2026-10-13T21:27:13Z https://www.scidb.cn/oai

10.57760/sciencedb.cjae.00180 2026-07-10T15:15:17Z

2026-07-10 Dataset on the contents of 10 elements in litter and soil of Larix gmelinii secondary forest under nitrogen addition in the Nanweng River National Nature Reserve, Heilongjiang Province doi:10.57760/sciencedb.cjae.00180 en This dataset was derived from a long-term simulated nitrogen deposition field experiment conducted in a Larix gmelinii secondary forest within the Nanweng River National Nature Reserve, Heilongjiang Province. The experiment employed a completely randomized block design with three blocks, each containing four 20 m × 20 m plots corresponding to four nitrogen addition treatments: 0, 25, 50 and 75 kg N·hm⁻²·a⁻¹, representing control, low nitrogen, middle nitrogen and high nitrogen treatments, respectively. The nitrogen addition experiment began in 2011, and samples were collected in August 2024. Litter samples were taken from the undecomposed layer and the decomposed layer, while soil samples were collected from the 0–10 cm and 10–20 cm soil layers. After pretreatment including oven-drying, grinding, and sieving, the contents of ten elements—carbon (C), nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sulfur (S), iron (Fe), manganese (Mn) and zinc (Zn)—were determined. Additionally, the release rates of the corresponding elements from the litter were calculated. This dataset is used to analyze the effects of different nitrogen addition treatments on the contents of ten elements in litter and soil and on litter element release rates, to investigate the coupling relationships of these elements between litter and soil, and to provide a theoretical foundation for understanding the influence of nitrogen deposition on carbon and nutrient cycling in forest ecosystems. nitrogen deposition; litter; soil; Larix gmelinii secondary forest Zhao Qiulan Zhu Wencong Wang Qinggui Quan Xiankui EMBARGO https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank