Data for: Tree-ring 15N isotope of red alder

# Nitrogen dynamics under N2-fixing Alnus rubra *** Included are the soil, litter and tree ring data for the replacement series trial with red alder and coastal Douglas-fir. Results are focused on nitrogen concentrations and delta 15 nitrogen isotope. ## Description of the data and file structure Column one is the treatment code, the proportion of alder and fir. Column two is the subplot with each treatment. The remaining columns are the data, including mass and chemical concentrations. A missing data point is referenced by 'n/a'. The main data sets are the forest floors (or organic horizons as the surface), the underlying mineral soil, the leaf litter collected over the growing season, and the increment cores taken from the trees ## Sharing/Access information All data used in the manuscript are included in this Dryad submission. Further questions about the data can be made through the British Columbia Ministry of Forests

# 固氮红桤木（Alnus rubra）林下的氮素动态 *** 本数据集包含红桤木与海岸花旗松替代系列试验的土壤、凋落物及树木年轮数据，研究聚焦于氮浓度与δ¹⁵N氮同位素（delta 15 nitrogen isotope）。

## 数据与文件结构说明
第一列为处理代码，代表桤木与花旗松的种植比例；第二列为各处理对应的样地分区。其余列均为试验数据，涵盖生物量与化学物质浓度指标。缺失数据以'n/a'标注。核心数据集涵盖森林枯落物层（即地表有机层）、下层矿质土壤、生长季采集的叶片凋落物，以及从树木钻取的树芯样品。

## 共享与获取说明
本稿件中使用的全部数据均已包含在本次Dryad提交的数据集内。若有关于该数据集的进一步疑问，可通过不列颠哥伦比亚省林业厅咨询。