Comparison of biomass and nutrient content between oak (Quercus petraea) and hornbeam (Carpinus betulus) trees in a coppice-with-standards stand in Chimay (Belgium)
Comparison of biomass and nutrient content between oak (Quercus petraea) and hornbeam (Carpinus betulus) trees in a coppice-with-standards stand in Chimay (Belgium)
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DOI：
10.1051/forest:2003042
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发表时间：
2003-09-01
影响因子：
3
通讯作者：
Ponette, Q
中科院分区：
文献类型：
--
作者：
André, F;Ponette, Q
在酸性土壤上的森林林分的管理需要各种采伐情景下的养分输出信息。21棵栎（Quercus petraea（Mattuschka）Liebl.）和18个鹅耳枥（Carpinus betulus L.）破坏性采样从一个矮林与标准的立场位于dystrochrept土壤在比利时大西洋Fagne。建立了回归方程：（1）定量地分配地上生物量和养分（ii）估算林分水平上两个组成树种之间的N、P、K、Ca、Mg、S含量，（iii）估算生物量和养分含量分布（树干，树干皮，枝木/枝皮从各种直径级）在两个物种作为一个函数的胸高直径，和（iii）评估橡树茎内和茎间的营养浓度模式。对于分支机构（死的和活的）和茎，加权平均浓度（木材+树皮）往往是更高的所有元素，除钙在茎和K在所有组件中的角材。对于这两个物种，活枝中的营养元素浓度随着分支直径的增加而降低（0-1 cm至> 21 cm），除了橡树中的Ca。对于橡树茎和大的分支，急剧增加的Ca浓度，注意到树皮组织相比，木材。在林分水平，81%的总生物量和67%（镁）至87%（钙）的总养分含量与橡树。0-40 cm土壤交换性养分库中Mg含量占30%-270%（Ca）。假设所有的橡树砍伐，冠和茎的收获被证明是增加营养物质的出口从85%（钙）到281%（镁）相比，只有干的情况。
The management of forest stands on acid soils requires information on nutrient exports under various harvesting scenarios. Twenty one oaks (Quercus petraea (Mattuschka) Liebl.) and eighteen hornbeams (Carpinus betulus L.) were destructively sampled from a coppice-with-standards stand located on a dystrochrept soil in the Belgian Atlantic Fagne. Regression equations were developed (i) to quantify the partitioning of aboveground biomass and nutrient (N, P, K, Ca, Mg, S) content between the two component species at the stand level, (ii) to estimate the biomass and nutrient content distribution (stemwood, stembark, branchwood/branchbark from various diameter classes) within the two species as a function of breast height diameter, and (iii) to assess the pattern of nutrient concentrations within and between oak stems. For branches ( dead and alive) and stems, weighted mean concentrations (wood + bark) tended to be higher in hornbeams for all elements except Ca in stems and K in all components. For both species, nutrient concentrations in live branches decreased with increasing branch diameter (0-1 cm up to > 21 cm), except for Ca in oaks. For oaks stems and large branches, a steep increase in Ca concentrations was noted in bark tissues compared to wood. At the stand level, 81% of total biomass and from 67% (Mg) to 87% (Ca) of total nutrient contents were associated with oak trees. Aboveground nutrient contents represented from 30% (Mg) to 270% (Ca) of the 0-40 cm exchangeable soil pools. Assuming the felling of all oak trees, the harvest of crowns and stems was shown to increase nutrient exports from 85% (Ca) to 281% (Mg) in comparison with a stem only scenario.