Data of chemical elements extractable fractions concentrations in forest litter horizons of Retisols in the Smolenskoye Poozerie National Park

Data on changes of proxies and chemical elements extractable fractions concentrations of forest soils litter horizons at different stages of reforestation are presented. The following stages of natural reforestation have been identified within the Smolenskoye Poozerye National Park Biosphere Reserve: agrocenosis, meadow, forests with the age of the tree stand <30, 35-60, 70-80, 80-110, 90-130, 110-135 years. In Albic Retisols (Loamic), the differentiation of soil proxies was studied: pH, total organic carbon (TOC), grain size fractions, TC, TN, available P, K, as well as easily-exchangeable, hardly-exchangeable, bound with complexes, Fe-Mn (hydr)oxides fractions of 28 chemical elements.

本数据集呈现了不同造林阶段下森林土壤枯落物层的代用指标（proxies）与可提取态化学元素浓度的变化数据。
斯摩棱斯克湖沼国家公园生物圈保护区内已划定如下自然造林演替阶段：农田生态系统、草甸、林分年龄分别小于30年、35~60年、70~80年、80~110年、90~130年及110~135年的森林。
针对壤质漂白淋溶土（Albic Retisols (Loamic)），本研究分析了其土壤代用指标的分异特征，测定指标包括pH值、总有机碳（total organic carbon, TOC）、颗粒粒级组成、总碳（TC）、总氮（TN）、有效磷（available P）、速效钾（available K），以及28种化学元素的易交换态、难交换态、络合结合态、铁锰（氢）氧化物结合态组分。