAI values found to be closer to real LAI values. For calculation of LAI value above 5 years it was necessary to multiply by a corresponding conversion factor to find out true LAI from photography LAI. However for less than 5 years palm here 2 year and 3 year photography LAI value was equal to true LAI value. A good linear relationship was found between gap fraction and leaf area index from the photographic results. The fractional interception of PAR was found slightly lower than quantum sensor values.
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Abstract
Leaf area index and the fractional interception photo-synthetically active radiation PAR 0.4 .7 is two important factors of oil palm growth and development which strongly control water carbon and energy exchanges between vegetation and the atmosphere. They are used in many ecological model and simulation model but difficult and time consume to measure directly in oil palm plantation. Hemispherical photography is a powerful tool which was examined and evaluated in this study to estimation of leaf area index and fractional interception of PAR in oil palm. Photographs were taken from different ages palm 2 3 7 9 12 and 16 year olds. From each palm group 40 photograph were chosen for analysis and total 240 images were analysis in this study. Images were analysis by commercial software Hemi View 2.1 Delta-T Devices UK. The average LAI values found to be closer to real LAI values. For calculation of LAI value above 5 years it was necessary to multiply by a corresponding conversion factor to find out true LAI from photography LAI. However for less than 5 years palm here 2 year and 3 year photography LAI value was equal to true LAI value. A good linear relationship was found between gap fraction and leaf area index from the photographic results. The fractional interception of PAR was found slightly lower than quantum sensor values.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. QK710.2 M239 2004 Call Number |
| AGROVOC Term: | Oil palm |
| AGROVOC Term: | Leaf area index |
| AGROVOC Term: | Photography |
| AGROVOC Term: | Fractionation |
| AGROVOC Term: | Aerial photography |
| AGROVOC Term: | Leaf canopy |
| AGROVOC Term: | Tree canopy |
| AGROVOC Term: | Satellite imagery |
| AGROVOC Term: | Image analysis |
| AGROVOC Term: | Solar radiation |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:15 |
| URI: | http://webagris.upm.edu.my/id/eprint/12804 |
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