Allometric Equations for Estimating the Aboveground Biomass of a 14-Year-Old Bamboo Plantation at Moeswe Research Station, Myanmar
Ladawan Puangchit, Su Myat Hnin, and Sarawood Sungkaew
บทคัดย่อ
Abstract
Due to depletion of bamboo resource, the local population in Myanmar is taking initiatives on raising bamboo in their homesteads and in small commercial plantations to guarantee a continuous bamboo supply. In this study, the aboveground biomasses of 10 commercially important bamboo species planted in the bamboo demonstration plot at the Moeswe Research Station, Naypyitaw, Myanmar. Destructive sampling method was used to determine the relationships between biomasses of leaf, branch, stem, culm, and a fundamental variable of growth (diameter at breast height or DBH). For an easier estimation of the aboveground biomass (AGB) of a clump, a relationship between the number of culms per clump and the AGB of a clump was also developed. However, the AGB was over- or under-estimated when the clump biomass models were employed. Therefore, AGB of the culm was calculated using the best-fit power and exponential models in which DBH was used as an independent variable. The sampled clumps were randomly selected for estimating the AGB of 10 bamboo species. The AGB of a sampled clump was calculated by summing the AGB of the culms in a clump. The AGB of different bamboo species were found to be statistically different at p<0.05. Bambusa sp. (109.38 t ha-1) had the highest AGB followed by Dendrocalamus brandisii (79.72 t ha-1), Bambusa nutans (73.89 t ha-1), Bambusa tulda (59.10 t ha-1), Bambusa vulgaris (54.69 t ha-1), Dendrocalamus strictus (40.71 t ha-1), Thyrsostachys siamensis (31.90 t ha-1), Bambusa polymorpha (23.05 t ha-1), Dendrocalamus longispathus (16.66 t ha-1) and Cephalostachyum pergracile (14.22 t ha-1). The AGB was contributed by both the number of culms per clump and the DBH of the culms. With regard to the raising bamboo, Bambusa sp. is the most preferable species owing to a highest number of culms per clump and highest AGB.
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