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首页> 外文期刊>Trees - Structure and Function >Individual biomass factors for beech, oak and pine in Slovakia: a comparative study in young naturally regenerated stands
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Individual biomass factors for beech, oak and pine in Slovakia: a comparative study in young naturally regenerated stands

机译：斯洛伐克山毛榉，橡树和松树的个体生物量因子：年轻自然再生林的比较研究

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摘要

Biomass conversion and expansion factors (BCEF) which convert tree stem volume to whole tree biomass and biomass allocation patterns in young trees were studied in order to estimate tree and stand biomass in naturally regenerated forests. European beech (Fagus sylvatica L.), Sessile oak (Quercus petraea (Mattuschka) Liebl.) and Scots pine (Pinus sylvestris L.) stands were compared. Seven forest stands of each species were chosen to cover their natural distribution in Slovakia. Species-specific BCEF are presented, generally showing a steep decrease in all species in the smallest trees, with the only exception in the case of branch BCEF in beech which grows with increasing tree size. The values of BCEF for all tree compartments stabilise in all species once trees reach about 60–70-mm diameter at base. As they grow larger, all species increase their allocation to stem and branches, while decreasing the relative growth of roots and foliage. There are, however, clear differences between species and also between broadleaves and conifers in biomass allocation. This research shows that species-specific coefficients must be used if we are to reduce uncertainties in estimates of carbon stock changes by afforestation and reforestation activities.
机译：为了估计自然再生森林中的树木和林分生物量，研究了将树茎的体积转换为整棵树的生物量和生物量分配模式的生物量转化和膨胀因子（BCEF）。比较了欧洲山毛榉（Fagus sylvatica L.），无梗橡木（Quercus petraea（Mattuschka）Liebl。）和苏格兰松树（Pinus sylvestris L.）林分。每个物种的七个林分被选为覆盖其在斯洛伐克的自然分布。介绍了特定物种的BCEF，通常显示最小树木中所有物种的急剧减少，唯一的例外是山毛榉BCEF分支随树木大小的增长而增长。一旦树木的底部直径达到约60-70-mm，所有树种的BCEF值在所有物种中都会稳定。随着它们变大，所有物种都增加了对茎和枝的分配，同时降低了根和叶的相对生长。但是，在生物量分配中，物种之间以及阔叶和针叶树之间存在明显的差异。这项研究表明，如果我们要减少通过造林和再造林活动对碳储量变化进行估算的不确定性，则必须使用特定于物种的系数。

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