Estimating biomass of loblolly pine (Pinus taeda L.) using allometric equations (Case study: plantations of Chobar-Shaft, Guilan)

Document Type : Research article

Authors

1 M.Sc. Student Forestry, Faculty of Natural Resources, University of Guilan, Someh Sara, Iran

2 Prof., Faculty of Natural Resources, University of Guilan, Someh Sara, Iran

3 Associate Prof., Faculty of Natural Resources, University of Guilan, Someh Sara, Iran

4 Assistant Prof., Research Division of Natural Resources, Guilan Agricultural and Natural Resources Research and Education Center (AREEO), Rasht, Iran

Abstract

The aim of this study was to estimate the biomas of loblolly pine (Pinus taeda L.) using allometry method in compartment 10 of Chobar-Shaft plantation with an area of 61 ha. For this purpose, 30 circular sample plots, each 500 m2 were established. In each sample plot, the diameter of the stump, diameter at breast height (D.B.H), crown width and height of all trees were measured. Totally, 12 trees in different diameter classes were selected and cut about 10 cm above the ground. Fresh weight of different sections of trees was measured. Samples of each section were transferred to the laboratory and get dried in oven and percentage of dry weight was calculated. Modeling of biomass and independent variables was performed using non-linear regression. Normal distribution of data was assessed by Kolmogorov-Smirnov test. For accessing the best result, several models were tested. The results showed that the model of E(YT) = 0/045D2 H0/864  was the best model for estimation of total tree biomass (R2 = 0.952). Results of our research confirmed the value of allometric equations for estimating of stand biomass.

Keywords

References

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Iranian Journal of Forest and Poplar Research
Volume 25, Issue 4 - Serial Number 70
January 2019
Pages 646-655

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