Carbon and nitrogen isotopes and concentrations in terrestrial plants from a six-year (2006-2012) fertilization experiment at the Arctic LTER, Toolik Filed Station, Alaska.

 The data set describes stable carbon and nitrogen isotopes and carbon and nitrogen concentrations from an August 2012 pluck of a fertilization experiment begun in 2006. Fertilization was with nitrogen (N) and phosphorus (P). Fertilization levels included control, F2, F5, and F10, with F2 corresponding to yearly additions of 2 g/m2 N and 1 g/m2 P, F5 corresponding to yearly additions of 5 g/m2 N and 2.5 g/m2 P, and F10 corresponding to yearly additions of 10 g/m2 N and 5 g/m2 P. After harvest, plants were separated by species and then by tissue. Tissues were then dried, ground and analyzed for stable isotopes and concentrations at the University of New Hampshire stable isotope laboratory.本数据集记录了2012年8月对2006年启动的施肥实验开展采样所获得的稳定碳、氮同位素（stable carbon and nitrogen isotopes）及碳、氮浓度（carbon and nitrogen concentrations）数据。本次实验施用氮（N）与磷（P）两种肥料，设置了对照组、F2、F5及F10共4种施肥梯度：其中F2对应每年施加2 g/m² 氮与1 g/m² 磷，F5对应每年施加5 g/m² 氮与2.5 g/m² 磷，F10对应每年施加10 g/m² 氮与5 g/m² 磷。样品收获后，研究人员先按物种对植物进行分类，再按组织器官进行分离；随后将组织样品干燥、研磨，并送至新罕布什尔大学稳定同位素实验室，完成稳定同位素与元素浓度的检测分析。