Ecological Stoichiometric Characteristics of Soil Carbon, Nitrogen and Phosphorus in Poyang Lake Wetland during Dry Season and Their Influencing Factors

• Published in: Shui tu bao chi xue bao Vol. 39; no. 2; pp. 279 - 288
• Main Authors: DENG Tong, QIAN Haiyan, ZHOU Yangming, XIE Dongming
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Journal of Soil and Water Conservation 01.04.2025
• Subjects: dry season; ecological stoichiometric characteristics; influencing factors; poyang lake wetland; structural equation model
• ISSN: 1009-2242
• DOI: 10.13870/j.cnki.stbcxb.2025.02.037

［Objective］ Investigating the ecological stoichiometry of soil nutrients and the driving mechanisms in wetlands can provide key insights into soil nutrient cycling processes and the internal driving factors. ［Methods］ This study focused on the wetlands of Banghu (semi-controlled lake) and Sizhoutou (open-water area) in the National Nature Reserve of Jiangxi Poyang Lake. Based on correlation analysis and structural equation modeling (SEM), the ecological stoichiometric characteristics of surface soil carbon (C), nitrogen (N), and phosphorus (P) and their key influencing factors under different elevation gradients from 2017 to 2019 were analyzed. ［Results］ The mean concentrations of soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) in the Banghu wetland (9.33, 1.18 and 0.43 g/kg, respectively) were significantly higher than those in the Sizhoutou wetland (2.65, 0.31 and 0.19 g/kg, respectively) (p<0.05). At the same elevation gradient, SOC, TN, and TP concentrations in both wetlands did