Dissertation Research: Pedogenesis and Anthropedogenesis on the Southern Piedmont

论文研究：南山麓的土壤发生和人类发生

• 批准号: 1311614
• 负责人: Daniel Richter
• 金额: $ 1.71万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-05-15 至 2015-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1311614&HistoricalAwards=false
• 关键词: Dissertation; Research; Pedogenesis; Anthropedogenesis; Southern

This study builds on current research focused on deep soil carbon storage following reforestation in the Southern Piedmont region of the southeastern United States. Globally, soil contains more carbon than that stored in all land vegetation. However, most studies trying to connect carbon storage with changes in land use have ignored soil deeper than one meter. The investigators hypothesize that the widespread trends of reforestation in this region over the last century have led to deep carbon storage that depends intimately on the chemical behavior of soil iron. To test this hypothesis, specialized carbon measurements (radiocarbon dating) will be made to a depth of two meters in soils that have been either reforested or not reforested over the last century. The carbon measurements will be interpreted alongside results of new analyses of soil iron to provide insights on changes in deep soil carbon storage following reforestation. In the Southern Piedmont, reforested land is by far the dominant land use. This project will improve regional management of forests by showing how reforestation affects the storage of deep soil carbon. The project will also enhance an interdisciplinary collaborations among Duke University, researchers in the International Soil Carbon Network and the German GeoForschungsZentrum program. All project data will be made freely available online as part of a widely disseminated soil carbon database for use by other researchers. Results will also be presented to diverse audiences at various scientific meetings, in peer-reviewed publications, and at regional public hearings on land use.

这项研究建立在目前的研究重点是在美国东南部南部皮埃蒙特地区重新造林后的深层土壤碳储存。 在全球范围内，土壤中的碳含量超过了所有陆地植被中储存的碳含量。 然而，大多数试图将碳储存与土地利用变化联系起来的研究都忽略了超过一米深的土壤。 研究人员假设，在过去的世纪，该地区普遍的重新造林趋势导致了碳的深层储存，这与土壤铁的化学行为密切相关。 为了验证这一假设，将在上个世纪重新造林或未造林的土壤中进行两米深的专门碳测量（放射性碳测年）。 碳测量结果将与土壤铁的新分析结果一起解释，以提供有关重新造林后深层土壤碳储存变化的见解。 在南部皮埃蒙特，重新造林的土地是目前主要的土地用途。该项目将通过展示重新造林如何影响深层土壤碳的储存来改善森林的区域管理。 该项目还将加强杜克大学、国际土壤碳网络和德国GeoForschungsZentrum计划的研究人员之间的跨学科合作。 所有项目数据将作为广泛传播的土壤碳数据库的一部分在网上免费提供，供其他研究人员使用。还将在各种科学会议、同行评审出版物和关于土地使用的区域公开听证会上向各种受众介绍研究结果。