Estimating growth (girth) yield and above-ground biomass of Hevea brasiliensis: Validation of the WaNuLCAS model

Yahya A. K., . Estimating growth (girth) yield and above-ground biomass of Hevea brasiliensis: Validation of the WaNuLCAS model. pp. 183-192. ISSN 1511-1768

An effort was made to validate the WaNuLCAS (Water Nutrients and Light Capture in Agroforestry Systems) model in order to test its efficiency to predict growth (girth) yield above-ground biomass as well as leaves and twigs biomass of Hevea brasiliensis. The model was run for 20 years representing the economic lifespan of rubber. The output of the simulation was compared with the observed data for validation purposes. Results from the statistical analysis showed that the model was able to simulate girth rubber production above-ground biomass and leaves and twigs biomass with efficiencies (EF) of 0.83 0.97 0.70 and -0.15 respectively. EF measures the accuracy of the model in performing simulation as compared to experimental data. The optimum value of EF is 1. The negative value for leaves and twigs biomass indicated that the observed mean value was better than the predicted value.

Full text available from: Official URL: http://vitaldoc.lgm.gov.my:8060/vital/access/servi...

Abstract

An effort was made to validate the WaNuLCAS (Water Nutrients and Light Capture in Agroforestry Systems) model in order to test its efficiency to predict growth (girth) yield above-ground biomass as well as leaves and twigs biomass of Hevea brasiliensis. The model was run for 20 years representing the economic lifespan of rubber. The output of the simulation was compared with the observed data for validation purposes. Results from the statistical analysis showed that the model was able to simulate girth rubber production above-ground biomass and leaves and twigs biomass with efficiencies (EF) of 0.83 0.97 0.70 and -0.15 respectively. EF measures the accuracy of the model in performing simulation as compared to experimental data. The optimum value of EF is 1. The negative value for leaves and twigs biomass indicated that the observed mean value was better than the predicted value.

[error in script]

Item Type:	Article
AGROVOC Term:	Hevea brasiliensis
AGROVOC Term:	Biomass
AGROVOC Term:	Growth
AGROVOC Term:	Yields
AGROVOC Term:	Prediction
AGROVOC Term:	Planting
AGROVOC Term:	Agroforestry
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	28 Apr 2025 03:11
URI:	http://webagris.upm.edu.my/id/eprint/23083

Actions (login required)

View Item