Soil ecological stoichiometry in varied microtopographies of an alluvial fan at eastern Helan Mountains,Northwest China

作     者：SHEN Aihong ZHAO Na SHI Yun MI Wenbao SHE Jie ZHANG Fenghong GUO Rui WU Tao LI Zhigang LI Jianhua ZHU Xiaowen LI Hongxia YUE Shaoli SHEN Aihong;ZHAO Na;SHI Yun;MI Wenbao;SHE Jie;ZHANG Fenghong;GUO Rui;WU Tao;LI Zhigang;LI Jianhua;ZHU Xiaowen;LI Hongxia;YUE Shaoli

作者机构：College of Forestry and Prataculture of Ningxia UniversityYinchuan 750021China School of Geography and Planning of Ningxia UniversityYinchuan 750021China Yinchuan Yinxi Ecological Protection Forest Management CenterYinchuan 750002China Helan Mountain National Nature Reserve Administration of NingxiaYinchuan 750021China Ningxia Hui Autonomous Region Agricultural Comprehensive Development CenterYinchuan 750002China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2024年第16卷第12期

页      面：1648-1663页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：funded by the Key Project of Natural Science Foundation of the Ningxia Hui Autonomous Region(2022AAC02020) the Chinese Academy of Engineering and Local Cooperation(2021NXZD8) the Yinchuan Natural Resources Bureau Research Project(022204129004) 

主　　题：enzyme activity soil layer topography soil physical-chemical property dryland 

摘      要：Alluvial fans possess diverse geomorphological features and have a significant impact on soil characteristics and variations in ecological ***,it remains unclear how alluvial fans in arid mountainous areas influence the changes in ecological chemical stoichiometry and,consequently,indirectly affect ecosystem *** fan,with its diverse topographical features,exerts a multifaceted influence on soil formation and *** information exists regarding the ecological stoichiometric characteristics of the alluvial fan in arid mountainous *** study investigated the soil physical-chemical characteristics,enzyme activities,soil ecological stoichiometries,and its driving factors of four types of micro-topographies(alluvial mesas,high floodplain,groove beach,and striated groove)in the foothills of eastern Helan Mountains,*** showed that soil physical and chemical properties in the 0–20 cm soil depth was consistently higher than those in the 20–40 cm soil depth,with no changes in pH,total nitrogen,and total potassium.C:P and N:P ratios in alluvial mesas,high floodplain,and striated groove were significantly higher than those in groove *** analysis showed that soil nutrients played the most significant role in the variation of soil ecological stoichiometry *** influenced soil stoichiometry indirectly,primarily through impacts on enzyme activity and soil nutrient *** findings elucidate the intricate interplay between soil ecological stoichiometric characteristics and environmental factors across diverse micro-topographies in alluvial fan,contributing to our understanding of the formation and development of soil in dryland.