Construction of tree volume equations for Chinese fir plantations in Guizhou Province, southwestern China |
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| Authors: | Zhong-Sheng Xia Wei-Sheng Zeng Song Zhu Hong-Zhang Luo |
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| Institution: | 1 Forest Resources Administration Office of Guizhou Province, Guiyang 550001, China 2 Institute of Forest Resources Information and Technology, Chinese Academy of Forestry, Beijing 100091, China |
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| Abstract: | Forest volume, the major component of forest biomass, is an important issue in forest resource monitoring. It is estimated from tree volume tables or equations. Based on tree volume data of 1840 sample trees from Chinese fir (Cunninghamia lanceolata) plantations in Guizhou Province in southwestern China, parallel one- and two-variable tree volume tables and tree height curves for central and other areas were constructed using an error-in-variable modeling method. The results show that, although the one-variable tree volume equations and height curves between the central and other areas were significantly different, the two-variable volume equations were sufficiently close, so that a generalized two-variable tree volume equation could be established for the entire province. |
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| Keywords: | tree volume two-variable equation one-variable equation error-in-variable modeling method parallel models Chinese fir |
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