期刊
FOREST ECOLOGY AND MANAGEMENT
卷 256, 期 5, 页码 1096-1103出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.foreco.2008.06.013
关键词
allometric relationships; biomass allocation; expansion factor; total stand biomass; wood density
类别
资金
- Quantification of the biomass of forest stands in the first age class [APVT27-023504]
- MSMT [2B06012]
- Natural Environment Research Council [cpb010001] Funding Source: researchfish
- NERC [cpb010001] Funding Source: UKRI
Roots, stems, branches and needles of 160 Norway spruce trees younger than 10 years were sampled in seven forest stands in central Slovakia in order to establish their biomass functions (BFs) and biomass expansion factors (BEFs). We tested three models for each biomass pool based on the stem base diameter, tree height and the two parameters combined. BEF values decreased for all spruce components with increasing height and diameter, which was most evident in very young trees under 1 m in height. In older trees, the values of BEFs did tend to stabilise at the height of 3-4 m. We subsequently used the BEFs to calculate dry biomass of the stands based on average stem base diameter and tree height. Total stand biomass grew with increasing age of the stands from about 1.0 Mg ha(-1) at 1.5 years to 44.3 Mg ha(-1) at 9.5 years. The proportion of stem and branch biomass was found to increase with age, while that of needles was fairly constant and the proportion of root biomass did decrease as the stands grew older. (C) 2008 Elsevier B.V. All rights reserved.
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