SUB SAMPLING FOR ESTIMATING BIOMASS OF TREE CROWN AND ITS COMPONENTS

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BAKHTIARVAND BAKHTIARI SIAVASH; SOHRABI HORMOZ

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Paper Information

Journal: Journal of Forest and Wood Products Year:2012 | Volume:65 | Issue:3 Page(s): 261-270

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Information Journal Paper

Title

SUB SAMPLING FOR ESTIMATING BIOMASS OF TREE CROWN AND ITS COMPONENTS

Author(s)

BAKHTIARVAND BAKHTIARI SIAVASH | SOHRABI HORMOZ | Issue Writer Certificate

Keywords

SUBSAMPLINGQ2

CROWN BIOMASSQ2

ELDAR PINEQ2

ARIZONA CYPRESSQ3

REGRESSION ANALYSISQ2

MOBARAKE STEEL COMPLEXQ2

Abstract

Considering the global warming and climate change topics, biomass estimation of trees has great importance in theory and application. Measurement of biomass is a costly and time consuming operation And to reduce these difficulties, a large numbers of sampling methods were innovated. One of these methods is the “SUBSAMPLING”. In this research, accuracy of this sampling method for estimating biomass of total and different tree components of two planted coniferous species; ELDAR PINE (Pinus eldarica) and ARIZONA CYPRESS (Cupressus arizonica) were examined in Mobarake Steel factory. Five sample trees from each species were felled down and each component of trees were separated and weighted. Therefore, actual biomass of different tree components was obtained. To test SUBSAMPLING method, tree crown was divided to three parts, upper, lower and medial part and from each part, a number of branches were selected randomly and base diameter of every branch was recorded. Using nonlinear REGRESSION ANALYSIS, models of estimating biomass were obtained. The results showed that, all models were significant at 99.9% confidence level. The minimum and maximum coefficients of determination (r2) of these models were 0.8 and 0.92 for pine and 0.91 and 0.96 for ARIZONA CYPRESS respectively. The least and the most relative bias for pine belongs to estimation of total biomass (0.7%) and main branches (15.1%) and for ARIZONA CYPRESS belongs to estimation of main branches (4.9%) and small branches (29.4%). Based on the results, SUBSAMPLING method is an appropriate method for estimating trees CROWN BIOMASS.

Cites

BRANCH AND LEAF BIOMASS OF LEBANON OAK (QUERCUS LIBANI OLIV.) AND GALL OAK (Q. INFECTORIA OLIV.) TREES IN DIFFERENT YEARS AFTER POLLARDING

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APA: Copy

BAKHTIARVAND BAKHTIARI, SIAVASH, & SOHRABI, HORMOZ. (2012). SUB SAMPLING FOR ESTIMATING BIOMASS OF TREE CROWN AND ITS COMPONENTS. JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES), 65(3), 261-270. SID. https://sid.ir/paper/162854/en

Vancouver: Copy

BAKHTIARVAND BAKHTIARI SIAVASH, SOHRABI HORMOZ. SUB SAMPLING FOR ESTIMATING BIOMASS OF TREE CROWN AND ITS COMPONENTS. JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2012;65(3):261-270. Available from: https://sid.ir/paper/162854/en

IEEE: Copy

SIAVASH BAKHTIARVAND BAKHTIARI, and HORMOZ SOHRABI, “SUB SAMPLING FOR ESTIMATING BIOMASS OF TREE CROWN AND ITS COMPONENTS,” JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 65, no. 3, pp. 261–270, 2012, [Online]. Available: https://sid.ir/paper/162854/en

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