Litter decomposition and nitrogen cycling in forest soils: influences of tree species and site factors

森林土壤中的凋落物分解和氮循环：树种和立地因素的影响

• 批准号: 203607-2012
• 负责人: Prescott, Cindy
• 金额: $ 2.77万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=523495
• 关键词: Litter; decomposition; nitrogen; cycling; forest

In the proposed research, I will measure gross and net rates of N cycling processes in forest floors under several common tree species in common garden experiments to establish how divergent N cycling is amongst tree species, and the characteristics of the litter or forest floors that are most influential in determining the dominant N forms and N fluxes in forest floors under different tree species. This will inform us as to how introducing a new tree species for purposes of forestry, reclamation or assisted migration in response to climate change will alter the site, particularly nitrogen cycling and availability. I will also compare N cycling in natural forests that differ in climate, vegetation and soil, which will provide new insights into soil N cycling in natural forests and the factors that influence the nature of these cycles.

在拟议的研究中，我将在常见花园实验中测量几种常见树种下森林地表中氮循环过程的总速率和净速率，以确定树种之间氮循环的差异程度，以及对确定不同树种下森林地表中主要氮形式和氮通量影响最大的凋落物或森林地表特征。 这将告诉我们，为了应对气候变化而出于林业、开垦或辅助迁徙的目的引入新树种将如何改变该地点，特别是氮循环和可用性。我还将比较不同气候、植被和土壤的天然林中的氮循环，这将为天然林中土壤氮循环以及影响这些循环性质的因素提供新的见解。