ABOVEGROUND BIOMASS ESTIMATION OF SMALL DIAMETER TREES OF CARPINUS BETULUS, FAGUS ORIENTALIS AND PARROTIO PERSICA BY USING POWER REGRESSION MODEL

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DARYAEI A.; SOHRABI H.

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Journal: Journal of Wood and Forest Science and Technology Year:2015 | Volume:22 | Issue:2 Page(s): 137-150

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Title

ABOVEGROUND BIOMASS ESTIMATION OF SMALL DIAMETER TREES OF CARPINUS BETULUS, FAGUS ORIENTALIS AND PARROTIO PERSICA BY USING POWER REGRESSION MODEL

Author(s)

DARYAEI A. | SOHRABI H. | Issue Writer Certificate

Keywords

POWER REGRESSIONQ1

ALLOMETRIC EQUATIONSQ2

DIAMETER AT BREAST HEIGHTQ2

NON-DESTRUCTIVE ESTIMATIONQ2

Abstract

Background and objectives: Estimation of forest carbon stocks essentially needs accurate estimation of biomass. During last decade, many regression models have been developed, while biomass estimation of the small diameter trees as a missing part of forest measurements is highly significant. The main objective of this study is to develop ALLOMETRIC EQUATIONS for easy, non-destructive, low cost and fast estimation of different tree components biomass including stem, branch, leaf, bark and total biomass of small diameter trees of Carpinus betulus, Fagus orientalis, and Parrotio persica.Materials and methods: From each species, 9 intact trees with 2-8 cm diameter were randomly selected and collar diameter, DIAMETER AT BREAST HEIGHT, stem diameter at the crown bottom, crown width, and height were measured. Then the trees were felled down and different parts were weighted. One sample from each part of each individual was transferred to the lab and dried in oven until reaching a constant weight (48 hours in 70 C for leaves and 72 hours in 80 C for other woody parts) and the percentage of dry weight was calculated. The most appropriate equations for estimating the different parts of the trees biomass were selected using POWER REGRESSION model. For selecting these equations, R2, standard error and regression analyses of variance were used.Results: The results showed that among the various independent variables, DIAMETER AT BREAST HEIGHT is the most appropriate estimator in the term of determination coefficient (R2) for estimating woody parts biomass of small diameter trees in all studied species. Highest determination coefficients were observed for stem biomass of Carpinus betulus (0.928), stem biomass of Fagus orientalis (0.934) and total aboveground biomass of Parrotio persica (0.936).Conclusion: Amongst the different standing tree parameters, DIAMETER AT BREAST HEIGHT a lone can be used to derive reliable ALLOMETRIC EQUATIONS. In general, establishing ALLOMETRIC EQUATIONS for woody parts of small diameter trees with high precision is achievable. But, for non-woody parts, highly precise equation is not derivable; this may be a result of high variability of leaf biomass in younger age due to variable environmental conditions such as available light.

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APA: Copy

DARYAEI, A., & SOHRABI, H.. (2015). ABOVEGROUND BIOMASS ESTIMATION OF SMALL DIAMETER TREES OF CARPINUS BETULUS, FAGUS ORIENTALIS AND PARROTIO PERSICA BY USING POWER REGRESSION MODEL. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, 22(2), 137-150. SID. https://sid.ir/paper/156874/en

Vancouver: Copy

DARYAEI A., SOHRABI H.. ABOVEGROUND BIOMASS ESTIMATION OF SMALL DIAMETER TREES OF CARPINUS BETULUS, FAGUS ORIENTALIS AND PARROTIO PERSICA BY USING POWER REGRESSION MODEL. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY[Internet]. 2015;22(2):137-150. Available from: https://sid.ir/paper/156874/en

IEEE: Copy

A. DARYAEI, and H. SOHRABI, “ABOVEGROUND BIOMASS ESTIMATION OF SMALL DIAMETER TREES OF CARPINUS BETULUS, FAGUS ORIENTALIS AND PARROTIO PERSICA BY USING POWER REGRESSION MODEL,” JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, vol. 22, no. 2, pp. 137–150, 2015, [Online]. Available: https://sid.ir/paper/156874/en

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