Soil carbon sequestration during the establishment phase of Miscanthus × giganteus: a regional‐scale study on commercial farms using 13C natural abundance
Soil carbon sequestration during the establishment phase of Miscanthus × giganteus: a regional‐scale study on commercial farms using 13C natural abundance
复制标题
芒草生长阶段的土壤碳固存：利用 13C 自然丰度对商业农场进行的区域规模研究
DOI：
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Michael B. Jones
中科院分区：
文献类型：
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作者：
J. Zimmermann;J. Dauber;Michael B. Jones
利用生物质生产能源被认为是减少净碳排放和减缓气候变化的一种有前途的方式。然而，土地使用向生物能源作物的转变可能导致土壤和植被的碳排放量可能需要数十年才能补偿。多年生草本植物如芒草为这一问题提供了一个可能的解决方案，因为在种植芒草的实验地块上进行的测量表明，土壤中有显著的碳固存作用。然而，可以预期，由于耕作方法和土壤特性不同，商业用途中的固碳潜力可能与试验地块中测得的潜力不同。在本研究中，对爱尔兰东南部16个农场的芒属种植园以及代表以前土地使用（草地和耕作）的农场控制进行了检查。芒草人工林年龄为2-3年。测量了土壤有机碳（SOC）含量和一些土壤特性，并使用13 C天然丰度法确定了芒属植物来源的碳量。在前耕作地和草地上，尽管芒草和对照地的SOC含量没有显著差异，但研究表明，芒草种植后2-3年，前耕作地和前草地的SOC分别为1.82 ± 1.69和2.17 ± 1.73 Mg ha−1。混合效应模型用于将总SOC浓度和芒草衍生碳与土地利用参数以及土壤性质联系起来。结果表明，在对照样地，pH值对总SOC有影响。在芒草碳的情况下，初始SOC含量，pH值，以前的土地利用和作物年龄有显着影响。
The use of biomass for energy production is considered a promising way to reduce net carbon emissions and mitigate climate change. However, land‐use change to bioenergy crops can result in carbon emissions from soil and vegetation in amounts that could take decades to compensate. Perennial grasses such as Miscanthus offer a possible solution to this problem as measurements on experimental plots planted with Miscanthus have shown significant carbon sequestration in the soil. It can, however, be expected that sequestration potentials in commercial use might differ from those measured in experimental plots due to different farming practices and soil characteristics. For this study, Miscanthus plantations on 16 farms in SE Ireland as well as on‐farm controls representing the former land‐use (grassland and tillage) have been examined. The Miscanthus plantations were 2–3 years old. Soil organic carbon (SOC) content and a number of soil properties were measured and the amount of Miscanthus‐derived carbon was determined using the 13C natural abundance method. On both former tillage fields and grasslands, although there were no significant differences in SOC contents between Miscanthus and control sites, it was shown that 2–3 years after Miscanthus establishment, 1.82 ± 1.69 and 2.17 ± 1.73 Mg ha−1 of the SOC under former‐tilled and former grassland respectively were Miscanthus‐derived. Mixed‐effects models were used to link the total SOC concentrations and Miscanthus‐derived carbon to the land‐use parameters as well as to soil properties. It was shown that on control sites, pH had an effect on total SOC. In the case of Miscanthus‐derived carbon, the initial SOC content, pH, former land‐use and crop age had significant effects.
影响因子：
9.7
作者：
Ernst, Gregor;Henseler, Isabell;Emmerling, Christoph
通讯作者：
Emmerling, Christoph