Compatible Tree Volume and Above-ground Biomass Equations for Larch(Larix spp.)in Northeastern China

Abstract

Abstract: Based on the tree volume and above-ground biomass data of larch(Larix spp.)in northeastern China,the compatible tree volume and above-ground biomass equations and biomass conversion functions were constructed by using the improved models and error-in-variable simultaneous equations in this paper.The results show that:(i)comparing with the commonly-used nonlinear equation without intercept,the volume and biomass nonlinear equations with intercept improve significantly the goodness-of-fit of the regressions;(ii)through the one variable-based compatible equations,the mean prediction errors(MPEs)of tree volume and above-ground biomass estimates are both less than 5%; and through the two variables-based compatible equations,the MPE of tree biomass estimates is about 4%,and the MPE of tree volume estimates is less than 3%.

Key words: tree volume, above-ground biomass, error-in-variable simultaneous equations, model without intercept, mean prediction error, compatibility

CLC Number:

S71
S758

WANG Weibin, DANG Yongfeng, ZENG Weisheng. Compatible Tree Volume and Above-ground Biomass Equations for Larch(Larix spp.)in Northeastern China[J]. FOREST RESOURCES WANAGEMENT, 2012, (2): 69-73.

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