Beyond establishment: Growth trajectories and evolution of chlorosis in planted white spruce

This dataset contains tree-level growth, foliar nutrient concentrations, and chlorosis severity measurements collected from planted white spruce (Picea glauca) and black spruce (Picea mariana) in boreal forests Quebec, Canada. Data were collected from 2008 to 2021 within a randomized block design including different site preparation treatments (organic/humus, mineral soil, and mechanically mixed microsites). The dataset includes repeated measurements of individual trees nested within plots and blocks. Variables include tree height, diameter at breast height (DBH), chlorosis, mortality, foliar nutrient concentrations of N, P, K, Ca, and Mg, needle mass, leaf area index (LAI), and stand basal area components. These data support analyses of mid-term growth trajectories, nutritional status, and the drivers of chlorosis in planted white spruce in eastern boreal forest .本数据集采集自加拿大魁北克省北方森林中的人工种植白云杉（Picea glauca）和黑云杉（Picea mariana），包含林木个体水平的生长指标、叶片养分浓度及失绿症严重程度的测定数据。数据采集周期为2008年至2021年，试验采用随机区组设计，设置了三类立地预处理措施：有机腐殖质基质、矿质土壤基质以及机械混合微生境。 本数据集包含样地与区组内嵌套的单株林木的重复测定数据。测定变量包括树高、胸径（diameter at breast height，DBH）、失绿症状况、死亡率、氮（N）、磷（P）、钾（K）、钙（Ca）及镁（Mg）的叶片养分浓度、针叶生物量、叶面积指数（leaf area index，LAI）以及林分断面积组分。该数据集可用于分析北美东部北方森林中人工种植白云杉的中期生长轨迹、营养状况及失绿症的影响驱动因子。