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首页> 外文期刊>Irish Forestry >Soil carbon stocks in a Sitka spruce chronoseq following afforestation
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Soil carbon stocks in a Sitka spruce chronoseq following afforestation

机译：造林后锡特卡云杉chronoseq中的土壤碳储量

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Increasing concentrations of CO_2 and other greenhouse gases in the atmosphere are leading to concern worldwide due to their contribution to the greenhouse effect. As the body of evidence supporting the need for change from a carbon rich economy/society becomes stronger, international mitigation agreements require high quality and precise information. Following the Kyoto Protocol and EU agreements to reduce carbon production, countries could utilise default values or comparable international data tocalculate their carbon budgets. Initially, approximations were successful for generating a guide to a national carbon stock for reporting GHG inventories to the UNFCCC (Tier 1). However, now that the second phase of the Kyoto protocol is running until 2020, greater accuracy is essential and, where possible, nationally specific information is increasingly required (Tier 3, UNFCCC). Forestry and forest soils are seen as a key component in the carbon cycle and depending on their management, can mitigate orcontribute to GHG emissions. Litter and soil organic matter (SOM) are two of the major carbon pools required for reporting under LULUCF. In this study, stocks of SOM and litter were recorded along a chronosequence of Sitka spruce (Picea sitchensis (Bong.) Carr.) on wet mineral gley soil. Over a 47-year period, the rate of soil carbon sequestration was found to be 1.83 t C ha~(-1) yr~(-1). Soil microbial biomass was used to estimate highly active SOM. The mineral soils were also fractionated in a density separation procedure to identify light and heavy SOM pools. These estimates can now be used to model carbon budgets of this most common soil type currently under forestry in Ireland.
机译：大气中CO_2和其他温室气体的浓度不断增加，由于其对温室效应的贡献，引起了全世界的关注。随着越来越多的证据支持富碳经济/社会需要变革的证据，国际减排协议需要高质量和精确的信息。根据《京都议定书》和欧盟减少碳排放的协议，各国可以利用默认值或类似的国际数据来计算其碳预算。最初，成功地采用了近似方法，从而为向UNFCCC报告一级温室气体清单的国家碳储量提供了指南（方法1）。但是，由于《京都议定书》的第二阶段将持续到2020年，因此更高的准确性至关重要，并且在可能的情况下，越来越需要国家特定信息（Tier 3，UNFCCC）。林业和森林土壤被视为碳循环的关键组成部分，取决于其管理方式，可以减轻或促进温室气体排放。凋落物和土壤有机质（SOM）是土地利用，土地利用变化和林业下报告所需的两个主要碳库。在这项研究中，沿湿粒矿物土壤上的Sitka云杉（Picea sitchensis（Bong。）Carr。）的时间序列记录了SOM和枯枝落叶的存量。在47年的时间里，土壤固碳速率为1.83 t C ha〜（-1）yr〜（-1）。土壤微生物生物量用于估计高活性的SOM。还用密度分离程序对矿物土壤进行分级，以识别轻质和重质SOM库。这些估计值现在可以用来为爱尔兰目前在林业下这种最常见的土壤类型的碳预算建模。

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