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年启动的施肥实验所采集样品的稳定碳、氮同位素及碳、氮浓度数据。本次施肥实验施加了氮（N）与磷（P），设置的处理梯度包括对照组、F2、F5及F10：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，植物按物种及组织类型进行分离，随后经干燥、研磨处理，并在新罕布什尔大学（University of New Hampshire）稳定同位素实验室完成稳定同位素与元素浓度的分析测试。