Carbon pools and temporal dynamics along a rotation period in Quercus dominated high forest and coppice with standards stands
Carbon pools and temporal dynamics along a rotation period in Quercus dominated high forest and coppice with standards stands
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DOI：
10.1016/j.foreco.2011.08.006
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发表时间：
2011-11-01
影响因子：
3.7
通讯作者：
Glatzel, Gerhard
中科院分区：
文献类型：
--
作者：
Bruckman, Viktor J.;Yan, Shuai;Glatzel, Gerhard
研究了不同森林经营方式（高林和标准矮林）下两种栎（无柄栎）占优势的时间序列的碳库。目的是研究奥地利东部共同森林管理系统的时间碳动态，特别是土壤中的碳固存和木质生物质生产，以及林分发展。使用时序方法代替时间-空间，以便在每个系统中覆盖整个旋转周期。碳含量测定包括：地上生物量、凋落物、深度50 cm的土壤、活根生物量和矿质土壤层的分解残余物。生物量碳库除细根和残根外，均采用物种特异性异速生长函数进行估算。高林分（HF）平均碳库为143 Mg ha(-1)，标准林分（CS）平均碳库为213 Mg ha（-1）。土壤有机碳（SOC）在总有机碳库（TOC）中所占的平均份额在HF（43.4%）和CS（42.1%）之间差异不大，表明该比例受立地因子，特别是气候因素的控制。虽然o层和有机碳储量在林分发育过程中没有显著变化，但随着林龄的增长，表层土壤生物量（地上和地下）库与C:N之间存在明显的关系。土壤有机碳库似乎非常稳定，应用的方法未检测到造林干预的影响。凋落物的快速分解和矿化表明，在植被期结束时，残木屑的C:N比值较低，表明该部分的周转率较高。与HF相比，CS受益于采伐后的快速再生，因此似乎不太容易受到低降雨量和干燥表土条件的影响。(C) 2011 Elsevier B.V.版权所有
Carbon pools in two Quercus petraea (sessile oak) dominated chronosequences under different forest management (high forest and coppice with standards) were investigated. The objective was to study temporal carbon dynamics, in particular carbon sequestration in the soil and woody biomass production, in common forest management systems in eastern Austria along with stand development. The chronosequence approach was used to substitute time-for-space to enable coverage of a full rotation period in each system. Carbon content was determined in the following compartments: aboveground biomass, litter, soil to a depth of 50 cm, living root biomass and decomposing residues in the mineral soil horizons. Biomass carbon pools, except fine roots and residues, were estimated using species-specific allometric functions. Total carbon pools were on average 143 Mg ha(-1) in the high forest stand (HF) and 213 Mg ha(-1) in the coppice with standards stand (CS). The mean share of the total organic carbon pool (TOC) which is soil organic carbon (SOC) differs only marginally between HF (43.4%) and CS (42.1%), indicating the dominance of site factors, particularly climate, in controlling this ratio. While there was no significant change in O-layer and SOC stores over stand development, we found clear relationships between living biomass (aboveground and belowground) pools and C:N ratio in topsoil horizons with stand age. SOC pools seem to be very stable and an impact of silvicultural interventions was not detected with the applied method. Rapid decomposition and mineralization of litter, indicated by low O-horizon pools with wide C:N ratios of residual woody debris at the end of the vegetation period, suggests high rates of turnover in this fraction. CS, in contrast to HF benefits from rapid resprouting after coppicing and hence seems less vulnerable to conditions of low rainfall and drying topsoil. (C) 2011 Elsevier B.V. All rights reserved.