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Relationships between canopy Size and aboveground biomass of oil palms: an evaluation of allometric models

Oil palms (OP) in Sabah, Malaysia were studied to explore the relationship between canopy size and aboveground biomass (AGB). Four available allometric equations were used to calculate the dry AGB. Pearson’s correlation analysis was performed between crown diameter (CD) and crown area (CA) towards t...

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Main Authors: Korom A., Phua, Mui How, Matsuura T.
Format: Article
Language:English
Published: Universiti Kebangsaan Malaysia 2016
Subjects:
SD Forestry
Online Access:https://eprints.ums.edu.my/id/eprint/19161/1/Relationships%20between%20canopy%20Size%20and%20aboveground%20biomass%20of%20oil%20palms.pdf
https://eprints.ums.edu.my/id/eprint/19161/
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spelling my.ums.eprints.191612018-03-08T02:24:54Z https://eprints.ums.edu.my/id/eprint/19161/ Relationships between canopy Size and aboveground biomass of oil palms: an evaluation of allometric models Korom A. Phua, Mui How Matsuura T. SD Forestry Oil palms (OP) in Sabah, Malaysia were studied to explore the relationship between canopy size and aboveground biomass (AGB). Four available allometric equations were used to calculate the dry AGB. Pearson’s correlation analysis was performed between crown diameter (CD) and crown area (CA) towards the variables of AGB, height and dbh. In this analysis, the transformation to natural log of variable resulted in better coefficient compared to the original one. The mean of various variables such as height (stem, total and height difference), biomass (crown, trunk and total), dbh (inner and outer) and number of petiole leaf were calculated based on 32 independent sample plots (N = 222 palms) across various age stages from 2 to 24 years. These variables were regressed against CD and age. AGB versus CD was a nonlinear with R2 ranging from 0.950 to 0.975. Random modelling and cross validation between AGB and CD was applied at the ratio of 70:30. Upon checking, the best estimation was achieved by using the allometric equation based on total height due to the lowest relative root mean square error (RMSE) (18.5%) and the least fluctuation between predicted and actual AGB. The other three models had relative RMSE that ranged between 23.9 and 68.8%. This study shows that AGB can be estimated using CD of OP consistently at all ages Universiti Kebangsaan Malaysia 2016 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/19161/1/Relationships%20between%20canopy%20Size%20and%20aboveground%20biomass%20of%20oil%20palms.pdf Korom A. and Phua, Mui How and Matsuura T. (2016) Relationships between canopy Size and aboveground biomass of oil palms: an evaluation of allometric models. Sains Malaysiana, 45 (4). pp. 523-533. ISSN 0126-6039
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
topic SD Forestry
spellingShingle SD Forestry
Korom A.
Phua, Mui How
Matsuura T.
Relationships between canopy Size and aboveground biomass of oil palms: an evaluation of allometric models
description Oil palms (OP) in Sabah, Malaysia were studied to explore the relationship between canopy size and aboveground biomass (AGB). Four available allometric equations were used to calculate the dry AGB. Pearson’s correlation analysis was performed between crown diameter (CD) and crown area (CA) towards the variables of AGB, height and dbh. In this analysis, the transformation to natural log of variable resulted in better coefficient compared to the original one. The mean of various variables such as height (stem, total and height difference), biomass (crown, trunk and total), dbh (inner and outer) and number of petiole leaf were calculated based on 32 independent sample plots (N = 222 palms) across various age stages from 2 to 24 years. These variables were regressed against CD and age. AGB versus CD was a nonlinear with R2 ranging from 0.950 to 0.975. Random modelling and cross validation between AGB and CD was applied at the ratio of 70:30. Upon checking, the best estimation was achieved by using the allometric equation based on total height due to the lowest relative root mean square error (RMSE) (18.5%) and the least fluctuation between predicted and actual AGB. The other three models had relative RMSE that ranged between 23.9 and 68.8%. This study shows that AGB can be estimated using CD of OP consistently at all ages
format Article
author Korom A.
Phua, Mui How
Matsuura T.
author_facet Korom A.
Phua, Mui How
Matsuura T.
author_sort Korom A.
title Relationships between canopy Size and aboveground biomass of oil palms: an evaluation of allometric models
title_short Relationships between canopy Size and aboveground biomass of oil palms: an evaluation of allometric models
title_full Relationships between canopy Size and aboveground biomass of oil palms: an evaluation of allometric models
title_fullStr Relationships between canopy Size and aboveground biomass of oil palms: an evaluation of allometric models
title_full_unstemmed Relationships between canopy Size and aboveground biomass of oil palms: an evaluation of allometric models
title_sort relationships between canopy size and aboveground biomass of oil palms: an evaluation of allometric models
publisher Universiti Kebangsaan Malaysia
publishDate 2016
url https://eprints.ums.edu.my/id/eprint/19161/1/Relationships%20between%20canopy%20Size%20and%20aboveground%20biomass%20of%20oil%20palms.pdf
https://eprints.ums.edu.my/id/eprint/19161/
_version_ 1760229543820394496
score 13.211869

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