Carbon and nitrogen isotopes and concentrations in terrestrial plants from a six-year (2006-2012) fertilization experiment at the Arctic LTER, Toolik Field 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2006年启动的施肥实验于2012年8月采集的植物样品中的稳定碳同位素（stable carbon isotope）、稳定氮同位素（stable nitrogen isotope）以及碳、氮浓度数据。本次实验采用氮（N）与磷（P）配施，设置了对照组、F2、F5、F10共4种施肥水平：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，再按组织器官分离；随后将组织样品经干燥、研磨处理，最终在新罕布什尔大学稳定同位素实验室完成稳定同位素与浓度分析。